./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/loop-simple/nested_3.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 e63f4150318242871d0ac34a0d1b61fbf23907ae ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 04:41:16,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 04:41:16,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 04:41:16,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 04:41:16,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 04:41:16,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 04:41:16,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 04:41:16,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 04:41:16,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 04:41:16,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 04:41:16,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 04:41:16,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 04:41:16,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 04:41:16,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 04:41:16,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 04:41:16,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 04:41:16,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 04:41:16,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 04:41:16,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 04:41:16,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 04:41:16,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 04:41:16,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 04:41:16,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 04:41:16,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 04:41:16,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 04:41:16,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 04:41:16,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 04:41:16,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 04:41:16,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 04:41:16,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 04:41:16,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 04:41:16,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 04:41:16,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 04:41:16,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 04:41:16,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 04:41:16,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 04:41:16,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 04:41:16,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 04:41:16,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 04:41:16,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 04:41:16,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 04:41:16,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 04:41:16,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 04:41:16,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 04:41:16,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 04:41:16,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 04:41:16,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 04:41:16,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 04:41:16,379 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 04:41:16,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 04:41:16,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 04:41:16,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 04:41:16,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 04:41:16,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 04:41:16,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 04:41:16,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 04:41:16,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 04:41:16,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 04:41:16,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 04:41:16,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 04:41:16,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 04:41:16,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 04:41:16,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 04:41:16,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 04:41:16,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:41:16,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 04:41:16,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 04:41:16,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 04:41:16,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 04:41:16,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 04:41:16,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 04:41:16,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 04:41:16,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e63f4150318242871d0ac34a0d1b61fbf23907ae [2021-08-26 04:41:16,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 04:41:16,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 04:41:16,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 04:41:16,643 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 04:41:16,643 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 04:41:16,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_3.c [2021-08-26 04:41:16,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ffce5045/764975fd5bbd466d9491bc80317962f7/FLAG28cb828dc [2021-08-26 04:41:17,098 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 04:41:17,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_3.c [2021-08-26 04:41:17,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ffce5045/764975fd5bbd466d9491bc80317962f7/FLAG28cb828dc [2021-08-26 04:41:17,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ffce5045/764975fd5bbd466d9491bc80317962f7 [2021-08-26 04:41:17,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 04:41:17,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 04:41:17,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 04:41:17,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 04:41:17,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 04:41:17,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fff0c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17, skipping insertion in model container [2021-08-26 04:41:17,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 04:41:17,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 04:41:17,244 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-08-26 04:41:17,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:41:17,257 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 04:41:17,268 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_3.c[784,797] [2021-08-26 04:41:17,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:41:17,278 INFO L208 MainTranslator]: Completed translation [2021-08-26 04:41:17,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17 WrapperNode [2021-08-26 04:41:17,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 04:41:17,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 04:41:17,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 04:41:17,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 04:41:17,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 04:41:17,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 04:41:17,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 04:41:17,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 04:41:17,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 04:41:17,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 04:41:17,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 04:41:17,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 04:41:17,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (1/1) ... [2021-08-26 04:41:17,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:41:17,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:17,385 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) [2021-08-26 04:41:17,403 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 [2021-08-26 04:41:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 04:41:17,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 04:41:17,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 04:41:17,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 04:41:17,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 04:41:17,630 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 04:41:17,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:41:17 BoogieIcfgContainer [2021-08-26 04:41:17,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 04:41:17,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 04:41:17,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 04:41:17,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 04:41:17,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:41:17" (1/3) ... [2021-08-26 04:41:17,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edcb0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:41:17, skipping insertion in model container [2021-08-26 04:41:17,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:41:17" (2/3) ... [2021-08-26 04:41:17,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edcb0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:41:17, skipping insertion in model container [2021-08-26 04:41:17,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:41:17" (3/3) ... [2021-08-26 04:41:17,636 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2021-08-26 04:41:17,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 04:41:17,659 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 04:41:17,690 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 04:41:17,694 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 04:41:17,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 04:41:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 04:41:17,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:17,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 04:41:17,711 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:17,720 INFO L82 PathProgramCache]: Analyzing trace with hash 28726596, now seen corresponding path program 1 times [2021-08-26 04:41:17,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:17,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281907087] [2021-08-26 04:41:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:17,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:41:17,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:17,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281907087] [2021-08-26 04:41:17,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281907087] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:41:17,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:41:17,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 04:41:17,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299729663] [2021-08-26 04:41:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 04:41:17,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 04:41:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 04:41:17,870 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:17,881 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-08-26 04:41:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 04:41:17,882 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-26 04:41:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:17,887 INFO L225 Difference]: With dead ends: 28 [2021-08-26 04:41:17,887 INFO L226 Difference]: Without dead ends: 11 [2021-08-26 04:41:17,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 04:41:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-26 04:41:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-26 04:41:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-08-26 04:41:17,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2021-08-26 04:41:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:17,909 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-08-26 04:41:17,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-08-26 04:41:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 04:41:17,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:17,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 04:41:17,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 04:41:17,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash 28697766, now seen corresponding path program 1 times [2021-08-26 04:41:17,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:17,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101048373] [2021-08-26 04:41:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:17,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:41:18,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:18,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101048373] [2021-08-26 04:41:18,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101048373] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:41:18,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:41:18,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:41:18,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847113957] [2021-08-26 04:41:18,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:41:18,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:41:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:41:18,013 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:18,033 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-08-26 04:41:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:41:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-26 04:41:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:18,035 INFO L225 Difference]: With dead ends: 20 [2021-08-26 04:41:18,035 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 04:41:18,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:41:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 04:41:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-08-26 04:41:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-26 04:41:18,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2021-08-26 04:41:18,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:18,041 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-26 04:41:18,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,041 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-08-26 04:41:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 04:41:18,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:18,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:41:18,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 04:41:18,042 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:18,059 INFO L82 PathProgramCache]: Analyzing trace with hash 269702254, now seen corresponding path program 1 times [2021-08-26 04:41:18,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:18,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933975385] [2021-08-26 04:41:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:18,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:41:18,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:18,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933975385] [2021-08-26 04:41:18,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933975385] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:41:18,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:41:18,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:41:18,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315830861] [2021-08-26 04:41:18,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:41:18,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:18,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:41:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:41:18,090 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:18,109 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-08-26 04:41:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:41:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 04:41:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:18,110 INFO L225 Difference]: With dead ends: 25 [2021-08-26 04:41:18,110 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 04:41:18,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:41:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 04:41:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-08-26 04:41:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-08-26 04:41:18,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-08-26 04:41:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:18,112 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-08-26 04:41:18,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-08-26 04:41:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 04:41:18,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:18,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:41:18,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 04:41:18,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:18,114 INFO L82 PathProgramCache]: Analyzing trace with hash 904437762, now seen corresponding path program 1 times [2021-08-26 04:41:18,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:18,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94435692] [2021-08-26 04:41:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:18,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:41:18,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:18,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94435692] [2021-08-26 04:41:18,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94435692] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:41:18,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:41:18,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:41:18,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843028258] [2021-08-26 04:41:18,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:41:18,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:41:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:41:18,143 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:18,155 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-08-26 04:41:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:41:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 04:41:18,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:18,160 INFO L225 Difference]: With dead ends: 25 [2021-08-26 04:41:18,160 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 04:41:18,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:41:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 04:41:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-26 04:41:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-26 04:41:18,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-08-26 04:41:18,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:18,162 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-26 04:41:18,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-26 04:41:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 04:41:18,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:18,163 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:41:18,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 04:41:18,163 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:18,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2012164800, now seen corresponding path program 1 times [2021-08-26 04:41:18,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:18,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373160913] [2021-08-26 04:41:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:18,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:41:18,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:18,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373160913] [2021-08-26 04:41:18,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373160913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:18,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792442243] [2021-08-26 04:41:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:18,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:18,217 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) [2021-08-26 04:41:18,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 04:41:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:18,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 04:41:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:41:18,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792442243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:18,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:18,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 04:41:18,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877243518] [2021-08-26 04:41:18,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:41:18,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:41:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:41:18,402 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:18,438 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-08-26 04:41:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 04:41:18,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 04:41:18,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:18,439 INFO L225 Difference]: With dead ends: 28 [2021-08-26 04:41:18,439 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 04:41:18,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:41:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 04:41:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-26 04:41:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-26 04:41:18,442 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-08-26 04:41:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:18,442 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-26 04:41:18,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-26 04:41:18,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 04:41:18,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:18,443 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:41:18,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:18,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:18,661 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:18,662 INFO L82 PathProgramCache]: Analyzing trace with hash -253582594, now seen corresponding path program 2 times [2021-08-26 04:41:18,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:18,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059893658] [2021-08-26 04:41:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:18,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 04:41:18,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:18,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059893658] [2021-08-26 04:41:18,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059893658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:18,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685155600] [2021-08-26 04:41:18,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:41:18,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:18,711 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) [2021-08-26 04:41:18,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 04:41:18,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:41:18,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 04:41:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:41:18,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685155600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:18,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:18,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-26 04:41:18,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447809835] [2021-08-26 04:41:18,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 04:41:18,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 04:41:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:41:18,879 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:19,023 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-08-26 04:41:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 04:41:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 04:41:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:19,024 INFO L225 Difference]: With dead ends: 51 [2021-08-26 04:41:19,024 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 04:41:19,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-26 04:41:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 04:41:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-08-26 04:41:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-08-26 04:41:19,046 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2021-08-26 04:41:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-08-26 04:41:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-08-26 04:41:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 04:41:19,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:19,047 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:41:19,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:19,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 04:41:19,261 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:19,261 INFO L82 PathProgramCache]: Analyzing trace with hash -311567314, now seen corresponding path program 3 times [2021-08-26 04:41:19,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:19,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867454514] [2021-08-26 04:41:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:19,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-08-26 04:41:19,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:19,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867454514] [2021-08-26 04:41:19,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867454514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:19,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972224495] [2021-08-26 04:41:19,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:41:19,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:19,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:19,325 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) [2021-08-26 04:41:19,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 04:41:19,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 04:41:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 04:41:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-08-26 04:41:19,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972224495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:19,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:19,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 04:41:19,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688230475] [2021-08-26 04:41:19,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:41:19,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:41:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:41:19,576 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:19,601 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-08-26 04:41:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 04:41:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 04:41:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:19,604 INFO L225 Difference]: With dead ends: 71 [2021-08-26 04:41:19,604 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 04:41:19,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:41:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 04:41:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2021-08-26 04:41:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-08-26 04:41:19,619 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 26 [2021-08-26 04:41:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:19,619 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-08-26 04:41:19,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-08-26 04:41:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 04:41:19,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:19,620 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:19,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:19,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:19,821 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:19,821 INFO L82 PathProgramCache]: Analyzing trace with hash -936285786, now seen corresponding path program 4 times [2021-08-26 04:41:19,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:19,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27787611] [2021-08-26 04:41:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:19,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-26 04:41:19,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:19,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27787611] [2021-08-26 04:41:19,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27787611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:19,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61582955] [2021-08-26 04:41:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:41:19,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:19,872 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) [2021-08-26 04:41:19,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 04:41:19,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:41:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 04:41:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-26 04:41:20,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61582955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:20,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 04:41:20,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093722518] [2021-08-26 04:41:20,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 04:41:20,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 04:41:20,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:41:20,109 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:20,134 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2021-08-26 04:41:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 04:41:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-26 04:41:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:20,136 INFO L225 Difference]: With dead ends: 97 [2021-08-26 04:41:20,136 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 04:41:20,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:41:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 04:41:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-08-26 04:41:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-08-26 04:41:20,141 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2021-08-26 04:41:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:20,141 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-08-26 04:41:20,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-08-26 04:41:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-26 04:41:20,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:20,142 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:20,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-26 04:41:20,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:20,349 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1097513562, now seen corresponding path program 5 times [2021-08-26 04:41:20,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:20,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190930572] [2021-08-26 04:41:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:20,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-08-26 04:41:20,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:20,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190930572] [2021-08-26 04:41:20,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190930572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:20,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827730906] [2021-08-26 04:41:20,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:41:20,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:20,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:20,407 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) [2021-08-26 04:41:20,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 04:41:20,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-26 04:41:20,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:41:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 218 proven. 16 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-08-26 04:41:20,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827730906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:20,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:20,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-26 04:41:20,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452427104] [2021-08-26 04:41:20,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 04:41:20,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 04:41:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:41:20,633 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:20,670 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2021-08-26 04:41:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 04:41:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-26 04:41:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:20,670 INFO L225 Difference]: With dead ends: 111 [2021-08-26 04:41:20,670 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 04:41:20,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:41:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 04:41:20,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-08-26 04:41:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-08-26 04:41:20,675 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 55 [2021-08-26 04:41:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:20,675 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-08-26 04:41:20,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-08-26 04:41:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-26 04:41:20,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:20,676 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:20,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:20,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:20,884 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1691369894, now seen corresponding path program 6 times [2021-08-26 04:41:20,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:20,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738181707] [2021-08-26 04:41:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:20,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 190 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-26 04:41:20,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:20,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738181707] [2021-08-26 04:41:20,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738181707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:20,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848901765] [2021-08-26 04:41:20,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:41:20,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:20,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:20,963 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) [2021-08-26 04:41:20,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 04:41:21,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-26 04:41:21,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:21,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 04:41:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 318 proven. 25 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-08-26 04:41:21,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848901765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:21,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:21,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-26 04:41:21,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983284234] [2021-08-26 04:41:21,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 04:41:21,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 04:41:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:41:21,227 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:21,251 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-08-26 04:41:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 04:41:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-08-26 04:41:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:21,253 INFO L225 Difference]: With dead ends: 121 [2021-08-26 04:41:21,253 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 04:41:21,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:41:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 04:41:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-08-26 04:41:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-08-26 04:41:21,263 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 63 [2021-08-26 04:41:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:21,263 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-08-26 04:41:21,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-08-26 04:41:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-26 04:41:21,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:21,264 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:21,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:21,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:21,466 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:21,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1900076454, now seen corresponding path program 7 times [2021-08-26 04:41:21,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:21,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992419886] [2021-08-26 04:41:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:21,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-26 04:41:21,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:21,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992419886] [2021-08-26 04:41:21,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992419886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:21,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028662745] [2021-08-26 04:41:21,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:41:21,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:21,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:21,521 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) [2021-08-26 04:41:21,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 04:41:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 04:41:21,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-26 04:41:21,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028662745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:21,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:21,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 04:41:21,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192158895] [2021-08-26 04:41:21,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 04:41:21,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 04:41:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:41:21,844 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:21,872 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-08-26 04:41:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:41:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-08-26 04:41:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:21,873 INFO L225 Difference]: With dead ends: 168 [2021-08-26 04:41:21,873 INFO L226 Difference]: Without dead ends: 130 [2021-08-26 04:41:21,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:41:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-26 04:41:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2021-08-26 04:41:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-08-26 04:41:21,880 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 71 [2021-08-26 04:41:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:21,881 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-08-26 04:41:21,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-08-26 04:41:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-08-26 04:41:21,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:21,882 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:21,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:22,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:22,092 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1075796806, now seen corresponding path program 8 times [2021-08-26 04:41:22,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:22,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266391096] [2021-08-26 04:41:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:22,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-08-26 04:41:22,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:22,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266391096] [2021-08-26 04:41:22,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266391096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:22,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694345513] [2021-08-26 04:41:22,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:41:22,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:22,197 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) [2021-08-26 04:41:22,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 04:41:22,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:41:22,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:22,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 04:41:22,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-08-26 04:41:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694345513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:22,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:22,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 04:41:22,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9368378] [2021-08-26 04:41:22,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 04:41:22,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 04:41:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:41:22,632 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:22,653 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2021-08-26 04:41:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 04:41:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-08-26 04:41:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:22,654 INFO L225 Difference]: With dead ends: 213 [2021-08-26 04:41:22,654 INFO L226 Difference]: Without dead ends: 160 [2021-08-26 04:41:22,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:41:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-26 04:41:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2021-08-26 04:41:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.083969465648855) internal successors, (142), 131 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2021-08-26 04:41:22,661 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 101 [2021-08-26 04:41:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:22,661 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2021-08-26 04:41:22,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2021-08-26 04:41:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-08-26 04:41:22,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:22,662 INFO L512 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:22,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:22,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 04:41:22,877 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash -538489946, now seen corresponding path program 9 times [2021-08-26 04:41:22,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:22,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310228964] [2021-08-26 04:41:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:22,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1403 proven. 526 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2021-08-26 04:41:22,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:22,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310228964] [2021-08-26 04:41:22,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310228964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:22,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023235632] [2021-08-26 04:41:22,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:41:22,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:22,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:22,981 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) [2021-08-26 04:41:22,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 04:41:23,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-08-26 04:41:23,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:41:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1404 proven. 526 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2021-08-26 04:41:23,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023235632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:23,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:23,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-26 04:41:23,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439781030] [2021-08-26 04:41:23,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 04:41:23,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 04:41:23,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:41:23,433 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:23,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:23,458 INFO L93 Difference]: Finished difference Result 258 states and 279 transitions. [2021-08-26 04:41:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 04:41:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-08-26 04:41:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:23,459 INFO L225 Difference]: With dead ends: 258 [2021-08-26 04:41:23,459 INFO L226 Difference]: Without dead ends: 190 [2021-08-26 04:41:23,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:41:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-26 04:41:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 162. [2021-08-26 04:41:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0807453416149069) internal successors, (174), 161 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 174 transitions. [2021-08-26 04:41:23,465 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 174 transitions. Word has length 131 [2021-08-26 04:41:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:23,465 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 174 transitions. [2021-08-26 04:41:23,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 174 transitions. [2021-08-26 04:41:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-08-26 04:41:23,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:23,466 INFO L512 BasicCegarLoop]: trace histogram [60, 60, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:23,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:23,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 04:41:23,679 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1069707590, now seen corresponding path program 10 times [2021-08-26 04:41:23,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:23,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618274307] [2021-08-26 04:41:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:23,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-08-26 04:41:23,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:23,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618274307] [2021-08-26 04:41:23,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618274307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:23,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133767276] [2021-08-26 04:41:23,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:41:23,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:23,761 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) [2021-08-26 04:41:23,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 04:41:23,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:41:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:23,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 04:41:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-08-26 04:41:24,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133767276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:24,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:24,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-26 04:41:24,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389073220] [2021-08-26 04:41:24,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 04:41:24,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 04:41:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:41:24,339 INFO L87 Difference]: Start difference. First operand 162 states and 174 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:24,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:24,363 INFO L93 Difference]: Finished difference Result 275 states and 297 transitions. [2021-08-26 04:41:24,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 04:41:24,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-08-26 04:41:24,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:24,364 INFO L225 Difference]: With dead ends: 275 [2021-08-26 04:41:24,364 INFO L226 Difference]: Without dead ends: 192 [2021-08-26 04:41:24,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:41:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-26 04:41:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-08-26 04:41:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0785340314136125) internal successors, (206), 191 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 206 transitions. [2021-08-26 04:41:24,370 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 206 transitions. Word has length 161 [2021-08-26 04:41:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:24,371 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 206 transitions. [2021-08-26 04:41:24,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 206 transitions. [2021-08-26 04:41:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-08-26 04:41:24,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:24,372 INFO L512 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2021-08-26 04:41:24,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:24,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 04:41:24,590 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:24,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1969636954, now seen corresponding path program 11 times [2021-08-26 04:41:24,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:24,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876853990] [2021-08-26 04:41:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:24,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2021-08-26 04:41:24,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:24,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876853990] [2021-08-26 04:41:24,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876853990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:24,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125337334] [2021-08-26 04:41:24,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:41:24,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:24,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:24,657 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) [2021-08-26 04:41:24,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 04:41:24,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2021-08-26 04:41:24,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:24,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 04:41:24,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2021-08-26 04:41:25,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125337334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:25,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:25,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 04:41:25,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245575244] [2021-08-26 04:41:25,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 04:41:25,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 04:41:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:41:25,445 INFO L87 Difference]: Start difference. First operand 192 states and 206 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:25,467 INFO L93 Difference]: Finished difference Result 380 states and 408 transitions. [2021-08-26 04:41:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:41:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-08-26 04:41:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:25,469 INFO L225 Difference]: With dead ends: 380 [2021-08-26 04:41:25,469 INFO L226 Difference]: Without dead ends: 377 [2021-08-26 04:41:25,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:41:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-26 04:41:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 285. [2021-08-26 04:41:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0774647887323943) internal successors, (306), 284 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2021-08-26 04:41:25,482 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 191 [2021-08-26 04:41:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:25,482 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2021-08-26 04:41:25,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2021-08-26 04:41:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-08-26 04:41:25,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:25,485 INFO L512 BasicCegarLoop]: trace histogram [108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-08-26 04:41:25,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:25,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-26 04:41:25,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:25,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:25,701 INFO L82 PathProgramCache]: Analyzing trace with hash -148194194, now seen corresponding path program 12 times [2021-08-26 04:41:25,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:25,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65858468] [2021-08-26 04:41:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:25,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2021-08-26 04:41:25,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:25,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65858468] [2021-08-26 04:41:25,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65858468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117611958] [2021-08-26 04:41:25,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:41:25,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:25,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:25,806 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) [2021-08-26 04:41:25,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 04:41:26,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-08-26 04:41:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:26,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 04:41:26,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2021-08-26 04:41:26,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117611958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:26,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:26,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 04:41:26,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489289061] [2021-08-26 04:41:26,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 04:41:26,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 04:41:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:41:26,950 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:26,985 INFO L93 Difference]: Finished difference Result 473 states and 508 transitions. [2021-08-26 04:41:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 04:41:26,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2021-08-26 04:41:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:26,987 INFO L225 Difference]: With dead ends: 473 [2021-08-26 04:41:26,987 INFO L226 Difference]: Without dead ends: 470 [2021-08-26 04:41:26,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:41:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-08-26 04:41:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 378. [2021-08-26 04:41:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.0769230769230769) internal successors, (406), 377 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 406 transitions. [2021-08-26 04:41:26,999 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 406 transitions. Word has length 284 [2021-08-26 04:41:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:27,000 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 406 transitions. [2021-08-26 04:41:27,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 406 transitions. [2021-08-26 04:41:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-08-26 04:41:27,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:27,003 INFO L512 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2021-08-26 04:41:27,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-26 04:41:27,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 04:41:27,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 382291622, now seen corresponding path program 13 times [2021-08-26 04:41:27,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:27,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684374187] [2021-08-26 04:41:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:27,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2021-08-26 04:41:27,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:27,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684374187] [2021-08-26 04:41:27,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684374187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:27,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385043958] [2021-08-26 04:41:27,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:41:27,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:27,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:27,326 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:41:27,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 04:41:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:41:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2021-08-26 04:41:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385043958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:28,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:28,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-26 04:41:28,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450607734] [2021-08-26 04:41:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 04:41:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 04:41:28,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:41:28,798 INFO L87 Difference]: Start difference. First operand 378 states and 406 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:28,834 INFO L93 Difference]: Finished difference Result 566 states and 608 transitions. [2021-08-26 04:41:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 04:41:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2021-08-26 04:41:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:28,836 INFO L225 Difference]: With dead ends: 566 [2021-08-26 04:41:28,836 INFO L226 Difference]: Without dead ends: 563 [2021-08-26 04:41:28,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:41:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-08-26 04:41:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 471. [2021-08-26 04:41:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.0765957446808512) internal successors, (506), 470 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 506 transitions. [2021-08-26 04:41:28,851 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 506 transitions. Word has length 377 [2021-08-26 04:41:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:28,852 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 506 transitions. [2021-08-26 04:41:28,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 506 transitions. [2021-08-26 04:41:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-08-26 04:41:28,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:28,856 INFO L512 BasicCegarLoop]: trace histogram [180, 180, 30, 30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2021-08-26 04:41:28,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:29,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 04:41:29,078 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:29,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1130841966, now seen corresponding path program 14 times [2021-08-26 04:41:29,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:29,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385930766] [2021-08-26 04:41:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:29,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2021-08-26 04:41:29,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:29,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385930766] [2021-08-26 04:41:29,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385930766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:29,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235431396] [2021-08-26 04:41:29,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:41:29,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:29,219 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:41:29,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 04:41:29,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:41:29,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 04:41:29,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2021-08-26 04:41:31,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235431396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:31,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:31,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-26 04:41:31,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563702672] [2021-08-26 04:41:31,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 04:41:31,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:31,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 04:41:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:41:31,111 INFO L87 Difference]: Start difference. First operand 471 states and 506 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:31,144 INFO L93 Difference]: Finished difference Result 567 states and 609 transitions. [2021-08-26 04:41:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 04:41:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2021-08-26 04:41:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:31,146 INFO L225 Difference]: With dead ends: 567 [2021-08-26 04:41:31,146 INFO L226 Difference]: Without dead ends: 564 [2021-08-26 04:41:31,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:41:31,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-08-26 04:41:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-08-26 04:41:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.0763765541740675) internal successors, (606), 563 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 606 transitions. [2021-08-26 04:41:31,162 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 606 transitions. Word has length 470 [2021-08-26 04:41:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:31,163 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 606 transitions. [2021-08-26 04:41:31,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 606 transitions. [2021-08-26 04:41:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2021-08-26 04:41:31,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:41:31,169 INFO L512 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2021-08-26 04:41:31,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 04:41:31,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:31,385 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:41:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:41:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1072389210, now seen corresponding path program 15 times [2021-08-26 04:41:31,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:41:31,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678093019] [2021-08-26 04:41:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:41:31,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:41:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:41:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 0 proven. 48558 refuted. 0 times theorem prover too weak. 7815 trivial. 0 not checked. [2021-08-26 04:41:31,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:41:31,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678093019] [2021-08-26 04:41:31,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678093019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:31,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803676809] [2021-08-26 04:41:31,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:41:31,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:41:31,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:41:31,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 04:41:32,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-08-26 04:41:32,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:41:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 04:41:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:41:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 15747 proven. 1311 refuted. 0 times theorem prover too weak. 39315 trivial. 0 not checked. [2021-08-26 04:41:34,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803676809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:41:34,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:41:34,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 34 [2021-08-26 04:41:34,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666758667] [2021-08-26 04:41:34,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 04:41:34,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:41:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 04:41:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 04:41:34,374 INFO L87 Difference]: Start difference. First operand 564 states and 606 transitions. Second operand has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:41:41,164 INFO L93 Difference]: Finished difference Result 1047 states and 1127 transitions. [2021-08-26 04:41:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2021-08-26 04:41:41,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 563 [2021-08-26 04:41:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:41:41,166 INFO L225 Difference]: With dead ends: 1047 [2021-08-26 04:41:41,166 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 04:41:41,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 553 SyntacticMatches, 3 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44277 ImplicationChecksByTransitivity, 6270.5ms TimeCoverageRelationStatistics Valid=7654, Invalid=96998, Unknown=0, NotChecked=0, Total=104652 [2021-08-26 04:41:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 04:41:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 04:41:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 04:41:41,191 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 563 [2021-08-26 04:41:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:41:41,192 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 04:41:41,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:41:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 04:41:41,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 04:41:41,194 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:41:41,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-26 04:41:41,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:41:41,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 04:41:41,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:41:41,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:41:41,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:41:42,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:41:45,811 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 04:41:45,811 INFO L860 garLoopResultBuilder]: At program point L31(lines 15 32) the Hoare annotation is: true [2021-08-26 04:41:45,811 INFO L857 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-08-26 04:41:45,811 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 25) the Hoare annotation is: (let ((.cse1 (<= ULTIMATE.start_main_~c~0 6)) (.cse0 (<= ULTIMATE.start_main_~a~0 5))) (or (and (= ULTIMATE.start_main_~b~0 5) .cse0 (< ULTIMATE.start_main_~c~0 7)) (and (= ULTIMATE.start_main_~b~0 4) .cse1 .cse0) (and (= ULTIMATE.start_main_~b~0 2) .cse1 .cse0) (and (= ULTIMATE.start_main_~b~0 0) .cse1 .cse0) (and .cse1 .cse0 (= ULTIMATE.start_main_~b~0 3)) (and .cse1 (= ULTIMATE.start_main_~b~0 1) .cse0))) [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L853 garLoopResultBuilder]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (< 5 ULTIMATE.start_main_~b~0) (<= ULTIMATE.start_main_~b~0 6) (<= ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~c~0)) [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2021-08-26 04:41:45,812 INFO L857 garLoopResultBuilder]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2021-08-26 04:41:45,813 INFO L853 garLoopResultBuilder]: At program point L22-3(lines 22 26) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~c~0 6)) (.cse1 (<= ULTIMATE.start_main_~a~0 5)) (.cse2 (< 5 ULTIMATE.start_main_~c~0))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~b~0 3)) (and (= ULTIMATE.start_main_~b~0 5) (<= 6 ULTIMATE.start_main_~c~0) .cse1 (< ULTIMATE.start_main_~c~0 7)) (and (= ULTIMATE.start_main_~b~0 2) .cse0 .cse1 .cse2) (and (< 5 ULTIMATE.start_main_~b~0) (<= ULTIMATE.start_main_~b~0 6) .cse0 .cse1 .cse2) (and .cse0 (= ULTIMATE.start_main_~b~0 1) .cse1 .cse2) (and (= ULTIMATE.start_main_~b~0 0) .cse0 .cse1 .cse2) (and (= ULTIMATE.start_main_~b~0 4) .cse0 .cse1 .cse2))) [2021-08-26 04:41:45,815 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 04:41:45,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:41:45 BoogieIcfgContainer [2021-08-26 04:41:45,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 04:41:45,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 04:41:45,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 04:41:45,827 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 04:41:45,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:41:17" (3/4) ... [2021-08-26 04:41:45,829 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 04:41:45,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-26 04:41:45,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 04:41:45,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 04:41:45,835 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 04:41:45,854 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 04:41:45,854 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 04:41:45,855 INFO L168 Benchmark]: Toolchain (without parser) took 28734.83 ms. Allocated memory was 48.2 MB in the beginning and 513.8 MB in the end (delta: 465.6 MB). Free memory was 24.4 MB in the beginning and 258.4 MB in the end (delta: -234.0 MB). Peak memory consumption was 230.9 MB. Max. memory is 16.1 GB. [2021-08-26 04:41:45,855 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 48.2 MB. Free memory was 29.9 MB in the beginning and 29.8 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:41:45,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.40 ms. Allocated memory is still 48.2 MB. Free memory was 24.2 MB in the beginning and 26.1 MB in the end (delta: -1.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-08-26 04:41:45,856 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.60 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 26.1 MB in the beginning and 45.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:41:45,856 INFO L168 Benchmark]: Boogie Preprocessor took 29.08 ms. Allocated memory is still 60.8 MB. Free memory was 45.1 MB in the beginning and 44.2 MB in the end (delta: 900.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:41:45,856 INFO L168 Benchmark]: RCFGBuilder took 267.83 ms. Allocated memory is still 60.8 MB. Free memory was 44.0 MB in the beginning and 32.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 04:41:45,856 INFO L168 Benchmark]: TraceAbstraction took 28193.95 ms. Allocated memory was 60.8 MB in the beginning and 513.8 MB in the end (delta: 453.0 MB). Free memory was 31.8 MB in the beginning and 260.5 MB in the end (delta: -228.6 MB). Peak memory consumption was 362.0 MB. Max. memory is 16.1 GB. [2021-08-26 04:41:45,856 INFO L168 Benchmark]: Witness Printer took 27.51 ms. Allocated memory is still 513.8 MB. Free memory was 260.5 MB in the beginning and 258.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:41:45,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 48.2 MB. Free memory was 29.9 MB in the beginning and 29.8 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 159.40 ms. Allocated memory is still 48.2 MB. Free memory was 24.2 MB in the beginning and 26.1 MB in the end (delta: -1.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.60 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 26.1 MB in the beginning and 45.1 MB in the end (delta: -19.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.08 ms. Allocated memory is still 60.8 MB. Free memory was 45.1 MB in the beginning and 44.2 MB in the end (delta: 900.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 267.83 ms. Allocated memory is still 60.8 MB. Free memory was 44.0 MB in the beginning and 32.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28193.95 ms. Allocated memory was 60.8 MB in the beginning and 513.8 MB in the end (delta: 453.0 MB). Free memory was 31.8 MB in the beginning and 260.5 MB in the end (delta: -228.6 MB). Peak memory consumption was 362.0 MB. Max. memory is 16.1 GB. * Witness Printer took 27.51 ms. Allocated memory is still 513.8 MB. Free memory was 260.5 MB in the beginning and 258.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28126.6ms, OverallIterations: 19, TraceHistogramMax: 216, EmptinessCheckTime: 31.2ms, AutomataDifference: 7446.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 4393.5ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 204 SDtfs, 835 SDslu, 355 SDs, 0 SdLazy, 808 SolverSat, 564 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 876.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2974 GetRequests, 2567 SyntacticMatches, 3 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44353 ImplicationChecksByTransitivity, 6611.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=564occurred in iteration=18, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 141.0ms AutomataMinimizationTime, 19 MinimizatonAttempts, 409 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 173 HoareAnnotationTreeSize, 4 FomulaSimplifications, 81170 FormulaSimplificationTreeSizeReduction, 1387.1ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 5785 FormulaSimplificationTreeSizeReductionInter, 2997.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 285.8ms SsaConstructionTime, 965.8ms SatisfiabilityAnalysisTime, 8251.9ms InterpolantComputationTime, 5165 NumberOfCodeBlocks, 4619 NumberOfCodeBlocksAsserted, 293 NumberOfCheckSat, 5131 ConstructedInterpolants, 0 QuantifiedInterpolants, 13643 SizeOfPredicates, 3 NumberOfNonLiveVariables, 3678 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 122731/302125 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((5 < b && b <= 6) && a <= 6) && c <= 6) && 5 < c - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((b == 5 && a <= 5) && c < 7) || ((b == 4 && c <= 6) && a <= 5)) || ((b == 2 && c <= 6) && a <= 5)) || ((b == 0 && c <= 6) && a <= 5)) || ((c <= 6 && a <= 5) && b == 3)) || ((c <= 6 && b == 1) && a <= 5) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((((((c <= 6 && a <= 5) && 5 < c) && b == 3) || (((b == 5 && 6 <= c) && a <= 5) && c < 7)) || (((b == 2 && c <= 6) && a <= 5) && 5 < c)) || ((((5 < b && b <= 6) && c <= 6) && a <= 5) && 5 < c)) || (((c <= 6 && b == 1) && a <= 5) && 5 < c)) || (((b == 0 && c <= 6) && a <= 5) && 5 < c)) || (((b == 4 && c <= 6) && a <= 5) && 5 < c) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 04:41:45,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...