./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.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/cohencu-ll_unwindbound10.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 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 00:17:59,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 00:17:59,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 00:17:59,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 00:17:59,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 00:17:59,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 00:17:59,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 00:17:59,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 00:17:59,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 00:17:59,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 00:17:59,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 00:17:59,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 00:17:59,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 00:17:59,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 00:17:59,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 00:17:59,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 00:17:59,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 00:17:59,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 00:17:59,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 00:17:59,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 00:17:59,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 00:17:59,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 00:17:59,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 00:17:59,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 00:17:59,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 00:17:59,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 00:17:59,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 00:17:59,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 00:17:59,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 00:17:59,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 00:17:59,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 00:17:59,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 00:17:59,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 00:17:59,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 00:17:59,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 00:17:59,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 00:17:59,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 00:17:59,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 00:17:59,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 00:17:59,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 00:17:59,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 00:17:59,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 00:17:59,804 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 00:17:59,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 00:17:59,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 00:17:59,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 00:17:59,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 00:17:59,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 00:17:59,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 00:17:59,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 00:17:59,809 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 00:17:59,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 00:17:59,810 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 00:17:59,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 00:17:59,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 00:17:59,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 00:17:59,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 00:17:59,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 00:17:59,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 00:17:59,811 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 00:17:59,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 00:17:59,811 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 00:17:59,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 00:17:59,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 00:17:59,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 00:17:59,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 00:17:59,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:17:59,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 00:17:59,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 00:17:59,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 00:17:59,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 00:17:59,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 00:17:59,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 00:17:59,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 00:17:59,814 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 00:17:59,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 00:17:59,814 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 00:17:59,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 [2023-02-14 00:17:59,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 00:18:00,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 00:18:00,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 00:18:00,024 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 00:18:00,025 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 00:18:00,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2023-02-14 00:18:01,105 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 00:18:01,255 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 00:18:01,255 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2023-02-14 00:18:01,261 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc1d75e8/d2c33fc88eca4fb7b99b9fc7e14fe5d3/FLAGf8c2844ee [2023-02-14 00:18:01,270 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc1d75e8/d2c33fc88eca4fb7b99b9fc7e14fe5d3 [2023-02-14 00:18:01,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 00:18:01,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 00:18:01,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 00:18:01,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 00:18:01,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 00:18:01,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7442a912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01, skipping insertion in model container [2023-02-14 00:18:01,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 00:18:01,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 00:18:01,379 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/cohencu-ll_unwindbound10.c[588,601] [2023-02-14 00:18:01,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:18:01,398 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 00:18:01,405 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/cohencu-ll_unwindbound10.c[588,601] [2023-02-14 00:18:01,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 00:18:01,421 INFO L208 MainTranslator]: Completed translation [2023-02-14 00:18:01,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01 WrapperNode [2023-02-14 00:18:01,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 00:18:01,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 00:18:01,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 00:18:01,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 00:18:01,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,442 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-02-14 00:18:01,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 00:18:01,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 00:18:01,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 00:18:01,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 00:18:01,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 00:18:01,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 00:18:01,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 00:18:01,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 00:18:01,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (1/1) ... [2023-02-14 00:18:01,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 00:18:01,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:01,502 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 00:18:01,512 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 00:18:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 00:18:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 00:18:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 00:18:01,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 00:18:01,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 00:18:01,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 00:18:01,575 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 00:18:01,577 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 00:18:01,715 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 00:18:01,724 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 00:18:01,732 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 00:18:01,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:18:01 BoogieIcfgContainer [2023-02-14 00:18:01,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 00:18:01,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 00:18:01,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 00:18:01,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 00:18:01,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 12:18:01" (1/3) ... [2023-02-14 00:18:01,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e58919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:18:01, skipping insertion in model container [2023-02-14 00:18:01,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 12:18:01" (2/3) ... [2023-02-14 00:18:01,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e58919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 12:18:01, skipping insertion in model container [2023-02-14 00:18:01,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:18:01" (3/3) ... [2023-02-14 00:18:01,740 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound10.c [2023-02-14 00:18:01,751 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 00:18:01,752 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 00:18:01,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 00:18:01,784 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;@4d3dfb50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 00:18:01,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 00:18:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 00:18:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 00:18:01,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:01,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:01,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2023-02-14 00:18:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:01,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186597815] [2023-02-14 00:18:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:01,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:01,911 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 00:18:01,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:01,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186597815] [2023-02-14 00:18:01,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186597815] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:18:01,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:18:01,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 00:18:01,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338462390] [2023-02-14 00:18:01,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:18:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 00:18:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 00:18:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 00:18:01,937 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 00:18:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:01,952 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2023-02-14 00:18:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 00:18:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2023-02-14 00:18:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:01,958 INFO L225 Difference]: With dead ends: 50 [2023-02-14 00:18:01,958 INFO L226 Difference]: Without dead ends: 22 [2023-02-14 00:18:01,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 00:18:01,966 INFO L413 NwaCegarLoop]: 37 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, 37 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 00:18:01,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:18:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-14 00:18:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-14 00:18:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 00:18:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-02-14 00:18:02,000 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2023-02-14 00:18:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:02,001 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-02-14 00:18:02,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 00:18:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-02-14 00:18:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 00:18:02,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:02,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:02,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 00:18:02,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2023-02-14 00:18:02,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:02,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115009957] [2023-02-14 00:18:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:02,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:02,090 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 00:18:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:02,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115009957] [2023-02-14 00:18:02,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115009957] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:18:02,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:18:02,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 00:18:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782143015] [2023-02-14 00:18:02,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:18:02,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 00:18:02,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 00:18:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 00:18:02,093 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 00:18:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:02,107 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2023-02-14 00:18:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 00:18:02,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-02-14 00:18:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:02,108 INFO L225 Difference]: With dead ends: 36 [2023-02-14 00:18:02,108 INFO L226 Difference]: Without dead ends: 24 [2023-02-14 00:18:02,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 00:18:02,109 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 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 00:18:02,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:18:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-14 00:18:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-14 00:18:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 00:18:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2023-02-14 00:18:02,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2023-02-14 00:18:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:02,115 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2023-02-14 00:18:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 00:18:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2023-02-14 00:18:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 00:18:02,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:02,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:02,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 00:18:02,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2023-02-14 00:18:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:02,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034029683] [2023-02-14 00:18:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:02,246 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 00:18:02,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:02,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034029683] [2023-02-14 00:18:02,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034029683] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 00:18:02,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 00:18:02,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 00:18:02,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061411196] [2023-02-14 00:18:02,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 00:18:02,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 00:18:02,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:02,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 00:18:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 00:18:02,249 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 00:18:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:02,319 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-02-14 00:18:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 00:18:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2023-02-14 00:18:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:02,320 INFO L225 Difference]: With dead ends: 30 [2023-02-14 00:18:02,320 INFO L226 Difference]: Without dead ends: 28 [2023-02-14 00:18:02,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 00:18:02,322 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:02,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 00:18:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-14 00:18:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-14 00:18:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 00:18:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-02-14 00:18:02,331 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2023-02-14 00:18:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:02,331 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-02-14 00:18:02,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 00:18:02,332 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-02-14 00:18:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-14 00:18:02,332 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:02,332 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:02,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 00:18:02,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2023-02-14 00:18:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:02,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430538420] [2023-02-14 00:18:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:02,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:02,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:02,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698427785] [2023-02-14 00:18:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:02,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:02,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:02,362 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 00:18:02,363 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 00:18:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 00:18:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:02,493 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 00:18:02,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:02,590 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 00:18:02,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:02,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430538420] [2023-02-14 00:18:02,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698427785] [2023-02-14 00:18:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698427785] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:02,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:02,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133304241] [2023-02-14 00:18:02,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:02,593 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 00:18:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:02,827 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2023-02-14 00:18:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 13 [2023-02-14 00:18:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:02,829 INFO L225 Difference]: With dead ends: 54 [2023-02-14 00:18:02,829 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 00:18:02,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:02,830 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:02,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 71 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 00:18:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-02-14 00:18:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-14 00:18:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2023-02-14 00:18:02,842 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 13 [2023-02-14 00:18:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:02,843 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2023-02-14 00:18:02,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 00:18:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2023-02-14 00:18:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 00:18:02,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:02,844 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:02,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 00:18:03,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:03,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2023-02-14 00:18:03,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:03,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96516816] [2023-02-14 00:18:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:03,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:03,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415897095] [2023-02-14 00:18:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:03,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:03,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:03,079 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 00:18:03,080 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 00:18:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 00:18:03,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:18:03,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:18:03,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96516816] [2023-02-14 00:18:03,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415897095] [2023-02-14 00:18:03,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415897095] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:03,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:03,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:03,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293135756] [2023-02-14 00:18:03,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:03,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:03,250 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 00:18:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:03,468 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2023-02-14 00:18:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 00:18:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-14 00:18:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:03,470 INFO L225 Difference]: With dead ends: 60 [2023-02-14 00:18:03,470 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 00:18:03,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:03,471 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:03,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 00:18:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-02-14 00:18:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-14 00:18:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-02-14 00:18:03,491 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2023-02-14 00:18:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-02-14 00:18:03,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-14 00:18:03,492 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-02-14 00:18:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-14 00:18:03,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:03,493 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:03,507 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 00:18:03,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:03,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2023-02-14 00:18:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913825364] [2023-02-14 00:18:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:03,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162682704] [2023-02-14 00:18:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:03,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:03,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:03,732 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 00:18:03,734 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 00:18:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 00:18:03,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 00:18:03,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 00:18:04,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:04,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913825364] [2023-02-14 00:18:04,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:04,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162682704] [2023-02-14 00:18:04,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162682704] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:04,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:04,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:04,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948620210] [2023-02-14 00:18:04,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:04,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:04,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:04,132 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 00:18:05,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:05,148 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-02-14 00:18:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 00:18:05,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-02-14 00:18:05,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:05,149 INFO L225 Difference]: With dead ends: 74 [2023-02-14 00:18:05,149 INFO L226 Difference]: Without dead ends: 65 [2023-02-14 00:18:05,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:05,150 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:05,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 60 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 00:18:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-14 00:18:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-14 00:18:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-14 00:18:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2023-02-14 00:18:05,164 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 23 [2023-02-14 00:18:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:05,164 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2023-02-14 00:18:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 00:18:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2023-02-14 00:18:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 00:18:05,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:05,165 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:05,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 00:18:05,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:05,366 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2023-02-14 00:18:05,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:05,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280556942] [2023-02-14 00:18:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:05,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:05,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248058680] [2023-02-14 00:18:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:05,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:05,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:05,375 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 00:18:05,376 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 00:18:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 00:18:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 00:18:05,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 00:18:05,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:05,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280556942] [2023-02-14 00:18:05,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:05,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248058680] [2023-02-14 00:18:05,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248058680] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:05,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:05,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-14 00:18:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783677137] [2023-02-14 00:18:05,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:05,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 00:18:05,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 00:18:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-14 00:18:05,500 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 00:18:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:05,617 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2023-02-14 00:18:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 00:18:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2023-02-14 00:18:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:05,618 INFO L225 Difference]: With dead ends: 140 [2023-02-14 00:18:05,619 INFO L226 Difference]: Without dead ends: 119 [2023-02-14 00:18:05,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 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 00:18:05,620 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 53 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:05,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 00:18:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-14 00:18:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2023-02-14 00:18:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-14 00:18:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2023-02-14 00:18:05,640 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 41 [2023-02-14 00:18:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:05,640 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2023-02-14 00:18:05,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 00:18:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2023-02-14 00:18:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 00:18:05,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:05,641 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:05,663 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 00:18:05,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:05,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 1 times [2023-02-14 00:18:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:05,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960673346] [2023-02-14 00:18:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:05,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:05,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:05,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724609232] [2023-02-14 00:18:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:05,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:05,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:05,938 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 00:18:05,939 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 00:18:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 00:18:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 00:18:06,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 00:18:06,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:06,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960673346] [2023-02-14 00:18:06,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:06,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724609232] [2023-02-14 00:18:06,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724609232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:06,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:06,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-14 00:18:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225607698] [2023-02-14 00:18:06,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:06,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 00:18:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 00:18:06,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:06,253 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-14 00:18:08,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:18:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:08,955 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2023-02-14 00:18:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 00:18:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-02-14 00:18:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:08,960 INFO L225 Difference]: With dead ends: 129 [2023-02-14 00:18:08,960 INFO L226 Difference]: Without dead ends: 127 [2023-02-14 00:18:08,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-14 00:18:08,961 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:08,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 98 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-02-14 00:18:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-14 00:18:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-14 00:18:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 72 states have internal predecessors, (75), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-14 00:18:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2023-02-14 00:18:09,002 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 46 [2023-02-14 00:18:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:09,002 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2023-02-14 00:18:09,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-14 00:18:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2023-02-14 00:18:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 00:18:09,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:09,004 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:09,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 00:18:09,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:09,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:09,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1316290887, now seen corresponding path program 2 times [2023-02-14 00:18:09,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:09,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900231445] [2023-02-14 00:18:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:09,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:09,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:09,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752123066] [2023-02-14 00:18:09,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:18:09,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:09,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:09,216 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 00:18:09,218 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 00:18:09,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:18:09,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 00:18:09,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 00:18:09,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-14 00:18:09,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900231445] [2023-02-14 00:18:09,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752123066] [2023-02-14 00:18:09,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752123066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:09,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:09,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-14 00:18:09,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987668110] [2023-02-14 00:18:09,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:09,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:09,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:09,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-14 00:18:09,493 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-14 00:18:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:10,044 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2023-02-14 00:18:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:10,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 56 [2023-02-14 00:18:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:10,045 INFO L225 Difference]: With dead ends: 141 [2023-02-14 00:18:10,045 INFO L226 Difference]: Without dead ends: 135 [2023-02-14 00:18:10,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:10,046 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:10,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 94 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 00:18:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-14 00:18:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-02-14 00:18:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 81 states have internal predecessors, (84), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-14 00:18:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2023-02-14 00:18:10,071 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 56 [2023-02-14 00:18:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:10,072 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2023-02-14 00:18:10,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-14 00:18:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2023-02-14 00:18:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 00:18:10,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:10,073 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:10,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 00:18:10,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:10,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2023-02-14 00:18:10,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:10,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184655864] [2023-02-14 00:18:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:10,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:10,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847132989] [2023-02-14 00:18:10,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:10,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:10,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:10,286 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 00:18:10,288 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 00:18:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 00:18:10,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-14 00:18:10,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:10,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184655864] [2023-02-14 00:18:10,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847132989] [2023-02-14 00:18:10,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847132989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:18:10,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:18:10,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-14 00:18:10,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602188184] [2023-02-14 00:18:10,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:10,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 00:18:10,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 00:18:10,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-14 00:18:10,703 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-14 00:18:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:10,959 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2023-02-14 00:18:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:10,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67 [2023-02-14 00:18:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:10,960 INFO L225 Difference]: With dead ends: 141 [2023-02-14 00:18:10,960 INFO L226 Difference]: Without dead ends: 137 [2023-02-14 00:18:10,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-02-14 00:18:10,961 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:10,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-14 00:18:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-02-14 00:18:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 82 states have internal predecessors, (85), 37 states have call successors, (37), 21 states have call predecessors, (37), 20 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-14 00:18:10,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2023-02-14 00:18:10,998 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 67 [2023-02-14 00:18:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:10,999 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2023-02-14 00:18:11,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-14 00:18:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2023-02-14 00:18:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 00:18:11,004 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:11,005 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:11,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 00:18:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:11,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2023-02-14 00:18:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:11,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470940074] [2023-02-14 00:18:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:11,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:11,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101094859] [2023-02-14 00:18:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:11,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:11,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:11,215 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 00:18:11,216 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 00:18:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 00:18:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-14 00:18:11,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:11,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470940074] [2023-02-14 00:18:11,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101094859] [2023-02-14 00:18:11,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101094859] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:18:11,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:18:11,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-14 00:18:11,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214763074] [2023-02-14 00:18:11,532 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:11,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 00:18:11,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 00:18:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-14 00:18:11,534 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 00:18:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:11,799 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2023-02-14 00:18:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2023-02-14 00:18:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:11,800 INFO L225 Difference]: With dead ends: 139 [2023-02-14 00:18:11,800 INFO L226 Difference]: Without dead ends: 128 [2023-02-14 00:18:11,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-02-14 00:18:11,801 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:11,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-14 00:18:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-02-14 00:18:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 34 states have call successors, (34), 19 states have call predecessors, (34), 19 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-14 00:18:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2023-02-14 00:18:11,817 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 72 [2023-02-14 00:18:11,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:11,817 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2023-02-14 00:18:11,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 00:18:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2023-02-14 00:18:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 00:18:11,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:11,818 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-14 00:18:11,825 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 00:18:12,022 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,SelfDestructingSolverStorable10 [2023-02-14 00:18:12,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash 514910066, now seen corresponding path program 3 times [2023-02-14 00:18:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:12,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784955403] [2023-02-14 00:18:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:12,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:12,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77912513] [2023-02-14 00:18:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 00:18:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:12,053 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 00:18:12,055 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 00:18:12,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 00:18:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 00:18:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-14 00:18:12,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-14 00:18:13,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:13,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784955403] [2023-02-14 00:18:13,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:13,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77912513] [2023-02-14 00:18:13,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77912513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:13,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:13,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-14 00:18:13,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509300276] [2023-02-14 00:18:13,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:13,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 00:18:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 00:18:13,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-14 00:18:13,153 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 00:18:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:17,782 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2023-02-14 00:18:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 00:18:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 79 [2023-02-14 00:18:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:17,784 INFO L225 Difference]: With dead ends: 139 [2023-02-14 00:18:17,784 INFO L226 Difference]: Without dead ends: 134 [2023-02-14 00:18:17,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-02-14 00:18:17,784 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:17,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 124 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-14 00:18:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-14 00:18:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2023-02-14 00:18:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 80 states have (on average 1.0625) internal successors, (85), 82 states have internal predecessors, (85), 27 states have call successors, (27), 21 states have call predecessors, (27), 21 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-14 00:18:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2023-02-14 00:18:17,834 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 79 [2023-02-14 00:18:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:17,835 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2023-02-14 00:18:17,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 00:18:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2023-02-14 00:18:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-14 00:18:17,836 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:17,837 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:17,843 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 00:18:18,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:18,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times [2023-02-14 00:18:18,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:18,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957618370] [2023-02-14 00:18:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:18,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:18,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762694002] [2023-02-14 00:18:18,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:18:18,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:18,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:18,050 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 00:18:18,053 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 00:18:18,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:18:18,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-14 00:18:18,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 76 proven. 25 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-14 00:18:18,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 92 proven. 1 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2023-02-14 00:18:20,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:20,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957618370] [2023-02-14 00:18:20,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762694002] [2023-02-14 00:18:20,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762694002] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:20,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:20,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-14 00:18:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522676666] [2023-02-14 00:18:20,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:20,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 00:18:20,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 00:18:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-14 00:18:20,531 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-14 00:18:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:22,778 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2023-02-14 00:18:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 00:18:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) Word has length 95 [2023-02-14 00:18:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:22,780 INFO L225 Difference]: With dead ends: 141 [2023-02-14 00:18:22,780 INFO L226 Difference]: Without dead ends: 137 [2023-02-14 00:18:22,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-02-14 00:18:22,780 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:22,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 112 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-14 00:18:22,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-14 00:18:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-02-14 00:18:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 87 states have internal predecessors, (89), 29 states have call successors, (29), 23 states have call predecessors, (29), 22 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-02-14 00:18:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2023-02-14 00:18:22,825 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 95 [2023-02-14 00:18:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:22,827 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2023-02-14 00:18:22,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-14 00:18:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2023-02-14 00:18:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-14 00:18:22,831 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:22,831 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:22,843 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 00:18:23,036 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,SelfDestructingSolverStorable12 [2023-02-14 00:18:23,036 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 2 times [2023-02-14 00:18:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:23,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964948027] [2023-02-14 00:18:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:23,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:23,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360731718] [2023-02-14 00:18:23,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:18:23,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:23,046 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 00:18:23,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 00:18:23,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:18:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 00:18:23,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-14 00:18:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:24,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:24,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964948027] [2023-02-14 00:18:24,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360731718] [2023-02-14 00:18:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360731718] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:18:24,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:18:24,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 00:18:24,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306733441] [2023-02-14 00:18:24,350 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 00:18:24,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 00:18:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-02-14 00:18:24,351 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-14 00:18:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:24,662 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2023-02-14 00:18:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 00:18:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 100 [2023-02-14 00:18:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:24,664 INFO L225 Difference]: With dead ends: 139 [2023-02-14 00:18:24,664 INFO L226 Difference]: Without dead ends: 128 [2023-02-14 00:18:24,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-02-14 00:18:24,665 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:24,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 106 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-14 00:18:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-02-14 00:18:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 80 states have (on average 1.0375) internal successors, (83), 82 states have internal predecessors, (83), 26 states have call successors, (26), 21 states have call predecessors, (26), 21 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-02-14 00:18:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2023-02-14 00:18:24,683 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 100 [2023-02-14 00:18:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:24,684 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2023-02-14 00:18:24,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2023-02-14 00:18:24,684 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2023-02-14 00:18:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-14 00:18:24,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:24,685 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:24,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 00:18:24,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 00:18:24,889 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:24,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2023-02-14 00:18:24,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:24,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836105234] [2023-02-14 00:18:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:24,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:24,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:24,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248116485] [2023-02-14 00:18:24,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:18:24,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:24,898 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:18:24,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 00:18:24,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:18:24,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 00:18:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-14 00:18:25,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-02-14 00:18:25,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:25,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836105234] [2023-02-14 00:18:25,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:25,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248116485] [2023-02-14 00:18:25,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248116485] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:25,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:25,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-14 00:18:25,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908126121] [2023-02-14 00:18:25,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 00:18:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 00:18:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-14 00:18:25,256 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-02-14 00:18:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:25,578 INFO L93 Difference]: Finished difference Result 394 states and 419 transitions. [2023-02-14 00:18:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 00:18:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2023-02-14 00:18:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:25,580 INFO L225 Difference]: With dead ends: 394 [2023-02-14 00:18:25,581 INFO L226 Difference]: Without dead ends: 380 [2023-02-14 00:18:25,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 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 00:18:25,582 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 134 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:25,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 360 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 00:18:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-02-14 00:18:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 313. [2023-02-14 00:18:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 202 states have internal predecessors, (204), 65 states have call successors, (65), 53 states have call predecessors, (65), 53 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2023-02-14 00:18:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 332 transitions. [2023-02-14 00:18:25,623 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 332 transitions. Word has length 125 [2023-02-14 00:18:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:25,623 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 332 transitions. [2023-02-14 00:18:25,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-02-14 00:18:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 332 transitions. [2023-02-14 00:18:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-14 00:18:25,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:25,624 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:25,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 00:18:25,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 00:18:25,829 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:25,829 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 3 times [2023-02-14 00:18:25,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:25,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384275864] [2023-02-14 00:18:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:25,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:25,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:25,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217655561] [2023-02-14 00:18:25,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 00:18:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:25,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:25,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:18:25,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 00:18:25,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 00:18:25,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 00:18:25,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 88 proven. 67 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-02-14 00:18:26,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384275864] [2023-02-14 00:18:26,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217655561] [2023-02-14 00:18:26,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217655561] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:18:26,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:18:26,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 00:18:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790818854] [2023-02-14 00:18:26,644 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:26,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 00:18:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 00:18:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-02-14 00:18:26,645 INFO L87 Difference]: Start difference. First operand 313 states and 332 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-02-14 00:18:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:27,002 INFO L93 Difference]: Finished difference Result 326 states and 345 transitions. [2023-02-14 00:18:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 00:18:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 128 [2023-02-14 00:18:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:27,004 INFO L225 Difference]: With dead ends: 326 [2023-02-14 00:18:27,004 INFO L226 Difference]: Without dead ends: 324 [2023-02-14 00:18:27,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-02-14 00:18:27,005 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:27,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 00:18:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-02-14 00:18:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2023-02-14 00:18:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 200 states have (on average 1.05) internal successors, (210), 208 states have internal predecessors, (210), 67 states have call successors, (67), 55 states have call predecessors, (67), 55 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-14 00:18:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 342 transitions. [2023-02-14 00:18:27,056 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 342 transitions. Word has length 128 [2023-02-14 00:18:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:27,056 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 342 transitions. [2023-02-14 00:18:27,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-02-14 00:18:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 342 transitions. [2023-02-14 00:18:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-14 00:18:27,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:27,057 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:27,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-14 00:18:27,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 00:18:27,262 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:27,263 INFO L85 PathProgramCache]: Analyzing trace with hash 36255119, now seen corresponding path program 1 times [2023-02-14 00:18:27,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:27,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409951220] [2023-02-14 00:18:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:27,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:27,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:27,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023156871] [2023-02-14 00:18:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:27,278 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:18:27,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 00:18:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 00:18:27,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 00:18:27,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-02-14 00:18:27,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:27,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409951220] [2023-02-14 00:18:27,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:27,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023156871] [2023-02-14 00:18:27,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023156871] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:18:27,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:18:27,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-14 00:18:27,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136583396] [2023-02-14 00:18:27,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:27,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 00:18:27,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 00:18:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-02-14 00:18:27,953 INFO L87 Difference]: Start difference. First operand 323 states and 342 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-14 00:18:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:28,354 INFO L93 Difference]: Finished difference Result 330 states and 348 transitions. [2023-02-14 00:18:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 00:18:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 133 [2023-02-14 00:18:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:28,355 INFO L225 Difference]: With dead ends: 330 [2023-02-14 00:18:28,356 INFO L226 Difference]: Without dead ends: 312 [2023-02-14 00:18:28,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-02-14 00:18:28,357 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:28,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 00:18:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-02-14 00:18:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2023-02-14 00:18:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 201 states have internal predecessors, (203), 64 states have call successors, (64), 53 states have call predecessors, (64), 53 states have return successors, (62), 57 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-14 00:18:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 329 transitions. [2023-02-14 00:18:28,419 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 329 transitions. Word has length 133 [2023-02-14 00:18:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:28,420 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 329 transitions. [2023-02-14 00:18:28,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-14 00:18:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 329 transitions. [2023-02-14 00:18:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-14 00:18:28,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:28,421 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:28,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 00:18:28,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:28,626 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 4 times [2023-02-14 00:18:28,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:28,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605865433] [2023-02-14 00:18:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:28,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:28,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:28,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310203910] [2023-02-14 00:18:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 00:18:28,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:28,635 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:18:28,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 00:18:30,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 00:18:30,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 00:18:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 292 proven. 244 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2023-02-14 00:18:30,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:34,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605865433] [2023-02-14 00:18:34,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310203910] [2023-02-14 00:18:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310203910] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 00:18:34,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 00:18:34,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 00:18:34,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737850544] [2023-02-14 00:18:34,861 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:34,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 00:18:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 00:18:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=218, Unknown=1, NotChecked=0, Total=272 [2023-02-14 00:18:34,862 INFO L87 Difference]: Start difference. First operand 312 states and 329 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-02-14 00:18:42,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:18:44,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:18:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:18:47,102 INFO L93 Difference]: Finished difference Result 324 states and 341 transitions. [2023-02-14 00:18:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 00:18:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 156 [2023-02-14 00:18:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:18:47,104 INFO L225 Difference]: With dead ends: 324 [2023-02-14 00:18:47,104 INFO L226 Difference]: Without dead ends: 320 [2023-02-14 00:18:47,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2023-02-14 00:18:47,104 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-02-14 00:18:47,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 72 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2023-02-14 00:18:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-14 00:18:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2023-02-14 00:18:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 199 states have (on average 1.0402010050251256) internal successors, (207), 205 states have internal predecessors, (207), 65 states have call successors, (65), 55 states have call predecessors, (65), 54 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2023-02-14 00:18:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 335 transitions. [2023-02-14 00:18:47,198 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 335 transitions. Word has length 156 [2023-02-14 00:18:47,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:18:47,198 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 335 transitions. [2023-02-14 00:18:47,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-02-14 00:18:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 335 transitions. [2023-02-14 00:18:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-02-14 00:18:47,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:18:47,199 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:18:47,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 00:18:47,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 00:18:47,408 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:18:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:18:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1802004917, now seen corresponding path program 2 times [2023-02-14 00:18:47,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:18:47,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546095698] [2023-02-14 00:18:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:18:47,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:18:47,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:18:47,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341677519] [2023-02-14 00:18:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 00:18:47,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:18:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:18:47,418 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:18:47,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 00:18:47,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 00:18:47,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:18:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-14 00:18:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:18:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 130 proven. 87 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2023-02-14 00:18:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:18:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 130 proven. 87 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2023-02-14 00:18:55,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 00:18:55,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546095698] [2023-02-14 00:18:55,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 00:18:55,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341677519] [2023-02-14 00:18:55,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341677519] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:18:55,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 00:18:55,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-02-14 00:18:55,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931700543] [2023-02-14 00:18:55,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 00:18:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 00:18:55,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:18:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 00:18:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2023-02-14 00:18:55,257 INFO L87 Difference]: Start difference. First operand 319 states and 335 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 12 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 12 states have call predecessors, (56), 12 states have call successors, (56) [2023-02-14 00:19:21,605 WARN L233 SmtUtils]: Spent 22.82s on a formula simplification. DAG size of input: 88 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 00:19:24,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:31,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:34,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:36,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:45,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:47,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:50,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:52,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:54,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:56,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:19:58,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:04,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:06,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:09,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:11,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:19,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:22,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:24,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 00:20:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 00:20:24,885 INFO L93 Difference]: Finished difference Result 331 states and 350 transitions. [2023-02-14 00:20:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 00:20:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 12 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 12 states have call predecessors, (56), 12 states have call successors, (56) Word has length 161 [2023-02-14 00:20:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 00:20:24,887 INFO L225 Difference]: With dead ends: 331 [2023-02-14 00:20:24,887 INFO L226 Difference]: Without dead ends: 289 [2023-02-14 00:20:24,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=135, Invalid=459, Unknown=6, NotChecked=0, Total=600 [2023-02-14 00:20:24,887 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 65 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.6s IncrementalHoareTripleChecker+Time [2023-02-14 00:20:24,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 163 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 783 Invalid, 18 Unknown, 0 Unchecked, 44.6s Time] [2023-02-14 00:20:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-14 00:20:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-02-14 00:20:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 186 states have internal predecessors, (187), 53 states have call successors, (53), 50 states have call predecessors, (53), 50 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-14 00:20:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 292 transitions. [2023-02-14 00:20:24,949 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 292 transitions. Word has length 161 [2023-02-14 00:20:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 00:20:24,949 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 292 transitions. [2023-02-14 00:20:24,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 12 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 12 states have call predecessors, (56), 12 states have call successors, (56) [2023-02-14 00:20:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 292 transitions. [2023-02-14 00:20:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-02-14 00:20:24,953 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 00:20:24,953 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 00:20:24,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 00:20:25,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:20:25,158 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 00:20:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 00:20:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591730, now seen corresponding path program 3 times [2023-02-14 00:20:25,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 00:20:25,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902068919] [2023-02-14 00:20:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 00:20:25,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 00:20:25,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 00:20:25,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593645691] [2023-02-14 00:20:25,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 00:20:25,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:20:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 00:20:25,170 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 00:20:25,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 00:20:25,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2023-02-14 00:20:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-14 00:20:25,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-14 00:20:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-14 00:20:25,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-14 00:20:25,509 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-14 00:20:25,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-14 00:20:25,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-14 00:20:25,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 00:20:25,720 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-14 00:20:25,727 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-14 00:20:25,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 12:20:25 BoogieIcfgContainer [2023-02-14 00:20:25,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-14 00:20:25,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-14 00:20:25,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-14 00:20:25,803 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-14 00:20:25,803 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 12:18:01" (3/4) ... [2023-02-14 00:20:25,804 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-14 00:20:25,890 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-14 00:20:25,891 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-14 00:20:25,891 INFO L158 Benchmark]: Toolchain (without parser) took 144618.15ms. Allocated memory was 113.2MB in the beginning and 140.5MB in the end (delta: 27.3MB). Free memory was 72.8MB in the beginning and 91.9MB in the end (delta: -19.2MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2023-02-14 00:20:25,892 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 113.2MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 00:20:25,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 147.79ms. Allocated memory is still 113.2MB. Free memory was 72.5MB in the beginning and 61.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 00:20:25,892 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.97ms. Allocated memory is still 113.2MB. Free memory was 61.8MB in the beginning and 60.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 00:20:25,892 INFO L158 Benchmark]: Boogie Preprocessor took 30.03ms. Allocated memory is still 113.2MB. Free memory was 60.2MB in the beginning and 59.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 00:20:25,893 INFO L158 Benchmark]: RCFGBuilder took 260.75ms. Allocated memory is still 113.2MB. Free memory was 59.1MB in the beginning and 81.7MB in the end (delta: -22.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-14 00:20:25,894 INFO L158 Benchmark]: TraceAbstraction took 144066.60ms. Allocated memory was 113.2MB in the beginning and 140.5MB in the end (delta: 27.3MB). Free memory was 80.8MB in the beginning and 101.4MB in the end (delta: -20.5MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. [2023-02-14 00:20:25,894 INFO L158 Benchmark]: Witness Printer took 88.25ms. Allocated memory is still 140.5MB. Free memory was 101.4MB in the beginning and 91.9MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-14 00:20:25,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 113.2MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 147.79ms. Allocated memory is still 113.2MB. Free memory was 72.5MB in the beginning and 61.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.97ms. Allocated memory is still 113.2MB. Free memory was 61.8MB in the beginning and 60.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.03ms. Allocated memory is still 113.2MB. Free memory was 60.2MB in the beginning and 59.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 260.75ms. Allocated memory is still 113.2MB. Free memory was 59.1MB in the beginning and 81.7MB in the end (delta: -22.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 144066.60ms. Allocated memory was 113.2MB in the beginning and 140.5MB in the end (delta: 27.3MB). Free memory was 80.8MB in the beginning and 101.4MB in the end (delta: -20.5MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. * Witness Printer took 88.25ms. Allocated memory is still 140.5MB. Free memory was 101.4MB in the beginning and 91.9MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [a=10, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [a=10, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [a=10, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [a=10, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [a=10, counter=4, counter++=3, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [a=10, counter=5, counter++=4, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [a=10, counter=6, counter++=5, n=5, x=125, y=91, z=36] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=6, n=5, x=125, y=91, z=36] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=6, n=6, x=216, y=127, z=42] [L33] EXPR counter++ VAL [a=10, counter=7, counter++=6, n=6, x=216, y=127, z=42] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=7, n=6, x=216, y=127, z=42] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=7, n=7, x=343, y=169, z=48] [L33] EXPR counter++ VAL [a=10, counter=8, counter++=7, n=7, x=343, y=169, z=48] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=8, n=7, x=343, y=169, z=48] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=8, n=8, x=512, y=217, z=54] [L33] EXPR counter++ VAL [a=10, counter=9, counter++=8, n=8, x=512, y=217, z=54] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=9, n=8, x=512, y=217, z=54] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=9, n=9, x=729, y=271, z=60] [L33] EXPR counter++ VAL [a=10, counter=10, counter++=9, n=9, x=729, y=271, z=60] [L33] COND TRUE counter++<10 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [a=10, counter=10, n=9, x=729, y=271, z=60] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [a=10, counter=10, n=10, x=1000, y=331, z=66] [L33] EXPR counter++ VAL [a=10, counter=11, counter++=10, n=10, x=1000, y=331, z=66] [L33] COND FALSE !(counter++<10) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, counter=11] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [a=10, counter=11, n=10, x=1000, y=331, z=66] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 143.9s, OverallIterations: 20, TraceHistogramMax: 52, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 115.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 mSolverCounterUnknown, 547 SdHoareTripleChecker+Valid, 67.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 442 mSDsluCounter, 2103 SdHoareTripleChecker+Invalid, 66.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1461 mSDsCounter, 503 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6120 IncrementalHoareTripleChecker+Invalid, 6643 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 503 mSolverCounterUnsat, 642 mSDtfsCounter, 6120 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2247 GetRequests, 1983 SyntacticMatches, 6 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 58.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=323occurred in iteration=16, InterpolantAutomatonStates: 187, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 19 MinimizatonAttempts, 90 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 20.9s InterpolantComputationTime, 1629 NumberOfCodeBlocks, 1511 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 1964 ConstructedInterpolants, 0 QuantifiedInterpolants, 10334 SizeOfPredicates, 60 NumberOfNonLiveVariables, 2924 ConjunctsInSsa, 479 ConjunctsInUnsatCore, 29 InterpolantComputations, 3 PerfectInterpolantSequences, 10881/12516 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-14 00:20:25,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE