./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_unwindbound100.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 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 05:19:52,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 05:19:52,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 05:19:52,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 05:19:52,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 05:19:52,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 05:19:52,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 05:19:52,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 05:19:52,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 05:19:52,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 05:19:52,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 05:19:52,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 05:19:52,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 05:19:52,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 05:19:52,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 05:19:52,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 05:19:52,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 05:19:52,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 05:19:52,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 05:19:52,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 05:19:52,321 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 05:19:52,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 05:19:52,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 05:19:52,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 05:19:52,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 05:19:52,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 05:19:52,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 05:19:52,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 05:19:52,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 05:19:52,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 05:19:52,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 05:19:52,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 05:19:52,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 05:19:52,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 05:19:52,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 05:19:52,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 05:19:52,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 05:19:52,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 05:19:52,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 05:19:52,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 05:19:52,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 05:19:52,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 05:19:52,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 05:19:52,363 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 05:19:52,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 05:19:52,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 05:19:52,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 05:19:52,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 05:19:52,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 05:19:52,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 05:19:52,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 05:19:52,365 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 05:19:52,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 05:19:52,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 05:19:52,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 05:19:52,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 05:19:52,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 05:19:52,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 05:19:52,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 05:19:52,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 05:19:52,367 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 05:19:52,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 05:19:52,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 05:19:52,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 05:19:52,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 05:19:52,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 05:19:52,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 05:19:52,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 05:19:52,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 05:19:52,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 05:19:52,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 05:19:52,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 05:19:52,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 05:19:52,369 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 05:19:52,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 05:19:52,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 05:19:52,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 [2022-07-12 05:19:52,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 05:19:52,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 05:19:52,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 05:19:52,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 05:19:52,594 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 05:19:52,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-07-12 05:19:52,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef29eb55b/0ace62d76f2d4e10b8a4131f277e9778/FLAGa99caa3f0 [2022-07-12 05:19:52,954 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 05:19:52,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-07-12 05:19:52,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef29eb55b/0ace62d76f2d4e10b8a4131f277e9778/FLAGa99caa3f0 [2022-07-12 05:19:53,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef29eb55b/0ace62d76f2d4e10b8a4131f277e9778 [2022-07-12 05:19:53,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 05:19:53,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 05:19:53,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 05:19:53,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 05:19:53,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 05:19:53,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1a1696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53, skipping insertion in model container [2022-07-12 05:19:53,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 05:19:53,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 05:19:53,525 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_unwindbound100.c[524,537] [2022-07-12 05:19:53,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 05:19:53,549 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 05:19:53,558 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_unwindbound100.c[524,537] [2022-07-12 05:19:53,566 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 05:19:53,575 INFO L208 MainTranslator]: Completed translation [2022-07-12 05:19:53,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53 WrapperNode [2022-07-12 05:19:53,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 05:19:53,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 05:19:53,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 05:19:53,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 05:19:53,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,619 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-12 05:19:53,619 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 05:19:53,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 05:19:53,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 05:19:53,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 05:19:53,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 05:19:53,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 05:19:53,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 05:19:53,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 05:19:53,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (1/1) ... [2022-07-12 05:19:53,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 05:19:53,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:53,663 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) [2022-07-12 05:19:53,679 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 [2022-07-12 05:19:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 05:19:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 05:19:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 05:19:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 05:19:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-12 05:19:53,692 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-12 05:19:53,737 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 05:19:53,738 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 05:19:53,831 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 05:19:53,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 05:19:53,836 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 05:19:53,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 05:19:53 BoogieIcfgContainer [2022-07-12 05:19:53,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 05:19:53,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 05:19:53,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 05:19:53,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 05:19:53,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 05:19:53" (1/3) ... [2022-07-12 05:19:53,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7433d108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 05:19:53, skipping insertion in model container [2022-07-12 05:19:53,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 05:19:53" (2/3) ... [2022-07-12 05:19:53,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7433d108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 05:19:53, skipping insertion in model container [2022-07-12 05:19:53,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 05:19:53" (3/3) ... [2022-07-12 05:19:53,843 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2022-07-12 05:19:53,852 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 05:19:53,852 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 05:19:53,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 05:19:53,885 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@61a53852, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f6dc8b4 [2022-07-12 05:19:53,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 05:19:53,889 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) [2022-07-12 05:19:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 05:19:53,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:53,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:19:53,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2022-07-12 05:19:53,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:53,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049808338] [2022-07-12 05:19:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:53,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:53,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:53,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049808338] [2022-07-12 05:19:53,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049808338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 05:19:53,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 05:19:53,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 05:19:53,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614242278] [2022-07-12 05:19:53,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:19:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 05:19:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 05:19:54,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 05:19:54,014 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) [2022-07-12 05:19:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:54,030 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-07-12 05:19:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 05:19:54,033 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 [2022-07-12 05:19:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:54,039 INFO L225 Difference]: With dead ends: 43 [2022-07-12 05:19:54,039 INFO L226 Difference]: Without dead ends: 19 [2022-07-12 05:19:54,042 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 [2022-07-12 05:19:54,045 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 [2022-07-12 05:19:54,046 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] [2022-07-12 05:19:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-12 05:19:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-12 05:19:54,072 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) [2022-07-12 05:19:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-07-12 05:19:54,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2022-07-12 05:19:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:54,075 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-07-12 05:19:54,075 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) [2022-07-12 05:19:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-07-12 05:19:54,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 05:19:54,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:54,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:19:54,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 05:19:54,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2022-07-12 05:19:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:54,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11027437] [2022-07-12 05:19:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:54,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:54,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11027437] [2022-07-12 05:19:54,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11027437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 05:19:54,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 05:19:54,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 05:19:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988576165] [2022-07-12 05:19:54,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:19:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 05:19:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 05:19:54,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 05:19:54,185 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) [2022-07-12 05:19:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:54,203 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-07-12 05:19:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 05:19:54,204 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 [2022-07-12 05:19:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:54,204 INFO L225 Difference]: With dead ends: 29 [2022-07-12 05:19:54,204 INFO L226 Difference]: Without dead ends: 21 [2022-07-12 05:19:54,205 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 [2022-07-12 05:19:54,206 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 [2022-07-12 05:19:54,206 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] [2022-07-12 05:19:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-12 05:19:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-12 05:19:54,223 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) [2022-07-12 05:19:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-07-12 05:19:54,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2022-07-12 05:19:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:54,225 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-07-12 05:19:54,225 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) [2022-07-12 05:19:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-07-12 05:19:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 05:19:54,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:54,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:19:54,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 05:19:54,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2022-07-12 05:19:54,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:54,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787254949] [2022-07-12 05:19:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:54,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:19:54,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482346621] [2022-07-12 05:19:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:54,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:19:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:54,295 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) [2022-07-12 05:19:54,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 05:19:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:54,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 05:19:54,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:19:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:54,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 05:19:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787254949] [2022-07-12 05:19:54,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:19:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482346621] [2022-07-12 05:19:54,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482346621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 05:19:54,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 05:19:54,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 05:19:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973075184] [2022-07-12 05:19:54,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:19:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 05:19:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:54,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 05:19:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 05:19:54,489 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) [2022-07-12 05:19:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:54,562 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-07-12 05:19:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 05:19:54,563 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 [2022-07-12 05:19:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:54,563 INFO L225 Difference]: With dead ends: 34 [2022-07-12 05:19:54,563 INFO L226 Difference]: Without dead ends: 32 [2022-07-12 05:19:54,564 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 [2022-07-12 05:19:54,565 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-07-12 05:19:54,565 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] [2022-07-12 05:19:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-12 05:19:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-07-12 05:19:54,583 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) [2022-07-12 05:19:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-12 05:19:54,584 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2022-07-12 05:19:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:54,585 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-12 05:19:54,585 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) [2022-07-12 05:19:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-12 05:19:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 05:19:54,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:54,586 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:19:54,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 05:19:54,786 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 [2022-07-12 05:19:54,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2022-07-12 05:19:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832138367] [2022-07-12 05:19:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:54,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:19:54,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219078314] [2022-07-12 05:19:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:54,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:19:54,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:54,797 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) [2022-07-12 05:19:54,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 05:19:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 05:19:54,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:19:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:55,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:19:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:55,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:55,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832138367] [2022-07-12 05:19:55,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:19:55,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219078314] [2022-07-12 05:19:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219078314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 05:19:55,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 05:19:55,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-07-12 05:19:55,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149299069] [2022-07-12 05:19:55,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 05:19:55,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 05:19:55,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 05:19:55,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-12 05:19:55,307 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) [2022-07-12 05:19:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:55,627 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-07-12 05:19:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 05:19:55,628 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 [2022-07-12 05:19:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:55,630 INFO L225 Difference]: With dead ends: 47 [2022-07-12 05:19:55,630 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 05:19:55,630 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 [2022-07-12 05:19:55,631 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-12 05:19:55,631 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] [2022-07-12 05:19:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 05:19:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-07-12 05:19:55,636 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) [2022-07-12 05:19:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-07-12 05:19:55,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2022-07-12 05:19:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:55,637 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-07-12 05:19:55,637 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) [2022-07-12 05:19:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-07-12 05:19:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 05:19:55,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:55,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:19:55,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 05:19:55,838 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 [2022-07-12 05:19:55,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2022-07-12 05:19:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:55,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781873622] [2022-07-12 05:19:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:55,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:19:55,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155491720] [2022-07-12 05:19:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:55,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:19:55,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:55,861 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) [2022-07-12 05:19:55,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 05:19:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 05:19:55,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:19:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:55,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:19:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:55,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781873622] [2022-07-12 05:19:55,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:19:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155491720] [2022-07-12 05:19:55,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155491720] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 05:19:55,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 05:19:55,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-12 05:19:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685669779] [2022-07-12 05:19:55,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 05:19:55,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 05:19:55,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 05:19:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-12 05:19:55,986 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) [2022-07-12 05:19:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:56,038 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-12 05:19:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 05:19:56,039 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 [2022-07-12 05:19:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:56,040 INFO L225 Difference]: With dead ends: 95 [2022-07-12 05:19:56,040 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 05:19:56,040 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 [2022-07-12 05:19:56,041 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 05:19:56,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 124 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 05:19:56,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 05:19:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-07-12 05:19:56,050 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) [2022-07-12 05:19:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-07-12 05:19:56,052 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2022-07-12 05:19:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:56,052 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-07-12 05:19:56,052 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) [2022-07-12 05:19:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-07-12 05:19:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 05:19:56,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:56,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:19:56,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 05:19:56,267 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 [2022-07-12 05:19:56,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2022-07-12 05:19:56,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:56,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26582944] [2022-07-12 05:19:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:56,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:56,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:19:56,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558109354] [2022-07-12 05:19:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:56,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:19:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:56,302 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) [2022-07-12 05:19:56,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 05:19:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:56,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 05:19:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:19:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:57,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:19:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:19:57,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:57,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26582944] [2022-07-12 05:19:57,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:19:57,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558109354] [2022-07-12 05:19:57,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558109354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 05:19:57,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 05:19:57,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-07-12 05:19:57,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012173231] [2022-07-12 05:19:57,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 05:19:57,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 05:19:57,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 05:19:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-12 05:19:57,639 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) [2022-07-12 05:19:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:58,741 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2022-07-12 05:19:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 05:19:58,742 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 [2022-07-12 05:19:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:58,743 INFO L225 Difference]: With dead ends: 120 [2022-07-12 05:19:58,743 INFO L226 Difference]: Without dead ends: 114 [2022-07-12 05:19:58,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-07-12 05:19:58,744 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 05:19:58,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 80 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 05:19:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-12 05:19:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2022-07-12 05:19:58,772 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) [2022-07-12 05:19:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-07-12 05:19:58,776 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2022-07-12 05:19:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:58,776 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-07-12 05:19:58,776 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) [2022-07-12 05:19:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-07-12 05:19:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 05:19:58,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:58,777 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:19:58,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 05:19:58,981 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 [2022-07-12 05:19:58,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:58,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2022-07-12 05:19:58,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:58,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934108751] [2022-07-12 05:19:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:58,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:59,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:19:59,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064780825] [2022-07-12 05:19:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:59,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:19:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:59,028 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) [2022-07-12 05:19:59,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 05:19:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 05:19:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:19:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 05:19:59,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 05:19:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934108751] [2022-07-12 05:19:59,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:19:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064780825] [2022-07-12 05:19:59,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064780825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 05:19:59,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 05:19:59,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 05:19:59,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641175560] [2022-07-12 05:19:59,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:19:59,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 05:19:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 05:19:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 05:19:59,109 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) [2022-07-12 05:19:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:59,228 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-07-12 05:19:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 05:19:59,228 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 [2022-07-12 05:19:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:59,230 INFO L225 Difference]: With dead ends: 108 [2022-07-12 05:19:59,230 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 05:19:59,230 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 [2022-07-12 05:19:59,232 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 [2022-07-12 05:19:59,232 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] [2022-07-12 05:19:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 05:19:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-07-12 05:19:59,258 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) [2022-07-12 05:19:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2022-07-12 05:19:59,261 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 21 [2022-07-12 05:19:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:59,262 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2022-07-12 05:19:59,262 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) [2022-07-12 05:19:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2022-07-12 05:19:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 05:19:59,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:59,263 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] [2022-07-12 05:19:59,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 05:19:59,480 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 [2022-07-12 05:19:59,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1954557947, now seen corresponding path program 1 times [2022-07-12 05:19:59,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:59,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372143674] [2022-07-12 05:19:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:59,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:59,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:19:59,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251041915] [2022-07-12 05:19:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:59,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:19:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:59,498 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) [2022-07-12 05:19:59,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 05:19:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 05:19:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:19:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 05:19:59,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 05:19:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:59,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372143674] [2022-07-12 05:19:59,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:19:59,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251041915] [2022-07-12 05:19:59,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251041915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 05:19:59,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 05:19:59,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 05:19:59,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149786957] [2022-07-12 05:19:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:19:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 05:19:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 05:19:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 05:19:59,571 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) [2022-07-12 05:19:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:19:59,617 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2022-07-12 05:19:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 05:19:59,618 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 [2022-07-12 05:19:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:19:59,619 INFO L225 Difference]: With dead ends: 133 [2022-07-12 05:19:59,619 INFO L226 Difference]: Without dead ends: 121 [2022-07-12 05:19:59,619 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 [2022-07-12 05:19:59,619 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 [2022-07-12 05:19:59,620 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] [2022-07-12 05:19:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-12 05:19:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2022-07-12 05:19:59,630 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) [2022-07-12 05:19:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2022-07-12 05:19:59,630 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 32 [2022-07-12 05:19:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:19:59,631 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2022-07-12 05:19:59,631 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) [2022-07-12 05:19:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2022-07-12 05:19:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 05:19:59,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:19:59,632 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] [2022-07-12 05:19:59,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 05:19:59,847 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 [2022-07-12 05:19:59,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:19:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:19:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash 346264643, now seen corresponding path program 1 times [2022-07-12 05:19:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:19:59,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943616107] [2022-07-12 05:19:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:59,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:19:59,858 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:19:59,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305783966] [2022-07-12 05:19:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:19:59,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:19:59,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:19:59,859 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) [2022-07-12 05:19:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 05:19:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 05:19:59,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 05:19:59,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:19:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 05:19:59,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:19:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 05:19:59,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:19:59,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943616107] [2022-07-12 05:19:59,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:19:59,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305783966] [2022-07-12 05:19:59,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305783966] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 05:19:59,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 05:19:59,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-12 05:19:59,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42851980] [2022-07-12 05:19:59,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 05:19:59,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 05:19:59,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:19:59,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 05:19:59,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-12 05:19:59,992 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) [2022-07-12 05:20:00,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:20:00,128 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2022-07-12 05:20:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 05:20:00,129 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 [2022-07-12 05:20:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:20:00,129 INFO L225 Difference]: With dead ends: 112 [2022-07-12 05:20:00,130 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 05:20:00,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-12 05:20:00,130 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 05:20:00,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 05:20:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 05:20:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2022-07-12 05:20:00,136 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) [2022-07-12 05:20:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-12 05:20:00,137 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2022-07-12 05:20:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:20:00,137 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-12 05:20:00,137 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) [2022-07-12 05:20:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-12 05:20:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 05:20:00,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:20:00,138 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:20:00,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 05:20:00,355 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 [2022-07-12 05:20:00,356 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:20:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:20:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2022-07-12 05:20:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:20:00,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130019015] [2022-07-12 05:20:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:20:00,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:20:00,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:20:00,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181990894] [2022-07-12 05:20:00,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 05:20:00,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:20:00,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:20:00,364 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) [2022-07-12 05:20:00,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 05:20:00,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 05:20:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:20:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 05:20:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:20:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:20:00,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:20:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 05:20:00,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:20:00,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130019015] [2022-07-12 05:20:00,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:20:00,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181990894] [2022-07-12 05:20:00,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181990894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 05:20:00,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 05:20:00,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-12 05:20:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502657874] [2022-07-12 05:20:00,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 05:20:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 05:20:00,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:20:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 05:20:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-12 05:20:00,615 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) [2022-07-12 05:20:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:20:00,787 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2022-07-12 05:20:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 05:20:00,787 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 [2022-07-12 05:20:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:20:00,788 INFO L225 Difference]: With dead ends: 132 [2022-07-12 05:20:00,788 INFO L226 Difference]: Without dead ends: 124 [2022-07-12 05:20:00,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-12 05:20:00,789 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 [2022-07-12 05:20:00,790 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] [2022-07-12 05:20:00,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-12 05:20:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-12 05:20:00,804 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) [2022-07-12 05:20:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-07-12 05:20:00,805 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 46 [2022-07-12 05:20:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:20:00,806 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-07-12 05:20:00,806 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) [2022-07-12 05:20:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-07-12 05:20:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 05:20:00,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:20:00,808 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:20:00,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 05:20:01,036 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 [2022-07-12 05:20:01,037 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:20:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:20:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1689445411, now seen corresponding path program 3 times [2022-07-12 05:20:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:20:01,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271506601] [2022-07-12 05:20:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:20:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:20:01,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:20:01,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177068579] [2022-07-12 05:20:01,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 05:20:01,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:20:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:20:01,046 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) [2022-07-12 05:20:01,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 05:20:01,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 05:20:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:20:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 05:20:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:20:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:20:01,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:20:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-12 05:20:01,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:20:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271506601] [2022-07-12 05:20:01,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:20:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177068579] [2022-07-12 05:20:01,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177068579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 05:20:01,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 05:20:01,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-12 05:20:01,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668522870] [2022-07-12 05:20:01,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 05:20:01,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 05:20:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:20:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 05:20:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-12 05:20:01,621 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) [2022-07-12 05:20:01,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:20:01,960 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2022-07-12 05:20:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-12 05:20:01,961 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 [2022-07-12 05:20:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:20:01,962 INFO L225 Difference]: With dead ends: 264 [2022-07-12 05:20:01,962 INFO L226 Difference]: Without dead ends: 256 [2022-07-12 05:20:01,963 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 [2022-07-12 05:20:01,963 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 [2022-07-12 05:20:01,963 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] [2022-07-12 05:20:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-12 05:20:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-07-12 05:20:01,978 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) [2022-07-12 05:20:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 323 transitions. [2022-07-12 05:20:01,979 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 323 transitions. Word has length 100 [2022-07-12 05:20:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:20:01,979 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 323 transitions. [2022-07-12 05:20:01,979 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) [2022-07-12 05:20:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 323 transitions. [2022-07-12 05:20:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-12 05:20:01,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:20:01,982 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:20:01,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 05:20:02,187 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 [2022-07-12 05:20:02,187 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:20:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:20:02,188 INFO L85 PathProgramCache]: Analyzing trace with hash 482330845, now seen corresponding path program 4 times [2022-07-12 05:20:02,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:20:02,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932977783] [2022-07-12 05:20:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:20:02,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:20:02,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:20:02,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212240694] [2022-07-12 05:20:02,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 05:20:02,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:20:02,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:20:02,216 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) [2022-07-12 05:20:02,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 05:20:02,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 05:20:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:20:02,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 05:20:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:20:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:20:02,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:20:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-07-12 05:20:03,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:20:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932977783] [2022-07-12 05:20:03,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:20:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212240694] [2022-07-12 05:20:03,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212240694] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 05:20:03,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 05:20:03,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-07-12 05:20:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732637420] [2022-07-12 05:20:03,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 05:20:03,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 05:20:03,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:20:03,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 05:20:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 05:20:03,508 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) [2022-07-12 05:20:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:20:04,824 INFO L93 Difference]: Finished difference Result 528 states and 691 transitions. [2022-07-12 05:20:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-12 05:20:04,824 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 [2022-07-12 05:20:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:20:04,828 INFO L225 Difference]: With dead ends: 528 [2022-07-12 05:20:04,828 INFO L226 Difference]: Without dead ends: 520 [2022-07-12 05:20:04,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-07-12 05:20:04,831 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 [2022-07-12 05:20:04,831 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] [2022-07-12 05:20:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-07-12 05:20:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-07-12 05:20:04,853 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) [2022-07-12 05:20:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 659 transitions. [2022-07-12 05:20:04,855 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 659 transitions. Word has length 208 [2022-07-12 05:20:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:20:04,855 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 659 transitions. [2022-07-12 05:20:04,856 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) [2022-07-12 05:20:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 659 transitions. [2022-07-12 05:20:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-07-12 05:20:04,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:20:04,860 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:20:04,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 05:20:05,078 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 [2022-07-12 05:20:05,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:20:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:20:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1031888163, now seen corresponding path program 5 times [2022-07-12 05:20:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:20:05,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657324742] [2022-07-12 05:20:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:20:05,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:20:05,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:20:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643890516] [2022-07-12 05:20:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 05:20:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:20:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:20:05,105 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) [2022-07-12 05:20:05,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 05:20:08,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-12 05:20:08,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 05:20:08,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-12 05:20:08,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 05:20:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 05:20:09,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 05:20:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9499 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-07-12 05:20:11,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 05:20:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657324742] [2022-07-12 05:20:11,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-12 05:20:11,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643890516] [2022-07-12 05:20:11,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643890516] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 05:20:11,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 05:20:11,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2022-07-12 05:20:11,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395373649] [2022-07-12 05:20:11,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 05:20:11,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-12 05:20:11,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 05:20:11,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-12 05:20:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 05:20:11,806 INFO L87 Difference]: Start difference. First operand 520 states and 659 transitions. Second operand has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-12 05:20:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 05:20:16,572 INFO L93 Difference]: Finished difference Result 1056 states and 1387 transitions. [2022-07-12 05:20:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-07-12 05:20:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Word has length 424 [2022-07-12 05:20:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 05:20:16,576 INFO L225 Difference]: With dead ends: 1056 [2022-07-12 05:20:16,576 INFO L226 Difference]: Without dead ends: 1048 [2022-07-12 05:20:16,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-07-12 05:20:16,583 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 3026 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3026 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 05:20:16,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3026 Valid, 1225 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 05:20:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-07-12 05:20:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1048. [2022-07-12 05:20:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 856 states have (on average 1.3317757009345794) internal successors, (1140), 857 states have internal predecessors, (1140), 96 states have call successors, (96), 95 states have call predecessors, (96), 95 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-07-12 05:20:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1331 transitions. [2022-07-12 05:20:16,629 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1331 transitions. Word has length 424 [2022-07-12 05:20:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 05:20:16,630 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 1331 transitions. [2022-07-12 05:20:16,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.346938775510204) internal successors, (524), 98 states have internal predecessors, (524), 93 states have call successors, (93), 48 states have call predecessors, (93), 47 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-12 05:20:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1331 transitions. [2022-07-12 05:20:16,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2022-07-12 05:20:16,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 05:20:16,645 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 05:20:16,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 05:20:16,856 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 [2022-07-12 05:20:16,856 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 05:20:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 05:20:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1549948637, now seen corresponding path program 6 times [2022-07-12 05:20:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 05:20:16,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326113818] [2022-07-12 05:20:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 05:20:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 05:20:16,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-12 05:20:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876450285] [2022-07-12 05:20:16,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 05:20:16,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 05:20:16,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 05:20:16,896 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) [2022-07-12 05:20:16,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process