./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_unwindbound50.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 07777b75ead5ca82f9efe60a3e787c338f0f6d537d953087b187c05d2a960d83 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 04:04:08,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 04:04:08,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 04:04:08,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 04:04:08,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 04:04:08,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 04:04:08,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 04:04:08,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 04:04:08,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 04:04:08,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 04:04:08,381 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 04:04:08,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 04:04:08,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 04:04:08,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 04:04:08,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 04:04:08,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 04:04:08,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 04:04:08,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 04:04:08,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 04:04:08,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 04:04:08,408 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 04:04:08,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 04:04:08,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 04:04:08,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 04:04:08,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 04:04:08,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 04:04:08,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 04:04:08,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 04:04:08,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 04:04:08,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 04:04:08,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 04:04:08,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 04:04:08,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 04:04:08,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 04:04:08,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 04:04:08,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 04:04:08,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 04:04:08,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 04:04:08,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 04:04:08,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 04:04:08,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 04:04:08,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 04:04:08,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 04:04:08,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 04:04:08,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 04:04:08,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 04:04:08,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 04:04:08,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 04:04:08,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 04:04:08,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 04:04:08,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 04:04:08,475 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 04:04:08,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 04:04:08,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 04:04:08,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 04:04:08,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 04:04:08,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 04:04:08,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 04:04:08,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 04:04:08,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 04:04:08,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 04:04:08,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 04:04:08,479 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 04:04:08,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 04:04:08,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 04:04:08,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 04:04:08,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 04:04:08,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 04:04:08,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 04:04:08,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 04:04:08,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 04:04:08,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 04:04:08,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 04:04:08,481 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 04:04:08,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 04:04:08,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 04:04:08,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07777b75ead5ca82f9efe60a3e787c338f0f6d537d953087b187c05d2a960d83 [2022-07-21 04:04:08,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 04:04:08,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 04:04:08,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 04:04:08,852 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 04:04:08,852 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 04:04:08,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-07-21 04:04:08,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eec1bfe2/cece26ca10834f0e8c6b5f75013b5a8e/FLAG5ef5f8f27 [2022-07-21 04:04:09,305 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 04:04:09,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-07-21 04:04:09,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eec1bfe2/cece26ca10834f0e8c6b5f75013b5a8e/FLAG5ef5f8f27 [2022-07-21 04:04:09,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eec1bfe2/cece26ca10834f0e8c6b5f75013b5a8e [2022-07-21 04:04:09,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 04:04:09,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 04:04:09,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 04:04:09,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 04:04:09,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 04:04:09,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:09,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475ab7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09, skipping insertion in model container [2022-07-21 04:04:09,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:09,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 04:04:09,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 04:04:09,872 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound50.c[524,537] [2022-07-21 04:04:09,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 04:04:09,897 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 04:04:09,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound50.c[524,537] [2022-07-21 04:04:09,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 04:04:09,969 INFO L208 MainTranslator]: Completed translation [2022-07-21 04:04:09,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09 WrapperNode [2022-07-21 04:04:09,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 04:04:09,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 04:04:09,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 04:04:09,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 04:04:09,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:09,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,014 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-21 04:04:10,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 04:04:10,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 04:04:10,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 04:04:10,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 04:04:10,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 04:04:10,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 04:04:10,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 04:04:10,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 04:04:10,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (1/1) ... [2022-07-21 04:04:10,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 04:04:10,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:10,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 04:04:10,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 04:04:10,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 04:04:10,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 04:04:10,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 04:04:10,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 04:04:10,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 04:04:10,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 04:04:10,187 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 04:04:10,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 04:04:10,325 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 04:04:10,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 04:04:10,330 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 04:04:10,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:04:10 BoogieIcfgContainer [2022-07-21 04:04:10,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 04:04:10,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 04:04:10,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 04:04:10,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 04:04:10,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:04:09" (1/3) ... [2022-07-21 04:04:10,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df12d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:04:10, skipping insertion in model container [2022-07-21 04:04:10,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:04:09" (2/3) ... [2022-07-21 04:04:10,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df12d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:04:10, skipping insertion in model container [2022-07-21 04:04:10,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:04:10" (3/3) ... [2022-07-21 04:04:10,340 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound50.c [2022-07-21 04:04:10,351 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 04:04:10,352 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 04:04:10,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 04:04:10,407 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76ce4581, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7b2b518b [2022-07-21 04:04:10,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 04:04:10,414 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) [2022-07-21 04:04:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 04:04:10,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:10,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:10,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2022-07-21 04:04:10,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:10,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542965201] [2022-07-21 04:04:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:10,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:10,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542965201] [2022-07-21 04:04:10,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542965201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:04:10,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:04:10,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 04:04:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590502251] [2022-07-21 04:04:10,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:04:10,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 04:04:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 04:04:10,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 04:04:10,620 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) [2022-07-21 04:04:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:10,637 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-07-21 04:04:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 04:04:10,639 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 [2022-07-21 04:04:10,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:10,646 INFO L225 Difference]: With dead ends: 43 [2022-07-21 04:04:10,647 INFO L226 Difference]: Without dead ends: 19 [2022-07-21 04:04:10,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 04:04:10,654 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 [2022-07-21 04:04:10,655 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] [2022-07-21 04:04:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-21 04:04:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-21 04:04:10,692 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) [2022-07-21 04:04:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-07-21 04:04:10,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2022-07-21 04:04:10,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:10,695 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-07-21 04:04:10,696 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) [2022-07-21 04:04:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-07-21 04:04:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 04:04:10,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:10,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:10,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 04:04:10,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:10,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:10,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2022-07-21 04:04:10,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:10,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689612106] [2022-07-21 04:04:10,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:10,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:10,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689612106] [2022-07-21 04:04:10,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689612106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:04:10,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:04:10,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 04:04:10,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817292429] [2022-07-21 04:04:10,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:04:10,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 04:04:10,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:10,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 04:04:10,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 04:04:10,793 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) [2022-07-21 04:04:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:10,807 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-07-21 04:04:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 04:04:10,813 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 [2022-07-21 04:04:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:10,814 INFO L225 Difference]: With dead ends: 29 [2022-07-21 04:04:10,814 INFO L226 Difference]: Without dead ends: 21 [2022-07-21 04:04:10,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 04:04:10,816 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 [2022-07-21 04:04:10,816 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] [2022-07-21 04:04:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-21 04:04:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-21 04:04:10,823 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) [2022-07-21 04:04:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-07-21 04:04:10,844 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2022-07-21 04:04:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:10,845 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-21 04:04:10,845 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) [2022-07-21 04:04:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-07-21 04:04:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 04:04:10,846 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:10,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:10,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 04:04:10,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:10,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2022-07-21 04:04:10,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:10,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789302731] [2022-07-21 04:04:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:10,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311012552] [2022-07-21 04:04:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:10,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:10,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:10,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 04:04:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 04:04:10,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:11,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 04:04:11,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789302731] [2022-07-21 04:04:11,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:11,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311012552] [2022-07-21 04:04:11,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311012552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:04:11,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:04:11,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 04:04:11,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896871693] [2022-07-21 04:04:11,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:04:11,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 04:04:11,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:11,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 04:04:11,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 04:04:11,074 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-07-21 04:04:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:11,176 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-07-21 04:04:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 04:04:11,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2022-07-21 04:04:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:11,177 INFO L225 Difference]: With dead ends: 34 [2022-07-21 04:04:11,178 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 04:04:11,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 04:04:11,179 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:11,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:04:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 04:04:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-07-21 04:04:11,185 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) [2022-07-21 04:04:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-21 04:04:11,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2022-07-21 04:04:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:11,186 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-21 04:04:11,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-07-21 04:04:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-21 04:04:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 04:04:11,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:11,187 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:11,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:11,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:11,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2022-07-21 04:04:11,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332112698] [2022-07-21 04:04:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:11,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:11,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111538569] [2022-07-21 04:04:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:11,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:11,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:11,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 04:04:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 04:04:11,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:11,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:04:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:11,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332112698] [2022-07-21 04:04:11,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111538569] [2022-07-21 04:04:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111538569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:04:11,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:04:11,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-07-21 04:04:11,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271213798] [2022-07-21 04:04:11,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:04:11,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 04:04:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 04:04:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:04:11,841 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:12,244 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-07-21 04:04:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 04:04:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 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 [2022-07-21 04:04:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:12,247 INFO L225 Difference]: With dead ends: 47 [2022-07-21 04:04:12,247 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 04:04:12,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-21 04:04:12,249 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:12,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 83 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:04:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 04:04:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-07-21 04:04:12,256 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) [2022-07-21 04:04:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-07-21 04:04:12,257 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2022-07-21 04:04:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:12,257 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-07-21 04:04:12,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-07-21 04:04:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 04:04:12,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:12,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:12,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 04:04:12,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2022-07-21 04:04:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:12,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756262606] [2022-07-21 04:04:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:12,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:12,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591578013] [2022-07-21 04:04:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:12,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:12,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:12,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 04:04:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 04:04:12,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:12,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:04:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:12,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756262606] [2022-07-21 04:04:12,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591578013] [2022-07-21 04:04:12,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591578013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:04:12,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:04:12,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-21 04:04:12,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250531537] [2022-07-21 04:04:12,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:04:12,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 04:04:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 04:04:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 04:04:12,620 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) [2022-07-21 04:04:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:12,700 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-21 04:04:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 04:04:12,700 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 [2022-07-21 04:04:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:12,702 INFO L225 Difference]: With dead ends: 95 [2022-07-21 04:04:12,702 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 04:04:12,702 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 [2022-07-21 04:04:12,703 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:12,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 124 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:04:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 04:04:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-07-21 04:04:12,720 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) [2022-07-21 04:04:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-07-21 04:04:12,723 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2022-07-21 04:04:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:12,723 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-07-21 04:04:12,724 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) [2022-07-21 04:04:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-07-21 04:04:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 04:04:12,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:12,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:12,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:12,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:12,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:12,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2022-07-21 04:04:12,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539123138] [2022-07-21 04:04:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:12,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:12,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822803813] [2022-07-21 04:04:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:12,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:12,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:12,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:12,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 04:04:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:13,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 04:04:13,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:18,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:04:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:18,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539123138] [2022-07-21 04:04:18,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822803813] [2022-07-21 04:04:18,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822803813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:04:18,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:04:18,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-07-21 04:04:18,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965824011] [2022-07-21 04:04:18,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:04:18,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 04:04:18,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 04:04:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-21 04:04:18,879 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:20,427 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2022-07-21 04:04:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 04:04:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 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 [2022-07-21 04:04:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:20,430 INFO L225 Difference]: With dead ends: 120 [2022-07-21 04:04:20,430 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 04:04:20,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-07-21 04:04:20,431 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:20,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 80 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 04:04:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 04:04:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2022-07-21 04:04:20,445 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) [2022-07-21 04:04:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-07-21 04:04:20,446 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2022-07-21 04:04:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:20,447 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-07-21 04:04:20,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-07-21 04:04:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 04:04:20,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:20,448 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:20,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:20,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:20,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2022-07-21 04:04:20,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:20,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669410765] [2022-07-21 04:04:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:20,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:20,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:20,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289727224] [2022-07-21 04:04:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:20,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:20,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:20,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:20,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 04:04:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:20,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 04:04:20,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 04:04:20,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 04:04:20,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669410765] [2022-07-21 04:04:20,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:20,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289727224] [2022-07-21 04:04:20,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289727224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:04:20,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:04:20,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 04:04:20,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533105584] [2022-07-21 04:04:20,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:04:20,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 04:04:20,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 04:04:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 04:04:20,758 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:20,921 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-07-21 04:04:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 04:04:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-21 04:04:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:20,928 INFO L225 Difference]: With dead ends: 108 [2022-07-21 04:04:20,928 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 04:04:20,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 04:04:20,931 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:20,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 83 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:04:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 04:04:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-07-21 04:04:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 73 states have internal predecessors, (95), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:04:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2022-07-21 04:04:20,968 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 21 [2022-07-21 04:04:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:20,969 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2022-07-21 04:04:20,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2022-07-21 04:04:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 04:04:20,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:20,973 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:21,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:21,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:21,190 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:21,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1954557947, now seen corresponding path program 1 times [2022-07-21 04:04:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:21,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663632167] [2022-07-21 04:04:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:21,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:21,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482120532] [2022-07-21 04:04:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:21,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:21,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:21,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:21,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 04:04:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:21,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 04:04:21,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 04:04:21,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 04:04:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:21,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663632167] [2022-07-21 04:04:21,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:21,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482120532] [2022-07-21 04:04:21,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482120532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:04:21,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:04:21,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 04:04:21,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294032776] [2022-07-21 04:04:21,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:04:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 04:04:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 04:04:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 04:04:21,298 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:04:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:21,367 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2022-07-21 04:04:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 04:04:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-07-21 04:04:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:21,369 INFO L225 Difference]: With dead ends: 133 [2022-07-21 04:04:21,369 INFO L226 Difference]: Without dead ends: 121 [2022-07-21 04:04:21,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 04:04:21,370 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:21,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:04:21,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-21 04:04:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2022-07-21 04:04:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 84 states have internal predecessors, (107), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 04:04:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2022-07-21 04:04:21,401 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 32 [2022-07-21 04:04:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:21,401 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2022-07-21 04:04:21,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:04:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2022-07-21 04:04:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 04:04:21,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:21,403 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:21,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:21,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:21,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash 346264643, now seen corresponding path program 1 times [2022-07-21 04:04:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:21,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070845301] [2022-07-21 04:04:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:21,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:21,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:21,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018188009] [2022-07-21 04:04:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:21,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:21,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:21,634 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:21,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 04:04:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:04:21,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 04:04:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 04:04:21,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:04:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 04:04:21,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:21,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070845301] [2022-07-21 04:04:21,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018188009] [2022-07-21 04:04:21,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018188009] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 04:04:21,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:04:21,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-21 04:04:21,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383708002] [2022-07-21 04:04:21,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:04:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 04:04:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 04:04:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-21 04:04:21,824 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:22,019 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2022-07-21 04:04:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 04:04:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-07-21 04:04:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:22,021 INFO L225 Difference]: With dead ends: 112 [2022-07-21 04:04:22,021 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 04:04:22,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 04:04:22,022 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:22,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:04:22,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 04:04:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2022-07-21 04:04:22,029 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) [2022-07-21 04:04:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-21 04:04:22,030 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2022-07-21 04:04:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:22,030 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-21 04:04:22,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:04:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-21 04:04:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 04:04:22,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:22,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:22,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:22,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:22,254 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2022-07-21 04:04:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:22,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183562847] [2022-07-21 04:04:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:22,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:22,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:22,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753150955] [2022-07-21 04:04:22,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:04:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:22,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:22,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 04:04:22,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:04:22,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:04:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 04:04:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:22,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:04:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 04:04:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:22,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183562847] [2022-07-21 04:04:22,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:22,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753150955] [2022-07-21 04:04:22,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753150955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:04:22,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:04:22,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-21 04:04:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072529790] [2022-07-21 04:04:22,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:04:22,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 04:04:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 04:04:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:04:22,468 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 04:04:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:22,630 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2022-07-21 04:04:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 04:04:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 46 [2022-07-21 04:04:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:22,633 INFO L225 Difference]: With dead ends: 132 [2022-07-21 04:04:22,633 INFO L226 Difference]: Without dead ends: 124 [2022-07-21 04:04:22,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-21 04:04:22,634 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 129 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:22,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 196 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:04:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-21 04:04:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-21 04:04:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 101 states have internal predecessors, (132), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 04:04:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-07-21 04:04:22,655 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 46 [2022-07-21 04:04:22,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:22,656 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-07-21 04:04:22,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 04:04:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-07-21 04:04:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 04:04:22,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:22,663 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:22,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:22,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 04:04:22,880 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1689445411, now seen corresponding path program 3 times [2022-07-21 04:04:22,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:22,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551600570] [2022-07-21 04:04:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:22,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:22,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566554184] [2022-07-21 04:04:22,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 04:04:22,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:22,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:22,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:22,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 04:04:23,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-21 04:04:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:04:23,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 04:04:23,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:23,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:04:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-21 04:04:23,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551600570] [2022-07-21 04:04:23,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:23,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566554184] [2022-07-21 04:04:23,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566554184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:04:23,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:04:23,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-21 04:04:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719108445] [2022-07-21 04:04:23,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:04:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 04:04:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 04:04:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-21 04:04:23,620 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:04:24,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:24,047 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2022-07-21 04:04:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 04:04:24,048 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 100 [2022-07-21 04:04:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:24,050 INFO L225 Difference]: With dead ends: 264 [2022-07-21 04:04:24,050 INFO L226 Difference]: Without dead ends: 256 [2022-07-21 04:04:24,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 04:04:24,052 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 387 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:24,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 333 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:04:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-21 04:04:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-07-21 04:04:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 208 states have (on average 1.3269230769230769) internal successors, (276), 209 states have internal predecessors, (276), 24 states have call successors, (24), 23 states have call predecessors, (24), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-21 04:04:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 323 transitions. [2022-07-21 04:04:24,073 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 323 transitions. Word has length 100 [2022-07-21 04:04:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:24,074 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 323 transitions. [2022-07-21 04:04:24,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-21 04:04:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 323 transitions. [2022-07-21 04:04:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-21 04:04:24,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:24,077 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:24,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 04:04:24,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:24,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash 482330845, now seen corresponding path program 4 times [2022-07-21 04:04:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:24,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343488416] [2022-07-21 04:04:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:24,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:24,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679126129] [2022-07-21 04:04:24,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 04:04:24,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:24,300 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:24,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 04:04:24,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 04:04:24,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:04:24,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-21 04:04:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:04:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:04:24,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:04:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-07-21 04:04:25,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:04:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343488416] [2022-07-21 04:04:25,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:04:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679126129] [2022-07-21 04:04:25,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679126129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:04:25,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:04:25,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-07-21 04:04:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770047381] [2022-07-21 04:04:25,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:04:25,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 04:04:25,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:04:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 04:04:25,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 04:04:25,735 INFO L87 Difference]: Start difference. First operand 256 states and 323 transitions. Second operand has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-07-21 04:04:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:04:27,137 INFO L93 Difference]: Finished difference Result 528 states and 691 transitions. [2022-07-21 04:04:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-21 04:04:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 208 [2022-07-21 04:04:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:04:27,140 INFO L225 Difference]: With dead ends: 528 [2022-07-21 04:04:27,141 INFO L226 Difference]: Without dead ends: 520 [2022-07-21 04:04:27,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-07-21 04:04:27,143 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1344 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:04:27,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 628 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:04:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-21 04:04:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-07-21 04:04:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 424 states have (on average 1.330188679245283) internal successors, (564), 425 states have internal predecessors, (564), 48 states have call successors, (48), 47 states have call predecessors, (48), 47 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-07-21 04:04:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 659 transitions. [2022-07-21 04:04:27,189 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 659 transitions. Word has length 208 [2022-07-21 04:04:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:04:27,190 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 659 transitions. [2022-07-21 04:04:27,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-07-21 04:04:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 659 transitions. [2022-07-21 04:04:27,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-07-21 04:04:27,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:04:27,197 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:04:27,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-21 04:04:27,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 04:04:27,415 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:04:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:04:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1031888163, now seen corresponding path program 5 times [2022-07-21 04:04:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:04:27,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820507006] [2022-07-21 04:04:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:04:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:04:27,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:04:27,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060277412] [2022-07-21 04:04:27,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 04:04:27,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:04:27,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:04:27,462 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:04:27,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 04:05:31,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-21 04:05:31,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:05:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-21 04:05:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:05:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:05:32,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:05:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-07-21 04:05:32,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:05:32,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820507006] [2022-07-21 04:05:32,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:05:32,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060277412] [2022-07-21 04:05:32,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060277412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:05:32,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:05:32,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 54 [2022-07-21 04:05:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893669866] [2022-07-21 04:05:32,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:05:32,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-21 04:05:32,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:05:32,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-21 04:05:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-07-21 04:05:32,846 INFO L87 Difference]: Start difference. First operand 520 states and 659 transitions. Second operand has 54 states, 54 states have (on average 6.518518518518518) internal successors, (352), 54 states have internal predecessors, (352), 50 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 49 states have call predecessors, (92), 49 states have call successors, (92) [2022-07-21 04:05:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:05:34,231 INFO L93 Difference]: Finished difference Result 572 states and 727 transitions. [2022-07-21 04:05:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-07-21 04:05:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.518518518518518) internal successors, (352), 54 states have internal predecessors, (352), 50 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 49 states have call predecessors, (92), 49 states have call successors, (92) Word has length 424 [2022-07-21 04:05:34,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:05:34,239 INFO L225 Difference]: With dead ends: 572 [2022-07-21 04:05:34,239 INFO L226 Difference]: Without dead ends: 564 [2022-07-21 04:05:34,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 793 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3926, Invalid=6580, Unknown=0, NotChecked=0, Total=10506 [2022-07-21 04:05:34,245 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 954 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:05:34,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 697 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:05:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-21 04:05:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2022-07-21 04:05:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 460 states have (on average 1.3304347826086957) internal successors, (612), 461 states have internal predecessors, (612), 52 states have call successors, (52), 51 states have call predecessors, (52), 51 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-07-21 04:05:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 715 transitions. [2022-07-21 04:05:34,298 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 715 transitions. Word has length 424 [2022-07-21 04:05:34,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:05:34,299 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 715 transitions. [2022-07-21 04:05:34,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.518518518518518) internal successors, (352), 54 states have internal predecessors, (352), 50 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 49 states have call predecessors, (92), 49 states have call successors, (92) [2022-07-21 04:05:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 715 transitions. [2022-07-21 04:05:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-07-21 04:05:34,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:05:34,308 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:05:34,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 04:05:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 04:05:34,510 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:05:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:05:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1679937059, now seen corresponding path program 6 times [2022-07-21 04:05:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:05:34,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126732524] [2022-07-21 04:05:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:05:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:05:34,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:05:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485503876] [2022-07-21 04:05:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 04:05:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:05:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:05:34,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:05:34,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process