./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/prodbin-ll_unwindbound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fed7c67fb4af67b211485b029d921a58b4b706dc ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 14:32:23,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 14:32:23,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 14:32:23,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 14:32:23,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 14:32:23,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 14:32:23,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 14:32:23,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 14:32:23,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 14:32:23,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 14:32:23,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 14:32:23,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 14:32:23,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 14:32:23,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 14:32:23,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 14:32:23,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 14:32:23,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 14:32:23,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 14:32:23,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 14:32:23,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 14:32:23,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 14:32:23,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 14:32:23,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 14:32:23,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 14:32:23,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 14:32:23,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 14:32:23,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 14:32:23,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 14:32:23,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 14:32:23,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 14:32:23,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 14:32:23,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 14:32:23,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 14:32:23,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 14:32:23,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 14:32:23,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 14:32:23,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 14:32:23,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 14:32:23,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 14:32:23,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 14:32:23,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 14:32:23,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 14:32:23,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 14:32:23,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 14:32:23,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 14:32:23,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 14:32:23,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 14:32:23,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 14:32:23,566 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 14:32:23,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 14:32:23,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 14:32:23,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 14:32:23,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 14:32:23,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 14:32:23,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 14:32:23,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 14:32:23,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 14:32:23,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:32:23,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 14:32:23,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 14:32:23,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 14:32:23,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 14:32:23,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 14:32:23,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 14:32:23,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 14:32:23,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fed7c67fb4af67b211485b029d921a58b4b706dc [2021-08-29 14:32:23,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 14:32:23,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 14:32:23,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 14:32:23,845 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 14:32:23,846 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 14:32:23,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-08-29 14:32:23,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f170e24a7/84a6e4237763417d90396f3d095ad1c5/FLAG85da523c5 [2021-08-29 14:32:24,178 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 14:32:24,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-08-29 14:32:24,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f170e24a7/84a6e4237763417d90396f3d095ad1c5/FLAG85da523c5 [2021-08-29 14:32:24,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f170e24a7/84a6e4237763417d90396f3d095ad1c5 [2021-08-29 14:32:24,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 14:32:24,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 14:32:24,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 14:32:24,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 14:32:24,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 14:32:24,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41322e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24, skipping insertion in model container [2021-08-29 14:32:24,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 14:32:24,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 14:32:24,743 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/prodbin-ll_unwindbound100.c[537,550] [2021-08-29 14:32:24,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:32:24,759 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 14:32:24,766 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/prodbin-ll_unwindbound100.c[537,550] [2021-08-29 14:32:24,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:32:24,781 INFO L208 MainTranslator]: Completed translation [2021-08-29 14:32:24,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24 WrapperNode [2021-08-29 14:32:24,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 14:32:24,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 14:32:24,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 14:32:24,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 14:32:24,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 14:32:24,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 14:32:24,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 14:32:24,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 14:32:24,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 14:32:24,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 14:32:24,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 14:32:24,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 14:32:24,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (1/1) ... [2021-08-29 14:32:24,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:32:24,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:24,870 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) [2021-08-29 14:32:24,884 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 [2021-08-29 14:32:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 14:32:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 14:32:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 14:32:24,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 14:32:25,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 14:32:25,032 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 14:32:25,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:32:25 BoogieIcfgContainer [2021-08-29 14:32:25,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 14:32:25,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 14:32:25,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 14:32:25,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 14:32:25,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:32:24" (1/3) ... [2021-08-29 14:32:25,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a16f168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:32:25, skipping insertion in model container [2021-08-29 14:32:25,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:32:24" (2/3) ... [2021-08-29 14:32:25,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a16f168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:32:25, skipping insertion in model container [2021-08-29 14:32:25,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:32:25" (3/3) ... [2021-08-29 14:32:25,038 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2021-08-29 14:32:25,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 14:32:25,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 14:32:25,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 14:32:25,077 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 [2021-08-29 14:32:25,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 14:32:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 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) [2021-08-29 14:32:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 14:32:25,088 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:25,088 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:25,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:25,097 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-08-29 14:32:25,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:25,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890079051] [2021-08-29 14:32:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:25,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:25,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:25,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890079051] [2021-08-29 14:32:25,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890079051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:32:25,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:32:25,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 14:32:25,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458089715] [2021-08-29 14:32:25,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 14:32:25,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:25,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 14:32:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:32:25,257 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:25,313 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-08-29 14:32:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:32:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-29 14:32:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:25,319 INFO L225 Difference]: With dead ends: 37 [2021-08-29 14:32:25,319 INFO L226 Difference]: Without dead ends: 16 [2021-08-29 14:32:25,321 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:32:25,324 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.20ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.24ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:25,324 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.20ms Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 46.24ms Time] [2021-08-29 14:32:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-29 14:32:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-29 14:32:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-29 14:32:25,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-08-29 14:32:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:25,368 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-29 14:32:25,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-29 14:32:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 14:32:25,368 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:25,369 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:25,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 14:32:25,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-29 14:32:25,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:25,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355135773] [2021-08-29 14:32:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:25,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:25,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:25,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797772992] [2021-08-29 14:32:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:25,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:25,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:25,381 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) [2021-08-29 14:32:25,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 14:32:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:25,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:32:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:32:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:25,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:32:25,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:25,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355135773] [2021-08-29 14:32:25,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:25,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797772992] [2021-08-29 14:32:25,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797772992] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:32:25,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:32:25,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 14:32:25,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819655843] [2021-08-29 14:32:25,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:32:25,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:32:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:32:25,504 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:25,559 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-08-29 14:32:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:32:25,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-29 14:32:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:25,560 INFO L225 Difference]: With dead ends: 33 [2021-08-29 14:32:25,560 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 14:32:25,561 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.60ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:32:25,562 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.04ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:25,563 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 42.04ms Time] [2021-08-29 14:32:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 14:32:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-08-29 14:32:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-08-29 14:32:25,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-08-29 14:32:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:25,572 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-08-29 14:32:25,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-08-29 14:32:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 14:32:25,575 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:25,576 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:25,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 14:32:25,788 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 [2021-08-29 14:32:25,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:25,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-08-29 14:32:25,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:25,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893161498] [2021-08-29 14:32:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:25,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:25,801 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:25,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732215145] [2021-08-29 14:32:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:25,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:25,807 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) [2021-08-29 14:32:25,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 14:32:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:25,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 14:32:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:32:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:25,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:32:25,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:25,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893161498] [2021-08-29 14:32:25,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:25,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732215145] [2021-08-29 14:32:25,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732215145] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:32:25,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:32:25,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 14:32:25,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371910120] [2021-08-29 14:32:25,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:32:25,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:32:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:32:25,865 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-08-29 14:32:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:25,892 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-08-29 14:32:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 14:32:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-08-29 14:32:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:25,893 INFO L225 Difference]: With dead ends: 23 [2021-08-29 14:32:25,893 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 14:32:25,893 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.87ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:32:25,894 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.42ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:25,894 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 24.42ms Time] [2021-08-29 14:32:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 14:32:25,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-29 14:32:25,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 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) [2021-08-29 14:32:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-29 14:32:25,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-08-29 14:32:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:25,897 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-29 14:32:25,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-08-29 14:32:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-29 14:32:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:32:25,898 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:25,898 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:25,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 14:32:26,121 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 [2021-08-29 14:32:26,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:26,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1415763136, now seen corresponding path program 1 times [2021-08-29 14:32:26,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:26,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636033887] [2021-08-29 14:32:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:26,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:26,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:26,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518855714] [2021-08-29 14:32:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:26,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:26,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:26,144 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) [2021-08-29 14:32:26,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 14:32:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:26,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 14:32:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:32:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:26,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:32:26,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:26,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636033887] [2021-08-29 14:32:26,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:26,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518855714] [2021-08-29 14:32:26,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518855714] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:32:26,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:32:26,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 14:32:26,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710866539] [2021-08-29 14:32:26,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 14:32:26,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 14:32:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:32:26,284 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:26,337 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-08-29 14:32:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:32:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 14:32:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:26,338 INFO L225 Difference]: With dead ends: 26 [2021-08-29 14:32:26,338 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 14:32:26,339 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.32ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:32:26,340 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.21ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:26,340 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 30.21ms Time] [2021-08-29 14:32:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 14:32:26,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-08-29 14:32:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-29 14:32:26,346 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-08-29 14:32:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:26,347 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-29 14:32:26,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-29 14:32:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 14:32:26,347 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:26,347 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:26,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 14:32:26,548 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 [2021-08-29 14:32:26,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:26,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:26,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-08-29 14:32:26,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:26,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964090007] [2021-08-29 14:32:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:26,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:26,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:26,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994571077] [2021-08-29 14:32:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:26,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:26,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:26,558 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) [2021-08-29 14:32:26,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 14:32:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:26,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 14:32:26,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:32:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:27,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:32:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:30,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:30,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964090007] [2021-08-29 14:32:30,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:30,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994571077] [2021-08-29 14:32:30,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994571077] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:32:30,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:32:30,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-29 14:32:30,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469366398] [2021-08-29 14:32:30,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 14:32:30,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 14:32:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2021-08-29 14:32:30,417 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2021-08-29 14:32:33,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:32:34,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:32:36,423 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:32:44,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:32:47,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:32:47,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:47,510 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-08-29 14:32:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-29 14:32:47,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) Word has length 14 [2021-08-29 14:32:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:47,511 INFO L225 Difference]: With dead ends: 59 [2021-08-29 14:32:47,511 INFO L226 Difference]: Without dead ends: 57 [2021-08-29 14:32:47,512 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 9801.08ms TimeCoverageRelationStatistics Valid=116, Invalid=303, Unknown=1, NotChecked=0, Total=420 [2021-08-29 14:32:47,512 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10175.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10211.10ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:47,513 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 216 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [25 Valid, 188 Invalid, 3 Unknown, 0 Unchecked, 10211.10ms Time] [2021-08-29 14:32:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-29 14:32:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-08-29 14:32:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 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) [2021-08-29 14:32:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-08-29 14:32:47,517 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 14 [2021-08-29 14:32:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:47,518 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-08-29 14:32:47,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2021-08-29 14:32:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-08-29 14:32:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 14:32:47,519 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:47,519 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:47,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 14:32:47,719 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 [2021-08-29 14:32:47,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2021-08-29 14:32:47,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:47,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413955105] [2021-08-29 14:32:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:47,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:47,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:47,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163704730] [2021-08-29 14:32:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:47,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:47,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:47,741 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) [2021-08-29 14:32:47,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 14:32:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:47,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-29 14:32:47,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:32:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:48,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:32:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:49,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:49,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413955105] [2021-08-29 14:32:49,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:49,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163704730] [2021-08-29 14:32:49,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163704730] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:32:49,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:32:49,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-29 14:32:49,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837847187] [2021-08-29 14:32:49,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 14:32:49,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 14:32:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-08-29 14:32:49,258 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 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) [2021-08-29 14:32:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:50,905 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2021-08-29 14:32:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 14:32:50,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 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 14 [2021-08-29 14:32:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:50,907 INFO L225 Difference]: With dead ends: 91 [2021-08-29 14:32:50,907 INFO L226 Difference]: Without dead ends: 85 [2021-08-29 14:32:50,907 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1475.15ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-08-29 14:32:50,908 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 181 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 448.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 474.30ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:50,908 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 0 Invalid, 270 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [68 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 474.30ms Time] [2021-08-29 14:32:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-29 14:32:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 39. [2021-08-29 14:32:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 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) [2021-08-29 14:32:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-08-29 14:32:50,913 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 14 [2021-08-29 14:32:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:50,914 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-08-29 14:32:50,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 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) [2021-08-29 14:32:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-08-29 14:32:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 14:32:50,914 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:50,915 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:50,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 14:32:51,121 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 [2021-08-29 14:32:51,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:51,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-08-29 14:32:51,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:51,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664750874] [2021-08-29 14:32:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:51,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:51,135 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:51,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537116485] [2021-08-29 14:32:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:51,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:51,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:51,138 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) [2021-08-29 14:32:51,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 14:32:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:51,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 14:32:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:32:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:51,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:32:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:51,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:51,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664750874] [2021-08-29 14:32:51,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:51,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537116485] [2021-08-29 14:32:51,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537116485] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:32:51,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:32:51,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-29 14:32:51,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554345241] [2021-08-29 14:32:51,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 14:32:51,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 14:32:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:32:51,265 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-08-29 14:32:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:51,335 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2021-08-29 14:32:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 14:32:51,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) Word has length 15 [2021-08-29 14:32:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:51,337 INFO L225 Difference]: With dead ends: 69 [2021-08-29 14:32:51,337 INFO L226 Difference]: Without dead ends: 65 [2021-08-29 14:32:51,337 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.81ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:32:51,341 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.59ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:51,341 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 47.59ms Time] [2021-08-29 14:32:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-29 14:32:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-08-29 14:32:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 56 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:32:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2021-08-29 14:32:51,358 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 15 [2021-08-29 14:32:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:51,359 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2021-08-29 14:32:51,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-08-29 14:32:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2021-08-29 14:32:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 14:32:51,360 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:51,360 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:51,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 14:32:51,576 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 [2021-08-29 14:32:51,576 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2021-08-29 14:32:51,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:51,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272176340] [2021-08-29 14:32:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:51,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:51,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:51,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214443448] [2021-08-29 14:32:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:51,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:51,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:51,595 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) [2021-08-29 14:32:51,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 14:32:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:51,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 14:32:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:32:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 14:32:51,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:32:51,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:51,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272176340] [2021-08-29 14:32:51,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:51,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214443448] [2021-08-29 14:32:51,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214443448] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:32:51,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:32:51,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 14:32:51,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216672239] [2021-08-29 14:32:51,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:32:51,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:32:51,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:32:51,730 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-08-29 14:32:53,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:32:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:32:53,779 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2021-08-29 14:32:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 14:32:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 14:32:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:32:53,780 INFO L225 Difference]: With dead ends: 64 [2021-08-29 14:32:53,780 INFO L226 Difference]: Without dead ends: 60 [2021-08-29 14:32:53,780 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.85ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:32:53,780 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2034.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.23ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 2040.84ms IncrementalHoareTripleChecker+Time [2021-08-29 14:32:53,781 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.23ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 1 Unknown, 18 Unchecked, 2040.84ms Time] [2021-08-29 14:32:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-29 14:32:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-08-29 14:32:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 56 states have internal predecessors, (65), 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) [2021-08-29 14:32:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-08-29 14:32:53,785 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 17 [2021-08-29 14:32:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:32:53,785 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-08-29 14:32:53,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-08-29 14:32:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-08-29 14:32:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 14:32:53,785 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:32:53,785 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:32:53,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 14:32:53,986 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 [2021-08-29 14:32:53,986 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:32:53,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:32:53,986 INFO L82 PathProgramCache]: Analyzing trace with hash 851400538, now seen corresponding path program 1 times [2021-08-29 14:32:53,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:32:53,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854338809] [2021-08-29 14:32:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:53,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:32:53,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:32:53,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144628462] [2021-08-29 14:32:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:32:53,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:32:53,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:32:53,999 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) [2021-08-29 14:32:54,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 14:32:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:32:54,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 14:32:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:02,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:33:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 14:33:14,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:14,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854338809] [2021-08-29 14:33:14,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:14,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144628462] [2021-08-29 14:33:14,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144628462] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:33:14,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:33:14,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 21 [2021-08-29 14:33:14,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216290453] [2021-08-29 14:33:14,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-29 14:33:14,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:14,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-29 14:33:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=324, Unknown=4, NotChecked=0, Total=420 [2021-08-29 14:33:14,757 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:19,296 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:33:25,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:33:26,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:33:28,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:33:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:43,693 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2021-08-29 14:33:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-29 14:33:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-29 14:33:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:43,694 INFO L225 Difference]: With dead ends: 140 [2021-08-29 14:33:43,694 INFO L226 Difference]: Without dead ends: 138 [2021-08-29 14:33:43,695 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 27864.59ms TimeCoverageRelationStatistics Valid=416, Invalid=1385, Unknown=5, NotChecked=0, Total=1806 [2021-08-29 14:33:43,695 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 45 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11863.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 11913.23ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:43,695 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 593 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [45 Valid, 478 Invalid, 2 Unknown, 68 Unchecked, 11913.23ms Time] [2021-08-29 14:33:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-29 14:33:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-08-29 14:33:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 74 states have internal predecessors, (89), 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) [2021-08-29 14:33:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2021-08-29 14:33:43,702 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 26 [2021-08-29 14:33:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:43,702 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2021-08-29 14:33:43,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2021-08-29 14:33:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-29 14:33:43,703 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:43,703 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:43,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:43,916 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 [2021-08-29 14:33:43,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:43,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1527755738, now seen corresponding path program 2 times [2021-08-29 14:33:43,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:43,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512835644] [2021-08-29 14:33:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:43,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:43,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:43,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822417246] [2021-08-29 14:33:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 14:33:43,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:43,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:43,924 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) [2021-08-29 14:33:43,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 14:33:44,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 14:33:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 14:33:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-29 14:33:44,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:34:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:34:05,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:34:39,779 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (div c_ULTIMATE.start_main_~y~0 2))) (let ((.cse0 (= (mod c_ULTIMATE.start_main_~y~0 2) 0)) (.cse2 (* .cse1 c_ULTIMATE.start_main_~x~0)) (.cse3 (* .cse1 (- 1))) (.cse4 (not (= c_ULTIMATE.start_main_~x~0 0)))) (and (or .cse0 (and (or (not (= 0 (mod (+ (* (- 2) .cse1 c_ULTIMATE.start_main_~x~0) (* c_ULTIMATE.start_main_~x~0 2)) (- 4)))) (not (= (mod (div (+ (* (- 2) .cse2) (* (- 2) c_ULTIMATE.start_main_~x~0)) (- 4)) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 2 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 5)) 2)) 2))) (<= 0 (+ (div (+ (- 1) .cse1) 2) 1))) .cse4)) (or (not .cse0) (and (or (not (= (mod (* 2 .cse1 c_ULTIMATE.start_main_~x~0) 4) 0)) (not (= (mod (div (* 2 .cse2) 4) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 3 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 6)) 2)) 2))) (<= 0 (+ (div (+ (- 2) .cse1) 2) 1))) .cse4))))) is different from false [2021-08-29 14:35:21,574 WARN L210 SmtUtils]: Spent 27.34s on a formula simplification that was a NOOP. DAG size: 79 [2021-08-29 14:35:24,055 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_ULTIMATE.start_main_~y~0 2))) (or (= c_ULTIMATE.start_main_~y~0 0) (let ((.cse1 (div c_ULTIMATE.start_main_~y~0 2))) (let ((.cse4 (= .cse5 0)) (.cse2 (* .cse1 c_ULTIMATE.start_main_~x~0)) (.cse3 (* .cse1 (- 1))) (.cse0 (not (= c_ULTIMATE.start_main_~x~0 0)))) (and (or (and .cse0 (or (not (= 0 (mod (+ (* (- 2) .cse1 c_ULTIMATE.start_main_~x~0) (* c_ULTIMATE.start_main_~x~0 2)) (- 4)))) (not (= (mod (div (+ (* (- 2) .cse2) (* (- 2) c_ULTIMATE.start_main_~x~0)) (- 4)) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 2 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 5)) 2)) 2))))) .cse4) (or (not .cse4) (and (or (not (= (mod (* 2 .cse1 c_ULTIMATE.start_main_~x~0) 4) 0)) (not (= (mod (div (* 2 .cse2) 4) c_ULTIMATE.start_main_~x~0) 0)) (<= (div (+ (- 1) (* (div (+ 3 .cse3) (- 2)) (- 1))) (- 2)) (+ 2 (div (+ (- 1) (div (+ .cse1 (- 6)) 2)) 2))) (<= 0 (+ (div (+ (- 2) .cse1) 2) 1))) .cse0))))) (and (= .cse5 1) (<= 0 c_ULTIMATE.start_main_~y~0)))) is different from false [2021-08-29 14:37:06,127 WARN L210 SmtUtils]: Spent 1.35m on a formula simplification that was a NOOP. DAG size: 129 [2021-08-29 14:37:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2021-08-29 14:37:18,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:37:18,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512835644] [2021-08-29 14:37:18,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:37:18,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822417246] [2021-08-29 14:37:18,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822417246] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:37:18,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:37:18,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 36 [2021-08-29 14:37:18,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58044853] [2021-08-29 14:37:18,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-29 14:37:18,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:37:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-29 14:37:18,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=920, Unknown=14, NotChecked=130, Total=1260 [2021-08-29 14:37:18,221 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 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) [2021-08-29 14:37:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:37:18,221 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-08-29 14:37:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:37:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 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 32 [2021-08-29 14:37:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:37:18,222 INFO L225 Difference]: With dead ends: 75 [2021-08-29 14:37:18,222 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 14:37:18,223 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 164265.78ms TimeCoverageRelationStatistics Valid=196, Invalid=920, Unknown=14, NotChecked=130, Total=1260 [2021-08-29 14:37:18,223 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-08-29 14:37:18,223 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-08-29 14:37:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 14:37:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 14:37:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:37:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 14:37:18,224 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-08-29 14:37:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:37:18,224 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 14:37:18,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 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) [2021-08-29 14:37:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 14:37:18,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 14:37:18,226 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 14:37:18,226 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 14:37:18,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 14:37:18,442 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 [2021-08-29 14:37:18,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 14:37:18,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:18,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:18,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:18,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:37:18,454 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-29 14:37:18,454 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 14:37:18,454 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 14:37:18,454 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 14:37:18,454 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-29 14:37:18,454 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 14:37:18,454 INFO L858 garLoopResultBuilder]: For program point L33-1(lines 33 44) no Hoare annotation was computed. [2021-08-29 14:37:18,455 INFO L854 garLoopResultBuilder]: At program point L33-3(lines 33 44) the Hoare annotation is: false [2021-08-29 14:37:18,455 INFO L858 garLoopResultBuilder]: For program point L33-4(lines 33 44) no Hoare annotation was computed. [2021-08-29 14:37:18,455 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-08-29 14:37:18,455 INFO L854 garLoopResultBuilder]: At program point L13-2(lines 35 36) the Hoare annotation is: false [2021-08-29 14:37:18,455 INFO L858 garLoopResultBuilder]: For program point L13-3(lines 13 16) no Hoare annotation was computed. [2021-08-29 14:37:18,455 INFO L858 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-08-29 14:37:18,455 INFO L861 garLoopResultBuilder]: At program point L13-5(lines 12 18) the Hoare annotation is: true [2021-08-29 14:37:18,455 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2021-08-29 14:37:18,455 INFO L858 garLoopResultBuilder]: For program point L38-2(lines 38 41) no Hoare annotation was computed. [2021-08-29 14:37:18,456 INFO L861 garLoopResultBuilder]: At program point L47(lines 21 48) the Hoare annotation is: true [2021-08-29 14:37:18,456 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-08-29 14:37:18,456 INFO L858 garLoopResultBuilder]: For program point L14-1(lines 14 15) no Hoare annotation was computed. [2021-08-29 14:37:18,456 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-08-29 14:37:18,458 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 14:37:18,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:37:18 BoogieIcfgContainer [2021-08-29 14:37:18,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 14:37:18,464 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 14:37:18,464 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 14:37:18,464 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 14:37:18,464 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:32:25" (3/4) ... [2021-08-29 14:37:18,466 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 14:37:18,472 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-29 14:37:18,473 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 14:37:18,473 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:37:18,473 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:37:18,503 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 14:37:18,503 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 14:37:18,503 INFO L158 Benchmark]: Toolchain (without parser) took 293865.45ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 39.9MB in the beginning and 50.4MB in the end (delta: -10.5MB). Peak memory consumption was 15.2MB. Max. memory is 16.1GB. [2021-08-29 14:37:18,504 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 60.8MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:37:18,504 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.18ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 45.4MB in the end (delta: -5.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 14:37:18,504 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.30ms. Allocated memory is still 60.8MB. Free memory was 45.4MB in the beginning and 43.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:37:18,504 INFO L158 Benchmark]: Boogie Preprocessor took 22.21ms. Allocated memory is still 60.8MB. Free memory was 43.7MB in the beginning and 42.7MB in the end (delta: 999.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:37:18,505 INFO L158 Benchmark]: RCFGBuilder took 182.18ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 34.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 14:37:18,505 INFO L158 Benchmark]: TraceAbstraction took 293429.35ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 33.7MB in the beginning and 52.5MB in the end (delta: -18.8MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2021-08-29 14:37:18,505 INFO L158 Benchmark]: Witness Printer took 39.14ms. Allocated memory is still 88.1MB. Free memory was 52.5MB in the beginning and 50.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:37:18,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 60.8MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.18ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 45.4MB in the end (delta: -5.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.30ms. Allocated memory is still 60.8MB. Free memory was 45.4MB in the beginning and 43.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.21ms. Allocated memory is still 60.8MB. Free memory was 43.7MB in the beginning and 42.7MB in the end (delta: 999.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 182.18ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 34.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 293429.35ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 33.7MB in the beginning and 52.5MB in the end (delta: -18.8MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * Witness Printer took 39.14ms. Allocated memory is still 88.1MB. Free memory was 52.5MB in the beginning and 50.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 293387.04ms, OverallIterations: 10, TraceHistogramMax: 5, EmptinessCheckTime: 10.99ms, AutomataDifference: 50063.98ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 11.26ms, InitialAbstractionConstructionTime: 5.50ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 417 SdHoareTripleChecker+Valid, 24829.98ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 417 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 24665.80ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 86 IncrementalHoareTripleChecker+Unchecked, 450 mSDsCounter, 147 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1183 IncrementalHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 147 mSolverCounterUnsat, 0 mSDtfsCounter, 1183 mSolverCounterSat, 10.00ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 301 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 149 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 203534.07ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=9, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 74.87ms AutomataMinimizationTime, 10 MinimizatonAttempts, 158 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 6 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 5.54ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.85ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 55.17ms SsaConstructionTime, 146.33ms SatisfiabilityAnalysisTime, 240677.38ms InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 240 ConstructedInterpolants, 12 QuantifiedInterpolants, 7203 SizeOfPredicates, 58 NumberOfNonLiveVariables, 796 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 29/170 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 14:37:18,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...