./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.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_unwindbound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c758affe4a0bff63c925ec1500c02afafd4840e .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 05:01:47,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 05:01:47,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 05:01:47,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 05:01:47,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 05:01:47,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 05:01:47,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 05:01:47,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 05:01:47,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 05:01:47,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 05:01:47,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 05:01:47,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 05:01:47,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 05:01:47,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 05:01:47,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 05:01:47,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 05:01:47,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 05:01:47,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 05:01:47,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 05:01:47,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 05:01:47,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 05:01:47,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 05:01:47,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 05:01:47,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 05:01:47,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 05:01:47,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 05:01:47,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 05:01:47,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 05:01:47,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 05:01:47,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 05:01:47,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 05:01:47,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 05:01:47,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 05:01:47,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 05:01:47,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 05:01:47,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 05:01:47,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 05:01:47,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 05:01:47,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 05:01:47,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 05:01:47,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 05:01:47,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 05:01:47,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 05:01:47,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 05:01:47,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 05:01:47,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 05:01:47,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 05:01:47,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 05:01:47,377 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 05:01:47,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 05:01:47,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 05:01:47,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 05:01:47,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 05:01:47,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 05:01:47,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 05:01:47,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 05:01:47,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 05:01:47,379 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 05:01:47,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 05:01:47,379 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 05:01:47,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 05:01:47,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 05:01:47,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 05:01:47,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 05:01:47,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:01:47,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 05:01:47,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 05:01:47,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 05:01:47,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 05:01:47,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 05:01:47,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 05:01:47,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 05:01:47,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c758affe4a0bff63c925ec1500c02afafd4840e [2021-08-26 05:01:47,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 05:01:47,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 05:01:47,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 05:01:47,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 05:01:47,728 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 05:01:47,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-08-26 05:01:47,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5085bd2f0/042fed98a2374333af18d24b2fb080d6/FLAGaae0d4828 [2021-08-26 05:01:48,161 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 05:01:48,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-08-26 05:01:48,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5085bd2f0/042fed98a2374333af18d24b2fb080d6/FLAGaae0d4828 [2021-08-26 05:01:48,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5085bd2f0/042fed98a2374333af18d24b2fb080d6 [2021-08-26 05:01:48,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 05:01:48,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 05:01:48,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 05:01:48,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 05:01:48,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 05:01:48,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb0dee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48, skipping insertion in model container [2021-08-26 05:01:48,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 05:01:48,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 05:01:48,724 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_unwindbound5.c[597,610] [2021-08-26 05:01:48,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:01:48,762 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 05:01:48,780 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_unwindbound5.c[597,610] [2021-08-26 05:01:48,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:01:48,816 INFO L208 MainTranslator]: Completed translation [2021-08-26 05:01:48,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48 WrapperNode [2021-08-26 05:01:48,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 05:01:48,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 05:01:48,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 05:01:48,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 05:01:48,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 05:01:48,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 05:01:48,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 05:01:48,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 05:01:48,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 05:01:48,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 05:01:48,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 05:01:48,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 05:01:48,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (1/1) ... [2021-08-26 05:01:48,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:01:48,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:48,942 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 05:01:48,968 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 05:01:48,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 05:01:48,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 05:01:48,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 05:01:48,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 05:01:49,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 05:01:49,276 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 05:01:49,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:01:49 BoogieIcfgContainer [2021-08-26 05:01:49,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 05:01:49,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 05:01:49,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 05:01:49,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 05:01:49,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:01:48" (1/3) ... [2021-08-26 05:01:49,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:01:49, skipping insertion in model container [2021-08-26 05:01:49,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:01:48" (2/3) ... [2021-08-26 05:01:49,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc4e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:01:49, skipping insertion in model container [2021-08-26 05:01:49,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:01:49" (3/3) ... [2021-08-26 05:01:49,294 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2021-08-26 05:01:49,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 05:01:49,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 05:01:49,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 05:01:49,387 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 05:01:49,391 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 05:01:49,405 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 05:01:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 05:01:49,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:49,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 05:01:49,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-08-26 05:01:49,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:49,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985142552] [2021-08-26 05:01:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:49,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:49,574 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 05:01:49,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:49,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985142552] [2021-08-26 05:01:49,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985142552] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:01:49,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:01:49,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 05:01:49,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449465936] [2021-08-26 05:01:49,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 05:01:49,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 05:01:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:01:49,614 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 05:01:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:49,625 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-08-26 05:01:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 05:01:49,626 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 05:01:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:49,632 INFO L225 Difference]: With dead ends: 34 [2021-08-26 05:01:49,633 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 05:01:49,635 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 05:01:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 05:01:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-26 05:01:49,657 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 05:01:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-26 05:01:49,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-08-26 05:01:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:49,660 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-26 05:01:49,660 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 05:01:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-26 05:01:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 05:01:49,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:49,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 05:01:49,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 05:01:49,661 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-08-26 05:01:49,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:49,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643741406] [2021-08-26 05:01:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:49,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:49,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:49,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715183520] [2021-08-26 05:01:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:49,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:49,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:49,696 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 05:01:49,697 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 05:01:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:49,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:01:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:49,934 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 05:01:49,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:49,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643741406] [2021-08-26 05:01:49,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:49,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715183520] [2021-08-26 05:01:49,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715183520] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:01:49,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:01:49,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:01:49,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056735632] [2021-08-26 05:01:49,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:01:49,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:01:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:01:49,939 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 05:01:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:50,003 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-08-26 05:01:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:01:50,004 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 05:01:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:50,004 INFO L225 Difference]: With dead ends: 30 [2021-08-26 05:01:50,005 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 05:01:50,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:01:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 05:01:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-08-26 05:01:50,013 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 05:01:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-26 05:01:50,015 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-08-26 05:01:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:50,015 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-26 05:01:50,015 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 05:01:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-26 05:01:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 05:01:50,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:50,017 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:50,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 05:01:50,237 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 05:01:50,237 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:50,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-08-26 05:01:50,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:50,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451977850] [2021-08-26 05:01:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:50,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:50,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:50,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067891961] [2021-08-26 05:01:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:50,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:50,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:50,250 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 05:01:50,256 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 05:01:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:50,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 05:01:50,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:50,648 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 05:01:50,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:50,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451977850] [2021-08-26 05:01:50,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:50,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067891961] [2021-08-26 05:01:50,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067891961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:50,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:50,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:01:50,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554830413] [2021-08-26 05:01:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:01:50,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:01:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:01:50,651 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 05:01:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:50,781 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-08-26 05:01:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:01:50,785 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 05:01:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:50,788 INFO L225 Difference]: With dead ends: 35 [2021-08-26 05:01:50,788 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 05:01:50,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:01:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 05:01:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-26 05:01:50,795 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 05:01:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-26 05:01:50,795 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-26 05:01:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:50,796 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-26 05:01:50,796 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 05:01:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-26 05:01:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 05:01:50,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:50,797 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:50,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 05:01:51,000 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 05:01:51,001 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-08-26 05:01:51,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:51,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087262703] [2021-08-26 05:01:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:51,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:51,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:51,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624766898] [2021-08-26 05:01:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:51,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:51,019 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 05:01:51,019 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 05:01:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 05:01:51,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:51,448 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 05:01:51,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:51,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087262703] [2021-08-26 05:01:51,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:51,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624766898] [2021-08-26 05:01:51,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624766898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:51,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:51,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:01:51,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215938994] [2021-08-26 05:01:51,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:01:51,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:01:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:01:51,452 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 05:01:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:51,563 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-08-26 05:01:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:01:51,564 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 05:01:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:51,566 INFO L225 Difference]: With dead ends: 39 [2021-08-26 05:01:51,566 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 05:01:51,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:01:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 05:01:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-08-26 05:01:51,572 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 05:01:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-08-26 05:01:51,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-08-26 05:01:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:51,575 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-08-26 05:01:51,575 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 05:01:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-08-26 05:01:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 05:01:51,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:51,577 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:51,605 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 05:01:51,792 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 05:01:51,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-08-26 05:01:51,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:51,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73748409] [2021-08-26 05:01:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:51,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:51,802 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:51,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037057509] [2021-08-26 05:01:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:51,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:51,807 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 05:01:51,811 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 05:01:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 05:01:51,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:51,948 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 05:01:51,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:51,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73748409] [2021-08-26 05:01:51,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:51,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037057509] [2021-08-26 05:01:51,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037057509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:51,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:51,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-26 05:01:51,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103958997] [2021-08-26 05:01:51,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:01:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:51,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:01:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:01:51,966 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 05:01:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:51,986 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-08-26 05:01:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:01:51,987 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 05:01:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:51,987 INFO L225 Difference]: With dead ends: 32 [2021-08-26 05:01:51,987 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 05:01:51,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:01:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 05:01:51,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 05:01:51,991 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 05:01:51,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-08-26 05:01:51,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-08-26 05:01:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:51,992 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-08-26 05:01:51,992 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 05:01:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-08-26 05:01:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 05:01:51,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:51,993 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:52,019 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 05:01:52,216 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 05:01:52,216 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-08-26 05:01:52,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:52,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944669388] [2021-08-26 05:01:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:52,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:52,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:52,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015602490] [2021-08-26 05:01:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:52,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:52,228 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 05:01:52,229 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 05:01:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 05:01:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:52,699 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 05:01:52,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944669388] [2021-08-26 05:01:52,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015602490] [2021-08-26 05:01:52,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015602490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:52,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:52,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:01:52,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692548967] [2021-08-26 05:01:52,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:01:52,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:52,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:01:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:01:52,702 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 05:01:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:52,830 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-08-26 05:01:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:01:52,830 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 05:01:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:52,831 INFO L225 Difference]: With dead ends: 38 [2021-08-26 05:01:52,831 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 05:01:52,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:01:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 05:01:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-08-26 05:01:52,834 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 05:01:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-26 05:01:52,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-08-26 05:01:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:52,835 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-26 05:01:52,835 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 05:01:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-26 05:01:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:01:52,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:52,836 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-26 05:01:52,863 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 05:01:53,057 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 05:01:53,057 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-08-26 05:01:53,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:53,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937673935] [2021-08-26 05:01:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:53,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:53,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:53,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584638943] [2021-08-26 05:01:53,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:01:53,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:53,085 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 05:01:53,101 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 05:01:53,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:01:53,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:01:53,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 05:01:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:53,524 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 05:01:53,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:53,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937673935] [2021-08-26 05:01:53,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:53,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584638943] [2021-08-26 05:01:53,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584638943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:53,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:53,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:01:53,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212899398] [2021-08-26 05:01:53,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:01:53,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:01:53,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:01:53,531 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 05:01:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:53,701 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-08-26 05:01:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:01:53,702 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 05:01:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:53,704 INFO L225 Difference]: With dead ends: 46 [2021-08-26 05:01:53,704 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 05:01:53,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:01:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 05:01:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-08-26 05:01:53,713 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 05:01:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-26 05:01:53,716 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-08-26 05:01:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:53,716 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-26 05:01:53,717 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 05:01:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-26 05:01:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:01:53,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:53,718 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:53,746 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 05:01:53,932 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 05:01:53,933 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-08-26 05:01:53,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:53,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140968585] [2021-08-26 05:01:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:53,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:53,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:53,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55963186] [2021-08-26 05:01:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:53,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:53,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:53,949 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 05:01:53,951 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 05:01:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 05:01:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:54,679 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 05:01:54,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:54,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140968585] [2021-08-26 05:01:54,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:54,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55963186] [2021-08-26 05:01:54,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55963186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:54,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:54,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:01:54,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284681157] [2021-08-26 05:01:54,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:01:54,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:01:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:01:54,682 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 05:01:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:55,357 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-08-26 05:01:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:01:55,357 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 05:01:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:55,358 INFO L225 Difference]: With dead ends: 60 [2021-08-26 05:01:55,358 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 05:01:55,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-26 05:01:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 05:01:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-08-26 05:01:55,362 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 05:01:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-08-26 05:01:55,363 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-08-26 05:01:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:55,363 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-08-26 05:01:55,363 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 05:01:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-08-26 05:01:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:01:55,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:55,364 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:55,390 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 05:01:55,564 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 05:01:55,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -701540760, now seen corresponding path program 2 times [2021-08-26 05:01:55,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:55,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619601162] [2021-08-26 05:01:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:55,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:55,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:55,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659551591] [2021-08-26 05:01:55,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:01:55,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:55,583 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 05:01:55,621 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 05:01:55,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:01:55,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:01:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 05:01:55,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:56,003 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 05:01:56,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:56,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619601162] [2021-08-26 05:01:56,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:56,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659551591] [2021-08-26 05:01:56,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659551591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:56,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:56,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:01:56,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688808131] [2021-08-26 05:01:56,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:01:56,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:01:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:01:56,006 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 05:01:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:56,185 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-08-26 05:01:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:01:56,185 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 05:01:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:56,187 INFO L225 Difference]: With dead ends: 57 [2021-08-26 05:01:56,187 INFO L226 Difference]: Without dead ends: 55 [2021-08-26 05:01:56,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:01:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-26 05:01:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-08-26 05:01:56,191 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 05:01:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-08-26 05:01:56,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2021-08-26 05:01:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:56,192 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-08-26 05:01:56,192 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 05:01:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-08-26 05:01:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:01:56,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:56,199 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-26 05:01:56,224 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 05:01:56,412 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 05:01:56,413 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:56,413 INFO L82 PathProgramCache]: Analyzing trace with hash -758799062, now seen corresponding path program 2 times [2021-08-26 05:01:56,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:56,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204153368] [2021-08-26 05:01:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:56,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:56,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:56,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382412195] [2021-08-26 05:01:56,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:01:56,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:56,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:56,424 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 05:01:56,469 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 05:01:56,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:01:56,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:01:56,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 05:01:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:56,939 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 05:01:56,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:56,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204153368] [2021-08-26 05:01:56,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:56,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382412195] [2021-08-26 05:01:56,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382412195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:56,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:56,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:01:56,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294738130] [2021-08-26 05:01:56,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:01:56,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:56,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:01:56,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:01:56,942 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 05:01:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:57,232 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-08-26 05:01:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:01:57,232 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 05:01:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:57,233 INFO L225 Difference]: With dead ends: 60 [2021-08-26 05:01:57,233 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 05:01:57,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:01:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 05:01:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-08-26 05:01:57,238 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 05:01:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-08-26 05:01:57,238 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2021-08-26 05:01:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:57,238 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-08-26 05:01:57,239 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 05:01:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-08-26 05:01:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 05:01:57,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:57,239 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:57,263 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 05:01:57,449 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 05:01:57,449 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-08-26 05:01:57,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:57,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861909961] [2021-08-26 05:01:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:57,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:57,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:57,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717078502] [2021-08-26 05:01:57,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:01:57,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:57,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:57,460 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 05:01:57,481 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 05:01:57,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:01:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:01:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:01:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:57,738 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 05:01:57,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:57,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861909961] [2021-08-26 05:01:57,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:57,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717078502] [2021-08-26 05:01:57,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717078502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:57,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:57,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:01:57,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174608758] [2021-08-26 05:01:57,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:01:57,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:01:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:01:57,741 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 05:01:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:57,767 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-08-26 05:01:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:01:57,767 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 05:01:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:57,768 INFO L225 Difference]: With dead ends: 50 [2021-08-26 05:01:57,768 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 05:01:57,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:01:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 05:01:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-26 05:01:57,772 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 05:01:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-08-26 05:01:57,773 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2021-08-26 05:01:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:57,773 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-08-26 05:01:57,773 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 05:01:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-08-26 05:01:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 05:01:57,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:57,774 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:57,801 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 05:01:58,001 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 05:01:58,002 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1564888737, now seen corresponding path program 2 times [2021-08-26 05:01:58,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:58,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371867465] [2021-08-26 05:01:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:58,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:58,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:58,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112600521] [2021-08-26 05:01:58,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:01:58,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:58,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:58,031 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 05:01:58,032 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 05:01:58,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:01:58,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:01:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 05:01:58,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:58,698 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 05:01:58,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:58,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371867465] [2021-08-26 05:01:58,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:58,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112600521] [2021-08-26 05:01:58,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112600521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:58,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:58,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:01:58,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444706775] [2021-08-26 05:01:58,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:01:58,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:58,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:01:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:01:58,701 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 05:01:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:58,951 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-08-26 05:01:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:01:58,952 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 05:01:58,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:58,952 INFO L225 Difference]: With dead ends: 61 [2021-08-26 05:01:58,952 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 05:01:58,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:01:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 05:01:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-08-26 05:01:58,957 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 05:01:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-08-26 05:01:58,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2021-08-26 05:01:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:58,958 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-08-26 05:01:58,958 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 05:01:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-08-26 05:01:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 05:01:58,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:58,959 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:01:58,971 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 05:01:59,165 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 05:01:59,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash -285025059, now seen corresponding path program 1 times [2021-08-26 05:01:59,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:59,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556040940] [2021-08-26 05:01:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:59,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:59,172 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:59,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392338485] [2021-08-26 05:01:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:59,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:59,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:59,178 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 05:01:59,179 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 05:01:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:01:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 05:01:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:01:59,570 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 05:01:59,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:01:59,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556040940] [2021-08-26 05:01:59,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:01:59,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392338485] [2021-08-26 05:01:59,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392338485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:01:59,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:01:59,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:01:59,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121935934] [2021-08-26 05:01:59,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:01:59,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:01:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:01:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:01:59,573 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 05:01:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:01:59,747 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-08-26 05:01:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:01:59,748 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 05:01:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:01:59,748 INFO L225 Difference]: With dead ends: 53 [2021-08-26 05:01:59,748 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 05:01:59,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:01:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 05:01:59,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-08-26 05:01:59,752 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 05:01:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-08-26 05:01:59,752 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-08-26 05:01:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:01:59,752 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-08-26 05:01:59,753 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 05:01:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-08-26 05:01:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 05:01:59,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:01:59,753 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-08-26 05:01:59,780 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 05:01:59,953 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 05:01:59,954 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:01:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:01:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash -429625836, now seen corresponding path program 3 times [2021-08-26 05:01:59,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:01:59,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985507417] [2021-08-26 05:01:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:01:59,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:01:59,968 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:01:59,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712824834] [2021-08-26 05:01:59,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:01:59,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:01:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:01:59,970 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 05:01:59,971 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 05:02:00,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:02:00,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:02:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 05:02:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:02:00,797 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 05:02:00,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:02:00,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985507417] [2021-08-26 05:02:00,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:02:00,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712824834] [2021-08-26 05:02:00,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712824834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:02:00,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:02:00,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:02:00,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960892089] [2021-08-26 05:02:00,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:02:00,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:02:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:02:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:02:00,800 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 05:02:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:02:01,049 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-08-26 05:02:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 05:02:01,050 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 05:02:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:02:01,050 INFO L225 Difference]: With dead ends: 64 [2021-08-26 05:02:01,050 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 05:02:01,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:02:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 05:02:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-08-26 05:02:01,054 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 05:02:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-08-26 05:02:01,055 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-08-26 05:02:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:02:01,055 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-08-26 05:02:01,055 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 05:02:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-08-26 05:02:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 05:02:01,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:02:01,056 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-08-26 05:02:01,070 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 05:02:01,268 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 05:02:01,268 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:02:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:02:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash -486884138, now seen corresponding path program 3 times [2021-08-26 05:02:01,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:02:01,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102351919] [2021-08-26 05:02:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:02:01,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:02:01,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:02:01,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33123022] [2021-08-26 05:02:01,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:02:01,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:02:01,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:02:01,283 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 05:02:01,284 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 05:02:01,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:02:01,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:02:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 05:02:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:02:01,656 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 05:02:01,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:02:01,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102351919] [2021-08-26 05:02:01,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:02:01,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33123022] [2021-08-26 05:02:01,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33123022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:02:01,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:02:01,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:02:01,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11419923] [2021-08-26 05:02:01,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:02:01,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:02:01,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:02:01,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:02:01,659 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 05:02:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:02:01,793 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-08-26 05:02:01,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:02:01,794 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 05:02:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:02:01,794 INFO L225 Difference]: With dead ends: 47 [2021-08-26 05:02:01,794 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 05:02:01,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:02:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 05:02:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-08-26 05:02:01,798 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 05:02:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-08-26 05:02:01,799 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-08-26 05:02:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:02:01,799 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-08-26 05:02:01,799 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 05:02:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-08-26 05:02:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 05:02:01,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:02:01,800 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 05:02:01,826 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 05:02:02,016 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 05:02:02,017 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:02:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:02:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash -433535720, now seen corresponding path program 3 times [2021-08-26 05:02:02,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:02:02,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155594825] [2021-08-26 05:02:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:02:02,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:02:02,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:02:02,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990504653] [2021-08-26 05:02:02,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:02:02,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:02:02,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:02:02,027 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 05:02:02,029 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 05:02:02,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 05:02:02,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:02:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:02:02,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:02:02,366 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 05:02:02,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:02:02,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155594825] [2021-08-26 05:02:02,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:02:02,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990504653] [2021-08-26 05:02:02,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990504653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:02:02,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:02:02,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:02:02,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052216873] [2021-08-26 05:02:02,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:02:02,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:02:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:02:02,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:02:02,369 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 05:02:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:02:02,404 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-08-26 05:02:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:02:02,405 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 05:02:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:02:02,406 INFO L225 Difference]: With dead ends: 48 [2021-08-26 05:02:02,406 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 05:02:02,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:02:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 05:02:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-26 05:02:02,409 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 05:02:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-08-26 05:02:02,410 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-08-26 05:02:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:02:02,410 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-08-26 05:02:02,410 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 05:02:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-08-26 05:02:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 05:02:02,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:02:02,411 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 05:02:02,438 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 05:02:02,630 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 05:02:02,630 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:02:02,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:02:02,630 INFO L82 PathProgramCache]: Analyzing trace with hash 24155569, now seen corresponding path program 3 times [2021-08-26 05:02:02,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:02:02,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625688248] [2021-08-26 05:02:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:02:02,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:02:02,637 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:02:02,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081131222] [2021-08-26 05:02:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:02:02,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:02:02,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:02:02,640 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 05:02:02,641 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 05:02:03,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:02:03,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:02:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 05:02:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:02:03,551 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 05:02:03,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:02:03,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625688248] [2021-08-26 05:02:03,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:02:03,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081131222] [2021-08-26 05:02:03,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081131222] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:02:03,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:02:03,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 05:02:03,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529496947] [2021-08-26 05:02:03,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:02:03,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:02:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:02:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:02:03,554 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 05:02:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:02:03,674 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-08-26 05:02:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:02:03,674 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 05:02:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:02:03,675 INFO L225 Difference]: With dead ends: 48 [2021-08-26 05:02:03,675 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 05:02:03,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:02:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 05:02:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-26 05:02:03,678 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 05:02:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-08-26 05:02:03,679 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2021-08-26 05:02:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:02:03,679 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-08-26 05:02:03,679 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 05:02:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-08-26 05:02:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 05:02:03,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:02:03,680 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 05:02:03,699 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 05:02:03,890 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 05:02:03,890 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:02:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:02:03,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1957613462, now seen corresponding path program 4 times [2021-08-26 05:02:03,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:02:03,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799477662] [2021-08-26 05:02:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:02:03,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:02:03,910 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:02:03,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121516438] [2021-08-26 05:02:03,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:02:03,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:02:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:02:03,912 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 05:02:03,937 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 05:02:04,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:02:04,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:02:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:02:04,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:02:04,327 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 05:02:04,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:02:04,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799477662] [2021-08-26 05:02:04,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:02:04,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121516438] [2021-08-26 05:02:04,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121516438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:02:04,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:02:04,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:02:04,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354630735] [2021-08-26 05:02:04,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:02:04,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:02:04,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:02:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:02:04,330 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 05:02:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:02:04,378 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-26 05:02:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 05:02:04,378 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 05:02:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:02:04,379 INFO L225 Difference]: With dead ends: 54 [2021-08-26 05:02:04,379 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 05:02:04,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:02:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 05:02:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-26 05:02:04,383 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 05:02:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-08-26 05:02:04,383 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-08-26 05:02:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:02:04,384 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-08-26 05:02:04,384 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 05:02:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-08-26 05:02:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 05:02:04,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:02:04,385 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 05:02:04,412 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 05:02:04,608 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 05:02:04,609 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 05:02:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:02:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -553888196, now seen corresponding path program 5 times [2021-08-26 05:02:04,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:02:04,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111850105] [2021-08-26 05:02:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:02:04,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:02:04,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:02:04,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967141199] [2021-08-26 05:02:04,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 05:02:04,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:02:04,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:02:04,630 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 05:02:04,631 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 05:02:04,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 05:02:04,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-26 05:02:04,975 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 05:02:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 05:02:05,079 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 05:02:05,080 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 05:02:05,080 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:02:05,082 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:02:05,091 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 05:02:05,288 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 05:02:05,293 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 05:02:05,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:02:05 BoogieIcfgContainer [2021-08-26 05:02:05,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 05:02:05,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 05:02:05,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 05:02:05,347 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 05:02:05,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:01:49" (3/4) ... [2021-08-26 05:02:05,351 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 05:02:05,410 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 05:02:05,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 05:02:05,412 INFO L168 Benchmark]: Toolchain (without parser) took 16825.50 ms. Allocated memory was 54.5 MB in the beginning and 119.5 MB in the end (delta: 65.0 MB). Free memory was 32.7 MB in the beginning and 75.5 MB in the end (delta: -42.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-08-26 05:02:05,412 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 35.8 MB in the beginning and 35.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:02:05,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.52 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 37.8 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 05:02:05,414 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.01 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:02:05,414 INFO L168 Benchmark]: Boogie Preprocessor took 37.58 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 35.2 MB in the end (delta: 942.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:02:05,414 INFO L168 Benchmark]: RCFGBuilder took 371.35 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 22.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 05:02:05,415 INFO L168 Benchmark]: TraceAbstraction took 16058.35 ms. Allocated memory was 67.1 MB in the beginning and 119.5 MB in the end (delta: 52.4 MB). Free memory was 49.5 MB in the beginning and 78.6 MB in the end (delta: -29.1 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-08-26 05:02:05,415 INFO L168 Benchmark]: Witness Printer took 63.38 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 75.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:02:05,417 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 35.8 MB in the beginning and 35.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.52 ms. Allocated memory is still 54.5 MB. Free memory was 32.5 MB in the beginning and 37.8 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.01 ms. Allocated memory is still 54.5 MB. Free memory was 37.7 MB in the beginning and 36.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.58 ms. Allocated memory is still 54.5 MB. Free memory was 36.1 MB in the beginning and 35.2 MB in the end (delta: 942.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 371.35 ms. Allocated memory is still 54.5 MB. Free memory was 35.0 MB in the beginning and 22.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16058.35 ms. Allocated memory was 67.1 MB in the beginning and 119.5 MB in the end (delta: 52.4 MB). Free memory was 49.5 MB in the beginning and 78.6 MB in the end (delta: -29.1 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. * Witness Printer took 63.38 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 75.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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++<5 [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++<5 [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++<5 [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++<5 [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++<5 [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 FALSE !(counter++<5) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=6] [L16] reach_error() VAL [counter=6] - 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: 15912.4ms, OverallIterations: 19, TraceHistogramMax: 6, EmptinessCheckTime: 24.7ms, AutomataDifference: 2904.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 239 SDtfs, 231 SDslu, 798 SDs, 0 SdLazy, 1200 SolverSat, 124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1362.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 377 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2027.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=18, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 98.6ms AutomataMinimizationTime, 18 MinimizatonAttempts, 109 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 154.7ms SsaConstructionTime, 1431.7ms SatisfiabilityAnalysisTime, 4198.8ms InterpolantComputationTime, 365 NumberOfCodeBlocks, 329 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 2956 SizeOfPredicates, 147 NumberOfNonLiveVariables, 1713 ConjunctsInSsa, 346 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 82/250 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 05:02:05,431 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...