./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.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 7f12bfc45347636ba11cd9198984e4ca6a9fb471afaf773fd02be6e88eb44e8c --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:46:59,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:46:59,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:46:59,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:46:59,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:46:59,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:46:59,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:46:59,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:46:59,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:46:59,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:46:59,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:46:59,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:46:59,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:46:59,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:46:59,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:46:59,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:46:59,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:46:59,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:46:59,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:47:00,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:47:00,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:47:00,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:47:00,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:47:00,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:47:00,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:47:00,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:47:00,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:47:00,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:47:00,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:47:00,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:47:00,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:47:00,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:47:00,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:47:00,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:47:00,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:47:00,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:47:00,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:47:00,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:47:00,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:47:00,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:47:00,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:47:00,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:47:00,039 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:47:00,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:47:00,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:47:00,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:47:00,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:47:00,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:47:00,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:47:00,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:47:00,041 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:47:00,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:47:00,042 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:47:00,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:47:00,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:47:00,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:47:00,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:47:00,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:47:00,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:47:00,043 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:47:00,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:47:00,043 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:47:00,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:47:00,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:47:00,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:47:00,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:47:00,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:47:00,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:47:00,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:47:00,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:47:00,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:47:00,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:47:00,044 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:47:00,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:47:00,045 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:47:00,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:47:00,045 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:47:00,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f12bfc45347636ba11cd9198984e4ca6a9fb471afaf773fd02be6e88eb44e8c [2023-02-17 07:47:00,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:47:00,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:47:00,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:47:00,252 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:47:00,252 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:47:00,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2023-02-17 07:47:01,213 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:47:01,362 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:47:01,362 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2023-02-17 07:47:01,368 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b293669d2/5374bb0a257c42fc906e8d0230ce8ee6/FLAG14548b1d0 [2023-02-17 07:47:01,380 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b293669d2/5374bb0a257c42fc906e8d0230ce8ee6 [2023-02-17 07:47:01,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:47:01,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:47:01,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:47:01,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:47:01,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:47:01,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd068d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01, skipping insertion in model container [2023-02-17 07:47:01,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:47:01,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:47:01,491 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c[524,537] [2023-02-17 07:47:01,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:47:01,508 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:47:01,516 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c[524,537] [2023-02-17 07:47:01,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:47:01,529 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:47:01,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01 WrapperNode [2023-02-17 07:47:01,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:47:01,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:47:01,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:47:01,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:47:01,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,550 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-17 07:47:01,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:47:01,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:47:01,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:47:01,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:47:01,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:47:01,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:47:01,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:47:01,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:47:01,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (1/1) ... [2023-02-17 07:47:01,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:47:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:01,598 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) [2023-02-17 07:47:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:47:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:47:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:47:01,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:47:01,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 07:47:01,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 07:47:01,604 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 [2023-02-17 07:47:01,671 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:47:01,672 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:47:01,775 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:47:01,780 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:47:01,780 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 07:47:01,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:47:01 BoogieIcfgContainer [2023-02-17 07:47:01,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:47:01,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:47:01,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:47:01,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:47:01,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:47:01" (1/3) ... [2023-02-17 07:47:01,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a1bbe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:47:01, skipping insertion in model container [2023-02-17 07:47:01,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:47:01" (2/3) ... [2023-02-17 07:47:01,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a1bbe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:47:01, skipping insertion in model container [2023-02-17 07:47:01,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:47:01" (3/3) ... [2023-02-17 07:47:01,789 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.c [2023-02-17 07:47:01,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:47:01,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:47:01,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:47:01,843 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;@7c82e56b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:47:01,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:47:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:47:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 07:47:01,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:01,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:01,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2023-02-17 07:47:01,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:01,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666018008] [2023-02-17 07:47:01,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:01,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:01,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666018008] [2023-02-17 07:47:01,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:47:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543896957] [2023-02-17 07:47:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:01,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:01,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:01,931 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) [2023-02-17 07:47:01,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:47:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:01,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 07:47:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:01,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:47:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543896957] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:47:01,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:47:01,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 07:47:01,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076625130] [2023-02-17 07:47:01,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:47:01,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 07:47:01,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 07:47:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:47:02,022 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:47:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:02,034 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-17 07:47:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 07:47:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 07:47:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:02,040 INFO L225 Difference]: With dead ends: 43 [2023-02-17 07:47:02,040 INFO L226 Difference]: Without dead ends: 19 [2023-02-17 07:47:02,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:47:02,044 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:02,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:47:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-17 07:47:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-17 07:47:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-02-17 07:47:02,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2023-02-17 07:47:02,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:02,070 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-02-17 07:47:02,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:47:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-02-17 07:47:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 07:47:02,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:02,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:02,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 07:47:02,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 07:47:02,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:02,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2023-02-17 07:47:02,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:02,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034415191] [2023-02-17 07:47:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:02,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:02,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:02,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034415191] [2023-02-17 07:47:02,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:47:02,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091946721] [2023-02-17 07:47:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:02,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:02,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:02,305 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) [2023-02-17 07:47:02,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:47:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 07:47:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:02,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:47:02,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091946721] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:47:02,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:47:02,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 07:47:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522717005] [2023-02-17 07:47:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:47:02,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 07:47:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 07:47:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:47:02,388 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:47:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:02,417 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-02-17 07:47:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:47:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 07:47:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:02,419 INFO L225 Difference]: With dead ends: 29 [2023-02-17 07:47:02,419 INFO L226 Difference]: Without dead ends: 21 [2023-02-17 07:47:02,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:47:02,421 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:02,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:47:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-17 07:47:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-17 07:47:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-02-17 07:47:02,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2023-02-17 07:47:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:02,430 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-02-17 07:47:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:47:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-02-17 07:47:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 07:47:02,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:02,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:02,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:02,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-17 07:47:02,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2023-02-17 07:47:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:02,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415182534] [2023-02-17 07:47:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:02,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:02,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:02,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998567429] [2023-02-17 07:47:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:02,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:02,643 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) [2023-02-17 07:47:02,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:47:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 07:47:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:02,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:47:02,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:02,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415182534] [2023-02-17 07:47:02,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:02,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998567429] [2023-02-17 07:47:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998567429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:47:02,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:47:02,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 07:47:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100193645] [2023-02-17 07:47:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:47:02,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 07:47:02,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:02,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 07:47:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 07:47:02,743 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:47:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:02,857 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-02-17 07:47:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 07:47:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 07:47:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:02,860 INFO L225 Difference]: With dead ends: 34 [2023-02-17 07:47:02,861 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 07:47:02,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-17 07:47:02,864 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:02,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:47:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 07:47:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-02-17 07:47:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:47:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-17 07:47:02,878 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2023-02-17 07:47:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:02,880 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-17 07:47:02,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:47:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-17 07:47:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 07:47:02,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:02,881 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:02,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:47:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:03,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2023-02-17 07:47:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986557018] [2023-02-17 07:47:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:03,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:03,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669054002] [2023-02-17 07:47:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:03,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:03,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:03,110 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) [2023-02-17 07:47:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:47:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 07:47:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:03,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986557018] [2023-02-17 07:47:03,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669054002] [2023-02-17 07:47:03,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669054002] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:47:03,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:47:03,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-17 07:47:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595300791] [2023-02-17 07:47:03,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:47:03,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:47:03,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:47:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:47:03,456 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:03,651 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-02-17 07:47:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:47:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-17 07:47:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:03,654 INFO L225 Difference]: With dead ends: 47 [2023-02-17 07:47:03,655 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 07:47:03,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:47:03,660 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:03,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 71 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:47:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 07:47:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2023-02-17 07:47:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:47:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-02-17 07:47:03,675 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2023-02-17 07:47:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:03,675 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-02-17 07:47:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-02-17 07:47:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 07:47:03,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:03,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:03,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:03,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:03,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2023-02-17 07:47:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:03,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075700082] [2023-02-17 07:47:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:03,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:03,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:03,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096880712] [2023-02-17 07:47:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:03,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:03,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:03,901 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) [2023-02-17 07:47:03,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:47:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 07:47:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:03,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:03,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075700082] [2023-02-17 07:47:03,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096880712] [2023-02-17 07:47:03,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096880712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:47:03,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:47:03,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-17 07:47:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105977845] [2023-02-17 07:47:03,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:47:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 07:47:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 07:47:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-17 07:47:03,963 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:04,026 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2023-02-17 07:47:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 07:47:04,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-17 07:47:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:04,027 INFO L225 Difference]: With dead ends: 95 [2023-02-17 07:47:04,027 INFO L226 Difference]: Without dead ends: 85 [2023-02-17 07:47:04,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 07:47:04,028 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:04,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 120 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:47:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-17 07:47:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2023-02-17 07:47:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 07:47:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2023-02-17 07:47:04,040 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2023-02-17 07:47:04,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:04,041 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2023-02-17 07:47:04,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2023-02-17 07:47:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 07:47:04,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:04,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:04,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:04,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:04,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2023-02-17 07:47:04,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106199680] [2023-02-17 07:47:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:04,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:04,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:04,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386272001] [2023-02-17 07:47:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:04,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:04,254 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) [2023-02-17 07:47:04,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 07:47:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 07:47:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:04,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:04,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:04,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106199680] [2023-02-17 07:47:04,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:04,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386272001] [2023-02-17 07:47:04,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386272001] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:47:04,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:47:04,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-17 07:47:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582713936] [2023-02-17 07:47:04,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:47:04,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:47:04,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:47:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:47:04,639 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:05,120 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2023-02-17 07:47:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 07:47:05,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-17 07:47:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:05,123 INFO L225 Difference]: With dead ends: 102 [2023-02-17 07:47:05,123 INFO L226 Difference]: Without dead ends: 96 [2023-02-17 07:47:05,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:47:05,124 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:05,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 76 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 07:47:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-17 07:47:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2023-02-17 07:47:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 07:47:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2023-02-17 07:47:05,138 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2023-02-17 07:47:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:05,139 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2023-02-17 07:47:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2023-02-17 07:47:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 07:47:05,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:05,141 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:05,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 07:47:05,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:05,346 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2023-02-17 07:47:05,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:05,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122469592] [2023-02-17 07:47:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:05,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:05,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63398282] [2023-02-17 07:47:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:05,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:05,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:05,362 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) [2023-02-17 07:47:05,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 07:47:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:47:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 07:47:05,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:47:05,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 07:47:05,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122469592] [2023-02-17 07:47:05,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63398282] [2023-02-17 07:47:05,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63398282] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 07:47:05,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:47:05,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-17 07:47:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883593698] [2023-02-17 07:47:05,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:47:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:47:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:47:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:47:05,478 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:05,653 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-02-17 07:47:05,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:47:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-02-17 07:47:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:05,654 INFO L225 Difference]: With dead ends: 78 [2023-02-17 07:47:05,654 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 07:47:05,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:47:05,655 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:05,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:47:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 07:47:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-17 07:47:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 07:47:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2023-02-17 07:47:05,669 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 21 [2023-02-17 07:47:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:05,669 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2023-02-17 07:47:05,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 07:47:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2023-02-17 07:47:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 07:47:05,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:05,671 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:05,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 07:47:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:05,876 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2023-02-17 07:47:05,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:05,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784000645] [2023-02-17 07:47:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:05,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:05,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:05,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133083205] [2023-02-17 07:47:05,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:47:05,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:05,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:05,895 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) [2023-02-17 07:47:05,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 07:47:05,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:47:05,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:47:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 07:47:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:47:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:47:05,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:47:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 07:47:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:47:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784000645] [2023-02-17 07:47:05,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:47:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133083205] [2023-02-17 07:47:05,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133083205] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:47:05,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:47:05,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2023-02-17 07:47:05,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580176944] [2023-02-17 07:47:05,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:47:05,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 07:47:05,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:47:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 07:47:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-17 07:47:05,991 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-17 07:47:06,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:47:06,027 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2023-02-17 07:47:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 07:47:06,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 46 [2023-02-17 07:47:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:47:06,028 INFO L225 Difference]: With dead ends: 77 [2023-02-17 07:47:06,028 INFO L226 Difference]: Without dead ends: 69 [2023-02-17 07:47:06,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:47:06,030 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:47:06,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 115 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:47:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-17 07:47:06,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-17 07:47:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.309090909090909) internal successors, (72), 56 states have internal predecessors, (72), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:47:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-02-17 07:47:06,046 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 46 [2023-02-17 07:47:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:47:06,047 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-02-17 07:47:06,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-17 07:47:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-02-17 07:47:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 07:47:06,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:47:06,053 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:06,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:06,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 07:47:06,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:47:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:47:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 513765689, now seen corresponding path program 3 times [2023-02-17 07:47:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:47:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653438483] [2023-02-17 07:47:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:47:06,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:47:06,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:47:06,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543655540] [2023-02-17 07:47:06,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:47:06,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:47:06,284 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) [2023-02-17 07:47:06,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 07:47:06,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 07:47:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-02-17 07:47:06,349 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-17 07:47:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-17 07:47:06,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-17 07:47:06,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-17 07:47:06,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 07:47:06,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 07:47:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:47:06,604 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2023-02-17 07:47:06,606 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 07:47:06,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 07:47:06 BoogieIcfgContainer [2023-02-17 07:47:06,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 07:47:06,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 07:47:06,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 07:47:06,632 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 07:47:06,632 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:47:01" (3/4) ... [2023-02-17 07:47:06,633 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-17 07:47:06,676 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-17 07:47:06,676 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 07:47:06,677 INFO L158 Benchmark]: Toolchain (without parser) took 5293.71ms. Allocated memory was 159.4MB in the beginning and 228.6MB in the end (delta: 69.2MB). Free memory was 110.9MB in the beginning and 145.1MB in the end (delta: -34.3MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. [2023-02-17 07:47:06,677 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 07:47:06,677 INFO L158 Benchmark]: CACSL2BoogieTranslator took 144.23ms. Allocated memory is still 159.4MB. Free memory was 110.9MB in the beginning and 100.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 07:47:06,677 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.25ms. Allocated memory is still 159.4MB. Free memory was 100.4MB in the beginning and 98.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 07:47:06,678 INFO L158 Benchmark]: Boogie Preprocessor took 16.22ms. Allocated memory is still 159.4MB. Free memory was 98.9MB in the beginning and 97.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 07:47:06,678 INFO L158 Benchmark]: RCFGBuilder took 214.67ms. Allocated memory is still 159.4MB. Free memory was 97.6MB in the beginning and 85.7MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 07:47:06,678 INFO L158 Benchmark]: TraceAbstraction took 4847.90ms. Allocated memory was 159.4MB in the beginning and 228.6MB in the end (delta: 69.2MB). Free memory was 85.0MB in the beginning and 148.3MB in the end (delta: -63.3MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2023-02-17 07:47:06,678 INFO L158 Benchmark]: Witness Printer took 44.88ms. Allocated memory is still 228.6MB. Free memory was 148.3MB in the beginning and 145.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-17 07:47:06,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 109.1MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 144.23ms. Allocated memory is still 159.4MB. Free memory was 110.9MB in the beginning and 100.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.25ms. Allocated memory is still 159.4MB. Free memory was 100.4MB in the beginning and 98.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.22ms. Allocated memory is still 159.4MB. Free memory was 98.9MB in the beginning and 97.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 214.67ms. Allocated memory is still 159.4MB. Free memory was 97.6MB in the beginning and 85.7MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4847.90ms. Allocated memory was 159.4MB in the beginning and 228.6MB in the end (delta: 69.2MB). Free memory was 85.0MB in the beginning and 148.3MB in the end (delta: -63.3MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * Witness Printer took 44.88ms. Allocated memory is still 228.6MB. Free memory was 148.3MB in the beginning and 145.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=64, b=64, counter=0, p=1, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=64, b=64, counter=1, counter++=0, p=1, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=64, b=64, counter=1, p=1, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=64, b=64, counter=1, p=1, q=0, x=64, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=32, b=32, counter=1, p=4, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=32, b=32, counter=2, counter++=1, p=4, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=32, b=32, counter=2, p=4, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=32, b=32, counter=2, p=4, q=0, x=64, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=16, b=16, counter=2, p=16, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=16, b=16, counter=3, counter++=2, p=16, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=16, b=16, counter=3, p=16, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=16, b=16, counter=3, p=16, q=0, x=64, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=8, b=8, counter=3, p=64, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=8, b=8, counter=4, counter++=3, p=64, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=8, b=8, counter=4, p=64, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=8, b=8, counter=4, p=64, q=0, x=64, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=4, b=4, counter=4, p=256, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=4, b=4, counter=5, counter++=4, p=256, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=4, counter=5, p=256, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=4, b=4, counter=5, p=256, q=0, x=64, y=64] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2, b=2, counter=5, p=1024, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=2, b=2, counter=6, counter++=5, p=1024, q=0, x=64, y=64] [L33] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 319 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 319 mSDsluCounter, 609 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 431 mSDsCounter, 92 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 614 IncrementalHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 92 mSolverCounterUnsat, 178 mSDtfsCounter, 614 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=5, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 51 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 224 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 258 ConstructedInterpolants, 2 QuantifiedInterpolants, 1764 SizeOfPredicates, 38 NumberOfNonLiveVariables, 645 ConjunctsInSsa, 107 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 66/178 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! [2023-02-17 07:47:06,699 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