./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.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/nla-digbench-scaling/bresenham-ll_unwindbound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ff0df99408e4f7fc8f2cda99e29bcd3b5e6898c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 05:00:15,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 05:00:15,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 05:00:15,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 05:00:15,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 05:00:15,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 05:00:15,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 05:00:15,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 05:00:15,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 05:00:15,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 05:00:15,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 05:00:15,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 05:00:15,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 05:00:15,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 05:00:15,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 05:00:15,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 05:00:15,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 05:00:15,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 05:00:15,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 05:00:15,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 05:00:15,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 05:00:15,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 05:00:15,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 05:00:15,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 05:00:15,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 05:00:15,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 05:00:15,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 05:00:15,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 05:00:15,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 05:00:15,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 05:00:15,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 05:00:15,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 05:00:15,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 05:00:15,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 05:00:15,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 05:00:15,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 05:00:15,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 05:00:15,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 05:00:15,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 05:00:15,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 05:00:15,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 05:00:15,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 05:00:15,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 05:00:15,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 05:00:15,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 05:00:15,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 05:00:15,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 05:00:15,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 05:00:15,382 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 05:00:15,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 05:00:15,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 05:00:15,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 05:00:15,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 05:00:15,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 05:00:15,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 05:00:15,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 05:00:15,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 05:00:15,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 05:00:15,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 05:00:15,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 05:00:15,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 05:00:15,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 05:00:15,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 05:00:15,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 05:00:15,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:00:15,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 05:00:15,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 05:00:15,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 05:00:15,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 05:00:15,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 05:00:15,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 05:00:15,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 05:00:15,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ff0df99408e4f7fc8f2cda99e29bcd3b5e6898c [2021-08-26 05:00:15,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 05:00:15,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 05:00:15,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 05:00:15,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 05:00:15,733 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 05:00:15,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2021-08-26 05:00:15,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7894cb3d6/ff707e34d54446daa0bad21187fd66c1/FLAG356c6b3f9 [2021-08-26 05:00:16,240 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 05:00:16,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2021-08-26 05:00:16,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7894cb3d6/ff707e34d54446daa0bad21187fd66c1/FLAG356c6b3f9 [2021-08-26 05:00:16,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7894cb3d6/ff707e34d54446daa0bad21187fd66c1 [2021-08-26 05:00:16,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 05:00:16,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 05:00:16,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 05:00:16,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 05:00:16,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 05:00:16,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0ad5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16, skipping insertion in model container [2021-08-26 05:00:16,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 05:00:16,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 05:00:16,790 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/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2021-08-26 05:00:16,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:00:16,810 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 05:00:16,820 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/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2021-08-26 05:00:16,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:00:16,837 INFO L208 MainTranslator]: Completed translation [2021-08-26 05:00:16,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16 WrapperNode [2021-08-26 05:00:16,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 05:00:16,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 05:00:16,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 05:00:16,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 05:00:16,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 05:00:16,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 05:00:16,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 05:00:16,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 05:00:16,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 05:00:16,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 05:00:16,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 05:00:16,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 05:00:16,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (1/1) ... [2021-08-26 05:00:16,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:00:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:16,972 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 05:00:16,996 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 05:00:17,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 05:00:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 05:00:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 05:00:17,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 05:00:17,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 05:00:17,304 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 05:00:17,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:00:17 BoogieIcfgContainer [2021-08-26 05:00:17,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 05:00:17,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 05:00:17,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 05:00:17,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 05:00:17,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:00:16" (1/3) ... [2021-08-26 05:00:17,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352ee584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:00:17, skipping insertion in model container [2021-08-26 05:00:17,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:00:16" (2/3) ... [2021-08-26 05:00:17,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352ee584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:00:17, skipping insertion in model container [2021-08-26 05:00:17,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:00:17" (3/3) ... [2021-08-26 05:00:17,317 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.c [2021-08-26 05:00:17,321 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 05:00:17,333 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 05:00:17,398 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 05:00:17,408 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 05:00:17,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 05:00:17,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 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 05:00:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 05:00:17,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:17,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 05:00:17,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-08-26 05:00:17,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:17,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097488226] [2021-08-26 05:00:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:17,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:17,590 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 05:00:17,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:17,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097488226] [2021-08-26 05:00:17,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097488226] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:00:17,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:00:17,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 05:00:17,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468049094] [2021-08-26 05:00:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 05:00:17,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 05:00:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:00:17,626 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 05:00:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:17,638 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-08-26 05:00:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 05:00:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 05:00:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:17,647 INFO L225 Difference]: With dead ends: 34 [2021-08-26 05:00:17,648 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 05:00:17,650 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 05:00:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 05:00:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-26 05:00:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) 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 05:00:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-26 05:00:17,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-08-26 05:00:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:17,677 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-26 05:00:17,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 05:00:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-26 05:00:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 05:00:17,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:17,678 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 05:00:17,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 05:00:17,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:17,682 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-08-26 05:00:17,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:17,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205257867] [2021-08-26 05:00:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:17,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:17,725 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:17,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344303217] [2021-08-26 05:00:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:17,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:17,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:17,728 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 05:00:17,729 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 05:00:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:17,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:00:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:17,948 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 05:00:17,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:17,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205257867] [2021-08-26 05:00:17,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:17,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344303217] [2021-08-26 05:00:17,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344303217] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:00:17,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:00:17,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:00:17,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977947705] [2021-08-26 05:00:17,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:00:17,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:17,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:00:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:00:17,952 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 05:00:18,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:18,032 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-08-26 05:00:18,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:00:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-08-26 05:00:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:18,034 INFO L225 Difference]: With dead ends: 30 [2021-08-26 05:00:18,034 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 05:00:18,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:00:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 05:00:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-08-26 05:00:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 05:00:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-26 05:00:18,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-08-26 05:00:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:18,044 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-26 05:00:18,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 05:00:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-26 05:00:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 05:00:18,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:18,046 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:18,076 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 05:00:18,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:18,273 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-08-26 05:00:18,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:18,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389985399] [2021-08-26 05:00:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:18,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:18,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:18,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436626454] [2021-08-26 05:00:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:18,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:18,299 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 05:00:18,300 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 05:00:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:18,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 05:00:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:18,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:18,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389985399] [2021-08-26 05:00:18,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:18,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436626454] [2021-08-26 05:00:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436626454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:18,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:00:18,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849545647] [2021-08-26 05:00:18,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:00:18,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:00:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:00:18,660 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 05:00:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:18,774 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-08-26 05:00:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:00:18,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2021-08-26 05:00:18,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:18,777 INFO L225 Difference]: With dead ends: 35 [2021-08-26 05:00:18,777 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 05:00:18,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 05:00:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-26 05:00:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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 05:00:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-26 05:00:18,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-26 05:00:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:18,785 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-26 05:00:18,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 05:00:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-26 05:00:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 05:00:18,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:18,787 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:18,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-26 05:00:19,011 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,SelfDestructingSolverStorable2 [2021-08-26 05:00:19,012 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-08-26 05:00:19,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:19,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606188950] [2021-08-26 05:00:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:19,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:19,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:19,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646746282] [2021-08-26 05:00:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:19,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:19,025 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 05:00:19,027 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 05:00:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:19,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 05:00:19,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:19,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:19,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606188950] [2021-08-26 05:00:19,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:19,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646746282] [2021-08-26 05:00:19,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646746282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:19,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:19,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:00:19,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371724686] [2021-08-26 05:00:19,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:00:19,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:00:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:00:19,289 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 05:00:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:19,377 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-08-26 05:00:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:00:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2021-08-26 05:00:19,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:19,378 INFO L225 Difference]: With dead ends: 39 [2021-08-26 05:00:19,378 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 05:00:19,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 05:00:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-08-26 05:00:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 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 05:00:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-08-26 05:00:19,382 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-08-26 05:00:19,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:19,382 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-08-26 05:00:19,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 05:00:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-08-26 05:00:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 05:00:19,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:19,383 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:19,408 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 05:00:19,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:19,602 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:19,603 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-08-26 05:00:19,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:19,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13507947] [2021-08-26 05:00:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:19,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:19,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:19,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573000043] [2021-08-26 05:00:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:19,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:19,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:19,622 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 05:00:19,658 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 05:00:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 05:00:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:19,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:19,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13507947] [2021-08-26 05:00:19,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:19,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573000043] [2021-08-26 05:00:19,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573000043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:19,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:19,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-26 05:00:19,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559718924] [2021-08-26 05:00:19,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:00:19,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:00:19,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:00:19,789 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 05:00:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:19,813 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-08-26 05:00:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:00:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) Word has length 13 [2021-08-26 05:00:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:19,814 INFO L225 Difference]: With dead ends: 32 [2021-08-26 05:00:19,814 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 05:00:19,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:00:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 05:00:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 05:00:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 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 05:00:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-08-26 05:00:19,818 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-08-26 05:00:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:19,818 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-08-26 05:00:19,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 05:00:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-08-26 05:00:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 05:00:19,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:19,819 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:19,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:20,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:20,040 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-08-26 05:00:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:20,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627763007] [2021-08-26 05:00:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:20,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:20,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:20,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984310791] [2021-08-26 05:00:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:20,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:20,050 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 05:00:20,053 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 05:00:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:20,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 05:00:20,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:20,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:20,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627763007] [2021-08-26 05:00:20,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:20,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984310791] [2021-08-26 05:00:20,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984310791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:20,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:20,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:00:20,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358944414] [2021-08-26 05:00:20,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:00:20,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:00:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:20,640 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 05:00:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:20,808 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-08-26 05:00:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:00:20,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) Word has length 15 [2021-08-26 05:00:20,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:20,808 INFO L225 Difference]: With dead ends: 38 [2021-08-26 05:00:20,808 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 05:00:20,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:00:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 05:00:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-08-26 05:00:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 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 05:00:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-26 05:00:20,813 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-08-26 05:00:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:20,813 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-26 05:00:20,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 05:00:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-26 05:00:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:00:20,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:20,814 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-26 05:00:20,832 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 05:00:21,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:21,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:21,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:21,033 INFO L82 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-08-26 05:00:21,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:21,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722326230] [2021-08-26 05:00:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:21,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:21,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:21,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539937739] [2021-08-26 05:00:21,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:21,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:21,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:21,055 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 05:00:21,060 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 05:00:21,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:00:21,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 05:00:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:21,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:21,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722326230] [2021-08-26 05:00:21,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:21,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539937739] [2021-08-26 05:00:21,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539937739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:21,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:21,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:00:21,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066600503] [2021-08-26 05:00:21,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:00:21,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:21,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:00:21,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:21,607 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 05:00:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:21,815 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-08-26 05:00:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:00:21,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) Word has length 18 [2021-08-26 05:00:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:21,818 INFO L225 Difference]: With dead ends: 46 [2021-08-26 05:00:21,818 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 05:00:21,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:00:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 05:00:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-08-26 05:00:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 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 05:00:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-26 05:00:21,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-08-26 05:00:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:21,834 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-26 05:00:21,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 05:00:21,835 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-26 05:00:21,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:00:21,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:21,836 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:21,864 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 05:00:22,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:22,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-08-26 05:00:22,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:22,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791297028] [2021-08-26 05:00:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:22,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:22,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:22,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643033202] [2021-08-26 05:00:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:22,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:22,062 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 05:00:22,063 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 05:00:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 05:00:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:22,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:22,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791297028] [2021-08-26 05:00:22,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:22,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643033202] [2021-08-26 05:00:22,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643033202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:22,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:22,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:00:22,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474209976] [2021-08-26 05:00:22,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:00:22,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:00:22,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:00:22,834 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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 05:00:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:23,381 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-08-26 05:00:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:00:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) Word has length 18 [2021-08-26 05:00:23,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:23,382 INFO L225 Difference]: With dead ends: 60 [2021-08-26 05:00:23,383 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 05:00:23,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-26 05:00:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 05:00:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-08-26 05:00:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 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 05:00:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-08-26 05:00:23,387 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-08-26 05:00:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:23,388 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-08-26 05:00:23,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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 05:00:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-08-26 05:00:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:00:23,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:23,388 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:23,411 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 05:00:23,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:23,601 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash -701540760, now seen corresponding path program 2 times [2021-08-26 05:00:23,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:23,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070026673] [2021-08-26 05:00:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:23,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:23,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:23,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211778592] [2021-08-26 05:00:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:23,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:23,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:23,618 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 05:00:23,619 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 05:00:23,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:00:23,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 05:00:23,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:23,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:23,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070026673] [2021-08-26 05:00:23,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:23,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211778592] [2021-08-26 05:00:23,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211778592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:23,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:23,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:00:23,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528096145] [2021-08-26 05:00:23,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:00:23,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:00:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:00:23,990 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 05:00:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:24,148 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-08-26 05:00:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:00:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) Word has length 18 [2021-08-26 05:00:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:24,151 INFO L225 Difference]: With dead ends: 57 [2021-08-26 05:00:24,151 INFO L226 Difference]: Without dead ends: 55 [2021-08-26 05:00:24,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:00:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-26 05:00:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-08-26 05:00:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 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 05:00:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-08-26 05:00:24,167 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2021-08-26 05:00:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:24,168 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-08-26 05:00:24,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 05:00:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-08-26 05:00:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:00:24,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:24,169 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-26 05:00:24,194 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 05:00:24,384 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,SelfDestructingSolverStorable8 [2021-08-26 05:00:24,385 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:24,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:24,385 INFO L82 PathProgramCache]: Analyzing trace with hash -758799062, now seen corresponding path program 2 times [2021-08-26 05:00:24,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:24,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513767500] [2021-08-26 05:00:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:24,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:24,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:24,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516800252] [2021-08-26 05:00:24,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:24,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:24,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:24,397 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 05:00:24,398 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 05:00:24,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:00:24,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:24,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 05:00:24,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:24,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:24,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513767500] [2021-08-26 05:00:24,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:24,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516800252] [2021-08-26 05:00:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516800252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:24,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:24,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:00:24,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353515923] [2021-08-26 05:00:24,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:00:24,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:24,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:00:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:00:24,925 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 05:00:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:25,232 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-08-26 05:00:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:00:25,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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) Word has length 18 [2021-08-26 05:00:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:25,234 INFO L225 Difference]: With dead ends: 60 [2021-08-26 05:00:25,234 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 05:00:25,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:00:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 05:00:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-08-26 05:00:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 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 05:00:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-08-26 05:00:25,239 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2021-08-26 05:00:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:25,239 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-08-26 05:00:25,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 05:00:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-08-26 05:00:25,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 05:00:25,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:25,239 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:25,271 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 05:00:25,452 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,SelfDestructingSolverStorable9 [2021-08-26 05:00:25,453 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-08-26 05:00:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:25,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151581775] [2021-08-26 05:00:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:25,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:25,462 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:25,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55079068] [2021-08-26 05:00:25,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:25,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:25,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:25,463 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 05:00:25,466 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 05:00:25,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:00:25,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:25,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:00:25,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:25,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:25,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151581775] [2021-08-26 05:00:25,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:25,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55079068] [2021-08-26 05:00:25,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55079068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:25,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:25,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:00:25,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095874716] [2021-08-26 05:00:25,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:00:25,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:25,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:00:25,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:00:25,735 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 05:00:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:25,762 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-08-26 05:00:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:00:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2021-08-26 05:00:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:25,764 INFO L225 Difference]: With dead ends: 50 [2021-08-26 05:00:25,764 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 05:00:25,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:00:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 05:00:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-26 05:00:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 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 05:00:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-08-26 05:00:25,768 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2021-08-26 05:00:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:25,769 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-08-26 05:00:25,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 05:00:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-08-26 05:00:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 05:00:25,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:25,769 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:25,787 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 05:00:25,984 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,SelfDestructingSolverStorable10 [2021-08-26 05:00:25,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:25,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1564888737, now seen corresponding path program 2 times [2021-08-26 05:00:25,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:25,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617443656] [2021-08-26 05:00:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:25,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:25,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:25,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715115767] [2021-08-26 05:00:25,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:25,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:25,995 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 05:00:25,996 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 05:00:26,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:00:26,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 05:00:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:26,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:26,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617443656] [2021-08-26 05:00:26,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:26,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715115767] [2021-08-26 05:00:26,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715115767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:26,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:26,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:00:26,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099281145] [2021-08-26 05:00:26,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:00:26,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:00:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:00:26,595 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 05:00:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:26,848 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-08-26 05:00:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:00:26,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) Word has length 21 [2021-08-26 05:00:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:26,849 INFO L225 Difference]: With dead ends: 61 [2021-08-26 05:00:26,849 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 05:00:26,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:00:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 05:00:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-08-26 05:00:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 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 05:00:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-08-26 05:00:26,854 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2021-08-26 05:00:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:26,855 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-08-26 05:00:26,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 05:00:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-08-26 05:00:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 05:00:26,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:26,855 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:26,885 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 05:00:27,072 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,SelfDestructingSolverStorable11 [2021-08-26 05:00:27,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -285025059, now seen corresponding path program 1 times [2021-08-26 05:00:27,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:27,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343268949] [2021-08-26 05:00:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:27,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:27,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:27,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751371938] [2021-08-26 05:00:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:27,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:27,137 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 05:00:27,138 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 05:00:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 05:00:27,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:27,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:27,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343268949] [2021-08-26 05:00:27,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:27,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751371938] [2021-08-26 05:00:27,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751371938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:27,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:27,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:00:27,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114726693] [2021-08-26 05:00:27,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:00:27,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:00:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:00:27,542 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 05:00:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:27,689 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-08-26 05:00:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:00:27,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) Word has length 21 [2021-08-26 05:00:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:27,690 INFO L225 Difference]: With dead ends: 53 [2021-08-26 05:00:27,690 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 05:00:27,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:00:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 05:00:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-08-26 05:00:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 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 05:00:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-08-26 05:00:27,694 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-08-26 05:00:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:27,694 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-08-26 05:00:27,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 05:00:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-08-26 05:00:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 05:00:27,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:27,695 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-08-26 05:00:27,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:27,901 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,SelfDestructingSolverStorable12 [2021-08-26 05:00:27,901 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash -429625836, now seen corresponding path program 3 times [2021-08-26 05:00:27,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:27,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822549117] [2021-08-26 05:00:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:27,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:27,907 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:27,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901967475] [2021-08-26 05:00:27,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:00:27,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:27,908 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 05:00:27,910 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 05:00:28,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:00:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:28,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 05:00:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-26 05:00:28,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:28,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822549117] [2021-08-26 05:00:28,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:28,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901967475] [2021-08-26 05:00:28,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901967475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:28,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:28,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:00:28,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295859297] [2021-08-26 05:00:28,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:00:28,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:28,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:00:28,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:00:28,822 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 05:00:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:29,090 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-08-26 05:00:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 05:00:29,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 24 [2021-08-26 05:00:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:29,091 INFO L225 Difference]: With dead ends: 64 [2021-08-26 05:00:29,091 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 05:00:29,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:00:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 05:00:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-08-26 05:00:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 45 states have internal predecessors, (52), 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 05:00:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-08-26 05:00:29,096 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-08-26 05:00:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:29,096 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-08-26 05:00:29,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 05:00:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-08-26 05:00:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 05:00:29,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:29,097 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-08-26 05:00:29,106 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 05:00:29,303 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,SelfDestructingSolverStorable13 [2021-08-26 05:00:29,303 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:29,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:29,304 INFO L82 PathProgramCache]: Analyzing trace with hash -486884138, now seen corresponding path program 3 times [2021-08-26 05:00:29,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:29,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773734633] [2021-08-26 05:00:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:29,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:29,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:29,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76875838] [2021-08-26 05:00:29,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:00:29,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:29,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:29,322 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 05:00:29,333 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 05:00:29,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:00:29,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:29,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 05:00:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-26 05:00:29,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:29,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773734633] [2021-08-26 05:00:29,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:29,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76875838] [2021-08-26 05:00:29,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76875838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:29,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:29,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:00:29,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587787346] [2021-08-26 05:00:29,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:00:29,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:00:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:00:29,722 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 05:00:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:29,790 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-08-26 05:00:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:00:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 24 [2021-08-26 05:00:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:29,792 INFO L225 Difference]: With dead ends: 47 [2021-08-26 05:00:29,792 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 05:00:29,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 05:00:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-08-26 05:00:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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 05:00:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-08-26 05:00:29,809 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-08-26 05:00:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:29,809 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-08-26 05:00:29,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 05:00:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-08-26 05:00:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 05:00:29,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:29,811 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:29,837 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 05:00:30,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:30,033 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash -433535720, now seen corresponding path program 3 times [2021-08-26 05:00:30,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:30,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155619458] [2021-08-26 05:00:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:30,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:30,039 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:30,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953610926] [2021-08-26 05:00:30,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:00:30,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:30,040 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 05:00:30,041 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 05:00:30,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 05:00:30,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:00:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:30,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:30,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155619458] [2021-08-26 05:00:30,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:30,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953610926] [2021-08-26 05:00:30,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953610926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:30,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:30,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:00:30,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686244132] [2021-08-26 05:00:30,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:00:30,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:00:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:00:30,421 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 05:00:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:30,464 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-08-26 05:00:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:00:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 25 [2021-08-26 05:00:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:30,466 INFO L225 Difference]: With dead ends: 48 [2021-08-26 05:00:30,466 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 05:00:30,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:00:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 05:00:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-26 05:00:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 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 05:00:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-08-26 05:00:30,471 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-08-26 05:00:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:30,471 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-08-26 05:00:30,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 05:00:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-08-26 05:00:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 05:00:30,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:30,475 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:30,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:30,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 05:00:30,689 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash 24155569, now seen corresponding path program 3 times [2021-08-26 05:00:30,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:30,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903134099] [2021-08-26 05:00:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:30,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:30,694 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:30,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491426208] [2021-08-26 05:00:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:00:30,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:30,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:30,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 05:00:31,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:00:31,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 05:00:31,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-26 05:00:31,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:31,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903134099] [2021-08-26 05:00:31,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:31,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491426208] [2021-08-26 05:00:31,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491426208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:00:31,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:00:31,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 05:00:31,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271709990] [2021-08-26 05:00:31,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:00:31,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:00:31,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:00:31,376 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 05:00:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:31,551 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-08-26 05:00:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:00:31,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) Word has length 27 [2021-08-26 05:00:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:31,551 INFO L225 Difference]: With dead ends: 48 [2021-08-26 05:00:31,551 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 05:00:31,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:00:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 05:00:31,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-26 05:00:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 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 05:00:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-08-26 05:00:31,555 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2021-08-26 05:00:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:31,556 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-08-26 05:00:31,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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 05:00:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-08-26 05:00:31,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 05:00:31,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:31,556 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:31,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:31,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 05:00:31,763 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:31,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1957613462, now seen corresponding path program 4 times [2021-08-26 05:00:31,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:31,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592054711] [2021-08-26 05:00:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:31,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:31,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:31,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380174476] [2021-08-26 05:00:31,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:00:31,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:31,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:31,775 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:31,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 05:00:32,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:00:32,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:32,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:00:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:32,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:32,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592054711] [2021-08-26 05:00:32,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:32,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380174476] [2021-08-26 05:00:32,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380174476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:32,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:32,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:00:32,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115991614] [2021-08-26 05:00:32,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:00:32,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:00:32,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:00:32,210 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 05:00:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:32,258 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-26 05:00:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 05:00:32,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 31 [2021-08-26 05:00:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:32,259 INFO L225 Difference]: With dead ends: 54 [2021-08-26 05:00:32,259 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 05:00:32,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:00:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 05:00:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-26 05:00:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 05:00:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-08-26 05:00:32,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-08-26 05:00:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:32,264 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-08-26 05:00:32,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 05:00:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-08-26 05:00:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 05:00:32,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:32,265 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:32,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:32,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 05:00:32,478 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -553888196, now seen corresponding path program 5 times [2021-08-26 05:00:32,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:32,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740673121] [2021-08-26 05:00:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:32,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:32,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:32,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828408229] [2021-08-26 05:00:32,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 05:00:32,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:32,493 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:32,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 05:00:32,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 05:00:32,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:00:32,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:32,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:32,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740673121] [2021-08-26 05:00:32,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:32,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828408229] [2021-08-26 05:00:32,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828408229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:32,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:32,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:00:32,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562819602] [2021-08-26 05:00:32,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:00:32,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:00:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:00:32,930 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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 05:00:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:32,986 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-08-26 05:00:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 05:00:32,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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 37 [2021-08-26 05:00:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:32,987 INFO L225 Difference]: With dead ends: 60 [2021-08-26 05:00:32,987 INFO L226 Difference]: Without dead ends: 56 [2021-08-26 05:00:32,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:00:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-26 05:00:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-26 05:00:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 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 05:00:32,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-26 05:00:32,991 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2021-08-26 05:00:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:32,992 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-26 05:00:32,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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 05:00:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-26 05:00:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 05:00:32,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:32,992 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:33,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:33,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:33,223 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash 835999374, now seen corresponding path program 6 times [2021-08-26 05:00:33,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:33,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804394088] [2021-08-26 05:00:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:33,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:33,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:33,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82898698] [2021-08-26 05:00:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 05:00:33,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:33,236 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:33,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 05:00:33,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 05:00:33,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:00:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:33,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:33,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804394088] [2021-08-26 05:00:33,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:33,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82898698] [2021-08-26 05:00:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82898698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:33,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:33,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:00:33,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483577857] [2021-08-26 05:00:33,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:00:33,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:00:33,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:00:33,876 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 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 05:00:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:33,947 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-08-26 05:00:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 05:00:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 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 43 [2021-08-26 05:00:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:33,948 INFO L225 Difference]: With dead ends: 66 [2021-08-26 05:00:33,948 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 05:00:33,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-26 05:00:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 05:00:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-26 05:00:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 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 05:00:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-08-26 05:00:33,952 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 43 [2021-08-26 05:00:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:33,952 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-08-26 05:00:33,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 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 05:00:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-08-26 05:00:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 05:00:33,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:33,953 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:33,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:34,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:34,160 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:34,160 INFO L82 PathProgramCache]: Analyzing trace with hash -194293408, now seen corresponding path program 7 times [2021-08-26 05:00:34,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:34,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950712978] [2021-08-26 05:00:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:34,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:34,172 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:34,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911504590] [2021-08-26 05:00:34,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 05:00:34,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:34,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:34,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:34,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 05:00:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:00:34,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 05:00:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:34,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:34,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950712978] [2021-08-26 05:00:34,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:34,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911504590] [2021-08-26 05:00:34,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911504590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:34,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:34,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:00:34,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289554558] [2021-08-26 05:00:34,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 05:00:34,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:34,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 05:00:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:00:34,672 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 05:00:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:34,751 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-08-26 05:00:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 05:00:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 49 [2021-08-26 05:00:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:34,752 INFO L225 Difference]: With dead ends: 72 [2021-08-26 05:00:34,752 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 05:00:34,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-08-26 05:00:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 05:00:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-08-26 05:00:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 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 05:00:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-08-26 05:00:34,757 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2021-08-26 05:00:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:34,758 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-08-26 05:00:34,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 05:00:34,758 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-08-26 05:00:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-26 05:00:34,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:34,758 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:34,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:34,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 05:00:34,973 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash 691758770, now seen corresponding path program 8 times [2021-08-26 05:00:34,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:34,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383106618] [2021-08-26 05:00:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:34,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:34,983 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:34,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909723742] [2021-08-26 05:00:34,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:00:34,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:34,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:34,984 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:35,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 05:00:35,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:00:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 05:00:35,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:35,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:35,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383106618] [2021-08-26 05:00:35,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:35,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909723742] [2021-08-26 05:00:35,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909723742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:35,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:35,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 05:00:35,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524041674] [2021-08-26 05:00:35,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:00:35,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:00:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:00:35,584 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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 05:00:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:35,704 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-08-26 05:00:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 05:00:35,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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 05:00:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:35,706 INFO L225 Difference]: With dead ends: 78 [2021-08-26 05:00:35,706 INFO L226 Difference]: Without dead ends: 74 [2021-08-26 05:00:35,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-08-26 05:00:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-26 05:00:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-08-26 05:00:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 73 states have internal predecessors, (84), 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 05:00:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-08-26 05:00:35,712 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 55 [2021-08-26 05:00:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:35,712 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-08-26 05:00:35,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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 05:00:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-08-26 05:00:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-26 05:00:35,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:35,713 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:35,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:35,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 05:00:35,929 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1453766276, now seen corresponding path program 9 times [2021-08-26 05:00:35,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:35,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117881913] [2021-08-26 05:00:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:35,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:35,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:35,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346132643] [2021-08-26 05:00:35,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:00:35,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:35,938 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:35,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 05:00:36,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-26 05:00:36,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:00:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 05:00:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:00:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:00:36,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:00:36,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117881913] [2021-08-26 05:00:36,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:00:36,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346132643] [2021-08-26 05:00:36,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346132643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:00:36,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:00:36,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:00:36,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477013852] [2021-08-26 05:00:36,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 05:00:36,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:00:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 05:00:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:00:36,784 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 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 05:00:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:00:36,932 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2021-08-26 05:00:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 05:00:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 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 61 [2021-08-26 05:00:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:00:36,933 INFO L225 Difference]: With dead ends: 84 [2021-08-26 05:00:36,933 INFO L226 Difference]: Without dead ends: 80 [2021-08-26 05:00:36,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-08-26 05:00:36,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-26 05:00:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-26 05:00:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 79 states have internal predecessors, (91), 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 05:00:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-08-26 05:00:36,941 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 61 [2021-08-26 05:00:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:00:36,942 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-08-26 05:00:36,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 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 05:00:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-08-26 05:00:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-26 05:00:36,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:00:36,943 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-08-26 05:00:36,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:37,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:37,153 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:00:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:00:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash -118005546, now seen corresponding path program 10 times [2021-08-26 05:00:37,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:00:37,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020895686] [2021-08-26 05:00:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:00:37,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:00:37,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:00:37,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429564396] [2021-08-26 05:00:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:00:37,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:00:37,161 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:00:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 05:00:37,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:00:37,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-26 05:00:37,829 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 05:00:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 05:00:37,916 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 05:00:37,916 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 05:00:37,917 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:37,919 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:00:37,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 05:00:38,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:00:38,131 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 05:00:38,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:00:38 BoogieIcfgContainer [2021-08-26 05:00:38,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 05:00:38,187 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 05:00:38,188 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 05:00:38,188 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 05:00:38,188 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:00:17" (3/4) ... [2021-08-26 05:00:38,190 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 05:00:38,265 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 05:00:38,266 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 05:00:38,267 INFO L168 Benchmark]: Toolchain (without parser) took 21611.56 ms. Allocated memory was 50.3 MB in the beginning and 161.5 MB in the end (delta: 111.1 MB). Free memory was 26.8 MB in the beginning and 44.5 MB in the end (delta: -17.7 MB). Peak memory consumption was 91.4 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:38,267 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:00:38,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.62 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 27.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:38,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.54 ms. Allocated memory is still 62.9 MB. Free memory was 47.8 MB in the beginning and 46.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:38,269 INFO L168 Benchmark]: Boogie Preprocessor took 41.11 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 45.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:00:38,269 INFO L168 Benchmark]: RCFGBuilder took 359.58 ms. Allocated memory is still 62.9 MB. Free memory was 45.2 MB in the beginning and 32.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:38,269 INFO L168 Benchmark]: TraceAbstraction took 20878.69 ms. Allocated memory was 62.9 MB in the beginning and 161.5 MB in the end (delta: 98.6 MB). Free memory was 31.6 MB in the beginning and 50.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:38,269 INFO L168 Benchmark]: Witness Printer took 78.21 ms. Allocated memory is still 161.5 MB. Free memory was 50.8 MB in the beginning and 44.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 05:00:38,271 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.62 ms. Allocated memory is still 50.3 MB. Free memory was 26.5 MB in the beginning and 27.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.54 ms. Allocated memory is still 62.9 MB. Free memory was 47.8 MB in the beginning and 46.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.11 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 45.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 359.58 ms. Allocated memory is still 62.9 MB. Free memory was 45.2 MB in the beginning and 32.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20878.69 ms. Allocated memory was 62.9 MB in the beginning and 161.5 MB in the end (delta: 98.6 MB). Free memory was 31.6 MB in the beginning and 50.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 83.2 MB. Max. memory is 16.1 GB. * Witness Printer took 78.21 ms. Allocated memory is still 161.5 MB. Free memory was 50.8 MB in the beginning and 44.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 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 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) VAL [counter=3] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=3] [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) VAL [counter=4] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=4] [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) VAL [counter=5] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=5] [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=6] [L35] COND FALSE !(!(x <= X)) VAL [counter=6] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=6] [L45] x++ VAL [counter=6] [L31] EXPR counter++ VAL [counter=7] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=7] [L35] COND FALSE !(!(x <= X)) VAL [counter=7] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=7] [L45] x++ VAL [counter=7] [L31] EXPR counter++ VAL [counter=8] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=8] [L35] COND FALSE !(!(x <= X)) VAL [counter=8] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=8] [L45] x++ VAL [counter=8] [L31] EXPR counter++ VAL [counter=9] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=9] [L35] COND FALSE !(!(x <= X)) VAL [counter=9] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=9] [L45] x++ VAL [counter=9] [L31] EXPR counter++ VAL [counter=10] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=10] [L35] COND FALSE !(!(x <= X)) VAL [counter=10] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=10] [L45] x++ VAL [counter=10] [L31] EXPR counter++ VAL [counter=11] [L31] COND FALSE !(counter++<10) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=11] [L16] reach_error() VAL [counter=11] - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 20733.5ms, OverallIterations: 24, TraceHistogramMax: 11, EmptinessCheckTime: 23.8ms, AutomataDifference: 3298.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 294 SDtfs, 303 SDslu, 1107 SDs, 0 SdLazy, 1310 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1359.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 652 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2509.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=23, InterpolantAutomatonStates: 251, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 139.8ms AutomataMinimizationTime, 23 MinimizatonAttempts, 109 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 213.0ms SsaConstructionTime, 1882.0ms SatisfiabilityAnalysisTime, 5348.1ms InterpolantComputationTime, 640 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 3646 SizeOfPredicates, 182 NumberOfNonLiveVariables, 2798 ConjunctsInSsa, 431 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 82/980 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 05:00:38,290 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...