./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.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/loop-lit/gj2007.c.i.p+lhb-reducer.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 e4be225ddf5726de15d96df20c7b0d434801c413 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 11:00:50,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:00:50,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:00:50,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:00:50,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:00:50,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:00:50,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:00:50,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:00:50,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:00:50,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:00:50,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:00:50,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:00:50,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:00:50,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:00:50,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:00:50,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:00:50,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:00:50,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:00:50,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:00:50,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:00:50,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:00:50,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:00:50,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:00:50,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:00:50,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:00:50,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:00:50,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:00:50,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:00:50,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:00:50,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:00:50,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:00:50,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:00:50,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:00:50,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:00:50,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:00:50,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:00:50,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:00:50,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:00:50,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:00:50,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:00:50,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:00:50,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:00:50,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:00:50,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:00:50,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:00:50,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:00:50,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:00:50,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:00:50,796 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:00:50,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:00:50,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:00:50,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:00:50,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:00:50,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:00:50,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:00:50,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:00:50,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:00:50,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:00:50,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:00:50,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:00:50,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:00:50,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:00:50,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:00:50,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4be225ddf5726de15d96df20c7b0d434801c413 [2021-08-29 11:00:51,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:00:51,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:00:51,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:00:51,127 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:00:51,127 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:00:51,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-08-29 11:00:51,185 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1094d11d5/8fd85401735a42ba966a38a22ca67d7b/FLAG6adfade20 [2021-08-29 11:00:51,583 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:00:51,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2021-08-29 11:00:51,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1094d11d5/8fd85401735a42ba966a38a22ca67d7b/FLAG6adfade20 [2021-08-29 11:00:51,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1094d11d5/8fd85401735a42ba966a38a22ca67d7b [2021-08-29 11:00:51,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:00:51,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:00:51,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:00:51,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:00:51,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:00:51,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f21855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51, skipping insertion in model container [2021-08-29 11:00:51,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:00:51,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:00:51,763 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-08-29 11:00:51,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:00:51,793 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:00:51,830 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2021-08-29 11:00:51,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:00:51,844 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:00:51,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51 WrapperNode [2021-08-29 11:00:51,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:00:51,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:00:51,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:00:51,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:00:51,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:00:51,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:00:51,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:00:51,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:00:51,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:00:51,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:00:51,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:00:51,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:00:51,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (1/1) ... [2021-08-29 11:00:51,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:00:51,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:51,953 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 11:00:51,998 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 11:00:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:00:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:00:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:00:52,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:00:52,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:00:52,107 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 11:00:52,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:00:52 BoogieIcfgContainer [2021-08-29 11:00:52,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:00:52,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:00:52,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:00:52,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:00:52,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:00:51" (1/3) ... [2021-08-29 11:00:52,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6734942b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:00:52, skipping insertion in model container [2021-08-29 11:00:52,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:00:51" (2/3) ... [2021-08-29 11:00:52,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6734942b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:00:52, skipping insertion in model container [2021-08-29 11:00:52,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:00:52" (3/3) ... [2021-08-29 11:00:52,123 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2021-08-29 11:00:52,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:00:52,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 11:00:52,155 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:00:52,161 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 11:00:52,161 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 11:00:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 11:00:52,173 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:52,173 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:52,174 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:52,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1745867070, now seen corresponding path program 1 times [2021-08-29 11:00:52,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:52,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061924989] [2021-08-29 11:00:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:52,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:52,370 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 11:00:52,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:52,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061924989] [2021-08-29 11:00:52,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061924989] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:52,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:52,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:00:52,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681348750] [2021-08-29 11:00:52,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:00:52,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:52,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:00:52,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:52,395 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 11:00:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:52,477 INFO L93 Difference]: Finished difference Result 52 states and 90 transitions. [2021-08-29 11:00:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:00:52,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-08-29 11:00:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:52,485 INFO L225 Difference]: With dead ends: 52 [2021-08-29 11:00:52,485 INFO L226 Difference]: Without dead ends: 25 [2021-08-29 11:00:52,487 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.69ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:52,489 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.09ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:52,489 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 69.09ms Time] [2021-08-29 11:00:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-29 11:00:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-29 11:00:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-08-29 11:00:52,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2021-08-29 11:00:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:52,520 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-08-29 11:00:52,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 11:00:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-08-29 11:00:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 11:00:52,521 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:52,521 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:52,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 11:00:52,522 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash -936932661, now seen corresponding path program 1 times [2021-08-29 11:00:52,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:52,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646124526] [2021-08-29 11:00:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:52,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:52,553 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 11:00:52,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:52,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646124526] [2021-08-29 11:00:52,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646124526] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:52,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:52,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 11:00:52,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908513822] [2021-08-29 11:00:52,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 11:00:52,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 11:00:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:00:52,556 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 11:00:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:52,613 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2021-08-29 11:00:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 11:00:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 23 [2021-08-29 11:00:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:52,614 INFO L225 Difference]: With dead ends: 44 [2021-08-29 11:00:52,614 INFO L226 Difference]: Without dead ends: 25 [2021-08-29 11:00:52,615 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.18ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:00:52,616 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.65ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:52,616 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 49.65ms Time] [2021-08-29 11:00:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-29 11:00:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-29 11:00:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 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 11:00:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-08-29 11:00:52,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2021-08-29 11:00:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:52,620 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-08-29 11:00:52,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 11:00:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-08-29 11:00:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 11:00:52,621 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:52,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:52,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 11:00:52,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2008089875, now seen corresponding path program 1 times [2021-08-29 11:00:52,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:52,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097868004] [2021-08-29 11:00:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:52,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:52,662 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 11:00:52,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:52,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097868004] [2021-08-29 11:00:52,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097868004] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:52,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:52,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:00:52,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546007923] [2021-08-29 11:00:52,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:00:52,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:00:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:52,665 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 11:00:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:52,725 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2021-08-29 11:00:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:00:52,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-08-29 11:00:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:52,726 INFO L225 Difference]: With dead ends: 54 [2021-08-29 11:00:52,726 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 11:00:52,727 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.47ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:52,728 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.53ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.46ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:52,728 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 77 Unknown, 0 Unchecked, 0.53ms Time], IncrementalHoareTripleChecker [20 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 53.46ms Time] [2021-08-29 11:00:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 11:00:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-29 11:00:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-08-29 11:00:52,733 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2021-08-29 11:00:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:52,734 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-08-29 11:00:52,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 11:00:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-08-29 11:00:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 11:00:52,735 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:52,735 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:52,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 11:00:52,735 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:52,736 INFO L82 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2021-08-29 11:00:52,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:52,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137885382] [2021-08-29 11:00:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:52,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:52,786 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 11:00:52,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:52,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137885382] [2021-08-29 11:00:52,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137885382] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:52,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:52,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 11:00:52,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509892565] [2021-08-29 11:00:52,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 11:00:52,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 11:00:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-29 11:00:52,788 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 11:00:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:52,833 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-08-29 11:00:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 11:00:52,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 23 [2021-08-29 11:00:52,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:52,834 INFO L225 Difference]: With dead ends: 52 [2021-08-29 11:00:52,834 INFO L226 Difference]: Without dead ends: 35 [2021-08-29 11:00:52,834 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.96ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-29 11:00:52,835 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.90ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:52,836 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 35.90ms Time] [2021-08-29 11:00:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-29 11:00:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-29 11:00:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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 11:00:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-08-29 11:00:52,840 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 23 [2021-08-29 11:00:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:52,853 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-08-29 11:00:52,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 11:00:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-08-29 11:00:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 11:00:52,855 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:52,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:52,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 11:00:52,855 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash 602818777, now seen corresponding path program 1 times [2021-08-29 11:00:52,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:52,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109881808] [2021-08-29 11:00:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:52,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:52,939 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 11:00:52,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:52,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109881808] [2021-08-29 11:00:52,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109881808] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:52,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:52,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-29 11:00:52,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762529485] [2021-08-29 11:00:52,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 11:00:52,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:52,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 11:00:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-29 11:00:52,943 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 11:00:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:53,026 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-08-29 11:00:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 11:00:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 23 [2021-08-29 11:00:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:53,028 INFO L225 Difference]: With dead ends: 44 [2021-08-29 11:00:53,029 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 11:00:53,029 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.27ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-29 11:00:53,031 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.75ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:53,032 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 67.75ms Time] [2021-08-29 11:00:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 11:00:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-29 11:00:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-08-29 11:00:53,042 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-08-29 11:00:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:53,043 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-08-29 11:00:53,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 11:00:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-08-29 11:00:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 11:00:53,044 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:53,044 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:53,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 11:00:53,044 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:53,045 INFO L82 PathProgramCache]: Analyzing trace with hash -218545361, now seen corresponding path program 1 times [2021-08-29 11:00:53,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:53,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381709695] [2021-08-29 11:00:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:53,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:53,090 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 11:00:53,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:53,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381709695] [2021-08-29 11:00:53,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381709695] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:53,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:53,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:00:53,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143710324] [2021-08-29 11:00:53,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:00:53,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:00:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:53,097 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 11:00:53,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:53,138 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-29 11:00:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:00:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-08-29 11:00:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:53,140 INFO L225 Difference]: With dead ends: 34 [2021-08-29 11:00:53,140 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 11:00:53,140 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.87ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:00:53,143 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.78ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:53,145 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [10 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 30.78ms Time] [2021-08-29 11:00:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 11:00:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-29 11:00:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 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 11:00:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-29 11:00:53,156 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2021-08-29 11:00:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:53,156 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-29 11:00:53,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 11:00:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-29 11:00:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 11:00:53,157 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:53,157 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:53,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-29 11:00:53,157 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash -217919750, now seen corresponding path program 1 times [2021-08-29 11:00:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:53,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128977890] [2021-08-29 11:00:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:53,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:53,257 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 11:00:53,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:53,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128977890] [2021-08-29 11:00:53,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128977890] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:53,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:53,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-29 11:00:53,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809535455] [2021-08-29 11:00:53,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 11:00:53,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:53,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 11:00:53,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-29 11:00:53,258 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 11:00:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:53,311 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-08-29 11:00:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 11:00:53,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 23 [2021-08-29 11:00:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:53,313 INFO L225 Difference]: With dead ends: 36 [2021-08-29 11:00:53,313 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 11:00:53,313 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.92ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-29 11:00:53,315 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.33ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:53,316 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [20 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 42.33ms Time] [2021-08-29 11:00:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 11:00:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 11:00:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 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 11:00:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-29 11:00:53,323 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-08-29 11:00:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:53,323 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-29 11:00:53,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 11:00:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-29 11:00:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-29 11:00:53,324 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:53,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:53,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 11:00:53,324 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash 423767145, now seen corresponding path program 1 times [2021-08-29 11:00:53,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:53,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514476195] [2021-08-29 11:00:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:53,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:53,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:53,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514476195] [2021-08-29 11:00:53,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514476195] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:00:53,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:00:53,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-29 11:00:53,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723297705] [2021-08-29 11:00:53,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 11:00:53,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 11:00:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-29 11:00:53,416 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 11:00:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:53,467 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-08-29 11:00:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 11:00:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-29 11:00:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:53,467 INFO L225 Difference]: With dead ends: 34 [2021-08-29 11:00:53,468 INFO L226 Difference]: Without dead ends: 29 [2021-08-29 11:00:53,468 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.80ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-29 11:00:53,468 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.41ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:53,468 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 46.41ms Time] [2021-08-29 11:00:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-29 11:00:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-29 11:00:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-08-29 11:00:53,470 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2021-08-29 11:00:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:53,470 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-08-29 11:00:53,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 11:00:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-08-29 11:00:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-29 11:00:53,471 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:53,471 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:53,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-29 11:00:53,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2021-08-29 11:00:53,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:53,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876154661] [2021-08-29 11:00:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:53,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:53,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:53,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876154661] [2021-08-29 11:00:53,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876154661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:53,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202442954] [2021-08-29 11:00:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:53,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:53,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:53,573 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 11:00:53,582 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 11:00:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 11:00:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:00:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:53,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:00:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:53,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202442954] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:00:53,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:00:53,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-08-29 11:00:53,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167136710] [2021-08-29 11:00:53,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-29 11:00:53,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-29 11:00:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-29 11:00:53,914 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:54,001 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-08-29 11:00:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-29 11:00:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-29 11:00:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:54,002 INFO L225 Difference]: With dead ends: 58 [2021-08-29 11:00:54,002 INFO L226 Difference]: Without dead ends: 53 [2021-08-29 11:00:54,002 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 186.72ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-29 11:00:54,003 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.23ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:54,003 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 180 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [69 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 77.23ms Time] [2021-08-29 11:00:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-29 11:00:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-29 11:00:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:54,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-08-29 11:00:54,006 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-08-29 11:00:54,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:54,006 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-08-29 11:00:54,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:00:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-08-29 11:00:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-29 11:00:54,007 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:54,007 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:54,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 11:00:54,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:54,229 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1668395554, now seen corresponding path program 2 times [2021-08-29 11:00:54,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:54,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898893700] [2021-08-29 11:00:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:54,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:54,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:54,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898893700] [2021-08-29 11:00:54,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898893700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:54,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135312213] [2021-08-29 11:00:54,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 11:00:54,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:54,569 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 11:00:54,570 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 11:00:54,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 11:00:54,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:00:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-29 11:00:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:00:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:54,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:00:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:55,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135312213] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:00:55,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:00:55,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-08-29 11:00:55,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95161807] [2021-08-29 11:00:55,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-29 11:00:55,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:55,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-29 11:00:55,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-08-29 11:00:55,489 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 11:00:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:55,632 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-08-29 11:00:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-29 11:00:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2021-08-29 11:00:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:55,633 INFO L225 Difference]: With dead ends: 106 [2021-08-29 11:00:55,633 INFO L226 Difference]: Without dead ends: 101 [2021-08-29 11:00:55,634 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 812.54ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-08-29 11:00:55,634 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.61ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:55,635 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 279 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [106 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 116.61ms Time] [2021-08-29 11:00:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-29 11:00:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-08-29 11:00:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 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 11:00:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-08-29 11:00:55,639 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2021-08-29 11:00:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:55,639 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-08-29 11:00:55,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 11:00:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-08-29 11:00:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-29 11:00:55,641 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:55,641 INFO L513 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:55,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 11:00:55,857 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,SelfDestructingSolverStorable9 [2021-08-29 11:00:55,857 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1723682778, now seen corresponding path program 3 times [2021-08-29 11:00:55,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:55,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703318588] [2021-08-29 11:00:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:55,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:00:56,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:56,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703318588] [2021-08-29 11:00:56,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703318588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:56,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883057828] [2021-08-29 11:00:56,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 11:00:56,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:56,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:56,757 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 11:00:56,828 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 11:00:56,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-29 11:00:56,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:00:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 11:00:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:00:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2021-08-29 11:00:57,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:00:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2021-08-29 11:00:57,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883057828] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:00:57,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:00:57,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 53 [2021-08-29 11:00:57,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056968497] [2021-08-29 11:00:57,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-29 11:00:57,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-29 11:00:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-29 11:00:57,182 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 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 11:00:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:57,312 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-08-29 11:00:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-29 11:00:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 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 99 [2021-08-29 11:00:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:57,316 INFO L225 Difference]: With dead ends: 113 [2021-08-29 11:00:57,316 INFO L226 Difference]: Without dead ends: 108 [2021-08-29 11:00:57,317 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 834.36ms TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-29 11:00:57,317 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.26ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:57,318 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [112 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 104.26ms Time] [2021-08-29 11:00:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-29 11:00:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-29 11:00:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 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 11:00:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-08-29 11:00:57,326 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 99 [2021-08-29 11:00:57,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:57,327 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-08-29 11:00:57,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4150943396226414) internal successors, (128), 53 states have internal predecessors, (128), 0 states have call successors, (0), 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 11:00:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-08-29 11:00:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-29 11:00:57,331 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:57,332 INFO L513 BasicCegarLoop]: trace histogram [42, 38, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:57,364 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 11:00:57,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:57,564 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash -640925019, now seen corresponding path program 4 times [2021-08-29 11:00:57,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:57,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584422064] [2021-08-29 11:00:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:57,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:00:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-29 11:00:58,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:00:58,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584422064] [2021-08-29 11:00:58,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584422064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:00:58,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979390744] [2021-08-29 11:00:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 11:00:58,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:00:58,377 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 11:00:58,426 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 11:00:58,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 11:00:58,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:00:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-29 11:00:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:00:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-29 11:00:58,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:00:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-29 11:00:59,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979390744] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:00:59,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:00:59,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 53 [2021-08-29 11:00:59,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657052087] [2021-08-29 11:00:59,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-29 11:00:59,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:00:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-29 11:00:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-29 11:00:59,026 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 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 11:00:59,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:00:59,149 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-08-29 11:00:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-29 11:00:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 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 107 [2021-08-29 11:00:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:00:59,150 INFO L225 Difference]: With dead ends: 124 [2021-08-29 11:00:59,150 INFO L226 Difference]: Without dead ends: 114 [2021-08-29 11:00:59,151 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 822.80ms TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-29 11:00:59,151 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.19ms IncrementalHoareTripleChecker+Time [2021-08-29 11:00:59,152 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 197 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [37 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 109.19ms Time] [2021-08-29 11:00:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-29 11:00:59,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-08-29 11:00:59,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 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 11:00:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-08-29 11:00:59,167 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 107 [2021-08-29 11:00:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:00:59,167 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-08-29 11:00:59,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 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 11:00:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-08-29 11:00:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-08-29 11:00:59,169 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:00:59,169 INFO L513 BasicCegarLoop]: trace histogram [45, 41, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:00:59,186 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 11:00:59,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:00:59,385 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:00:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:00:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1058630724, now seen corresponding path program 5 times [2021-08-29 11:00:59,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:00:59,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796490928] [2021-08-29 11:00:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:00:59,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:00:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:01:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:01:00,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:01:00,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796490928] [2021-08-29 11:01:00,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796490928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:01:00,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753892407] [2021-08-29 11:01:00,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 11:01:00,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:01:00,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:01:00,468 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 11:01:00,469 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 11:01:00,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-08-29 11:01:00,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:01:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-29 11:01:00,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:01:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-08-29 11:01:01,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:01:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-08-29 11:01:02,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753892407] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:01:02,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:01:02,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 25, 25] total 98 [2021-08-29 11:01:02,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42064980] [2021-08-29 11:01:02,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-08-29 11:01:02,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:01:02,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-08-29 11:01:02,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-08-29 11:01:02,825 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 98 states, 98 states have (on average 2.2653061224489797) internal successors, (222), 98 states have internal predecessors, (222), 0 states have call successors, (0), 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 11:01:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:01:03,120 INFO L93 Difference]: Finished difference Result 201 states and 243 transitions. [2021-08-29 11:01:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-29 11:01:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2653061224489797) internal successors, (222), 98 states have internal predecessors, (222), 0 states have call successors, (0), 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 113 [2021-08-29 11:01:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:01:03,122 INFO L225 Difference]: With dead ends: 201 [2021-08-29 11:01:03,122 INFO L226 Difference]: Without dead ends: 198 [2021-08-29 11:01:03,124 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2835.78ms TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-08-29 11:01:03,124 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 155 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.45ms IncrementalHoareTripleChecker+Time [2021-08-29 11:01:03,124 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 0 Invalid, 529 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [264 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 221.45ms Time] [2021-08-29 11:01:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-29 11:01:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-08-29 11:01:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 0 states have call successors, (0), 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 11:01:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2021-08-29 11:01:03,130 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 113 [2021-08-29 11:01:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:01:03,130 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2021-08-29 11:01:03,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2653061224489797) internal successors, (222), 98 states have internal predecessors, (222), 0 states have call successors, (0), 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 11:01:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2021-08-29 11:01:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-08-29 11:01:03,132 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:01:03,132 INFO L513 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:01:03,151 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 11:01:03,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-29 11:01:03,349 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:01:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:01:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 6 times [2021-08-29 11:01:03,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:01:03,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828892043] [2021-08-29 11:01:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:01:03,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:01:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:01:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:01:05,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:01:05,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828892043] [2021-08-29 11:01:05,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828892043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:01:05,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482788622] [2021-08-29 11:01:05,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 11:01:05,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:01:05,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:01:05,533 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 11:01:05,534 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 11:01:05,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-08-29 11:01:05,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:01:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-29 11:01:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:01:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-08-29 11:01:06,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:01:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-08-29 11:01:06,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482788622] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:01:06,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:01:06,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 49, 49] total 102 [2021-08-29 11:01:06,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688692910] [2021-08-29 11:01:06,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-08-29 11:01:06,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:01:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-08-29 11:01:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-08-29 11:01:06,393 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 102 states, 102 states have (on average 2.2254901960784315) internal successors, (227), 102 states have internal predecessors, (227), 0 states have call successors, (0), 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 11:01:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:01:06,714 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2021-08-29 11:01:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-29 11:01:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.2254901960784315) internal successors, (227), 102 states have internal predecessors, (227), 0 states have call successors, (0), 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 197 [2021-08-29 11:01:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:01:06,715 INFO L225 Difference]: With dead ends: 209 [2021-08-29 11:01:06,715 INFO L226 Difference]: Without dead ends: 206 [2021-08-29 11:01:06,717 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2073.99ms TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-08-29 11:01:06,718 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.00ms IncrementalHoareTripleChecker+Time [2021-08-29 11:01:06,718 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 0 Invalid, 545 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [263 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 187.00ms Time] [2021-08-29 11:01:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-29 11:01:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-08-29 11:01:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 0 states have call successors, (0), 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 11:01:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2021-08-29 11:01:06,731 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 197 [2021-08-29 11:01:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:01:06,732 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2021-08-29 11:01:06,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.2254901960784315) internal successors, (227), 102 states have internal predecessors, (227), 0 states have call successors, (0), 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 11:01:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2021-08-29 11:01:06,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-08-29 11:01:06,733 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:01:06,733 INFO L513 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:01:06,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-29 11:01:06,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:01:06,946 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:01:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:01:06,947 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 7 times [2021-08-29 11:01:06,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:01:06,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953081553] [2021-08-29 11:01:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:01:06,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:01:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:01:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-08-29 11:01:08,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:01:08,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953081553] [2021-08-29 11:01:08,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953081553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:01:08,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594515639] [2021-08-29 11:01:08,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 11:01:08,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:01:08,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:01:08,242 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 11:01:08,243 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 11:01:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:01:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-29 11:01:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:01:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-08-29 11:01:09,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:01:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-08-29 11:01:10,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594515639] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:01:10,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:01:10,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 55 [2021-08-29 11:01:10,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671884259] [2021-08-29 11:01:10,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-29 11:01:10,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:01:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-29 11:01:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2021-08-29 11:01:10,170 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 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 11:01:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:01:12,463 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2021-08-29 11:01:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-29 11:01:12,466 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 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 205 [2021-08-29 11:01:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:01:12,466 INFO L225 Difference]: With dead ends: 212 [2021-08-29 11:01:12,466 INFO L226 Difference]: Without dead ends: 209 [2021-08-29 11:01:12,467 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 404 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1239.92ms TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2021-08-29 11:01:12,467 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 3797 mSDsCounter, 0 mSdLazyCounter, 6683 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1781.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2207.37ms IncrementalHoareTripleChecker+Time [2021-08-29 11:01:12,468 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 6683 Unknown, 0 Unchecked, 15.12ms Time], IncrementalHoareTripleChecker [0 Valid, 6683 Invalid, 0 Unknown, 0 Unchecked, 2207.37ms Time] [2021-08-29 11:01:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-29 11:01:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2021-08-29 11:01:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 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 11:01:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2021-08-29 11:01:12,486 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2021-08-29 11:01:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:01:12,489 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2021-08-29 11:01:12,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.290909090909091) internal successors, (126), 55 states have internal predecessors, (126), 0 states have call successors, (0), 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 11:01:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2021-08-29 11:01:12,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-08-29 11:01:12,498 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:01:12,498 INFO L513 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:01:12,518 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 11:01:12,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:01:12,699 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:01:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:01:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 8 times [2021-08-29 11:01:12,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:01:12,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210933570] [2021-08-29 11:01:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:01:12,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:01:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:01:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-08-29 11:01:13,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:01:13,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210933570] [2021-08-29 11:01:13,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210933570] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:01:13,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:01:13,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-08-29 11:01:13,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510839564] [2021-08-29 11:01:13,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-29 11:01:13,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:01:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-29 11:01:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-29 11:01:13,597 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 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 11:01:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:01:13,754 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2021-08-29 11:01:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-29 11:01:13,755 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 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 207 [2021-08-29 11:01:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:01:13,755 INFO L225 Difference]: With dead ends: 208 [2021-08-29 11:01:13,755 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 11:01:13,756 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 766.64ms TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-29 11:01:13,756 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.38ms IncrementalHoareTripleChecker+Time [2021-08-29 11:01:13,756 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 535 Unknown, 0 Unchecked, 0.36ms Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 117.38ms Time] [2021-08-29 11:01:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 11:01:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 11:01:13,757 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 11:01:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 11:01:13,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2021-08-29 11:01:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:01:13,757 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 11:01:13,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 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 11:01:13,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 11:01:13,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 11:01:13,759 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 11:01:13,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-29 11:01:13,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:01:13,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:13,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:01:14,998 INFO L854 garLoopResultBuilder]: At program point L159(lines 43 160) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 5) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:14,998 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 208) no Hoare annotation was computed. [2021-08-29 11:01:14,998 INFO L854 garLoopResultBuilder]: At program point L135(lines 55 136) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 7) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:14,998 INFO L858 garLoopResultBuilder]: For program point L94(lines 94 103) no Hoare annotation was computed. [2021-08-29 11:01:14,998 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:01:14,998 INFO L858 garLoopResultBuilder]: For program point L61(lines 61 124) no Hoare annotation was computed. [2021-08-29 11:01:14,998 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:01:14,998 INFO L854 garLoopResultBuilder]: At program point L111(lines 67 112) the Hoare annotation is: (or (and (<= 51 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 51) (<= 51 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 51)) (and (<= 57 ULTIMATE.start_main_~main__y~0) (<= 57 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 57) (<= ULTIMATE.start_main_~main__y~0 57)) (and (<= 94 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 94) (<= ULTIMATE.start_main_~main__x~0 94) (<= 94 ULTIMATE.start_main_~main__y~0)) (and (<= 99 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 99) (<= 99 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 100)) (and (<= ULTIMATE.start_main_~main__y~0 83) (<= ULTIMATE.start_main_~main__x~0 83) (<= 83 ULTIMATE.start_main_~main__x~0) (<= 83 ULTIMATE.start_main_~main__y~0)) (and (<= 89 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 89) (<= 89 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 89)) (and (<= 53 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 53) (<= 53 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 53)) (and (<= 60 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 60) (<= 60 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 60)) (and (<= ULTIMATE.start_main_~main__y~0 56) (<= 56 ULTIMATE.start_main_~main__y~0) (<= 56 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 56)) (and (<= ULTIMATE.start_main_~main__x~0 88) (<= ULTIMATE.start_main_~main__y~0 88) (<= 88 ULTIMATE.start_main_~main__x~0) (<= 88 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 66) (<= 66 ULTIMATE.start_main_~main__x~0) (<= 66 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 66)) (and (<= 85 ULTIMATE.start_main_~main__x~0) (<= 85 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 85) (<= ULTIMATE.start_main_~main__y~0 85)) (and (<= 64 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 64) (<= 64 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 64)) (and (<= ULTIMATE.start_main_~main__y~0 59) (<= ULTIMATE.start_main_~main__x~0 59) (<= 59 ULTIMATE.start_main_~main__x~0) (<= 59 ULTIMATE.start_main_~main__y~0)) (and (<= 81 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 81) (<= 81 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 81)) (and (<= 77 ULTIMATE.start_main_~main__x~0) (<= 77 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 77) (<= ULTIMATE.start_main_~main__y~0 77)) (and (<= 93 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 93) (<= ULTIMATE.start_main_~main__y~0 93) (<= 93 ULTIMATE.start_main_~main__y~0)) (and (<= 70 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 70) (<= ULTIMATE.start_main_~main__y~0 70) (<= 70 ULTIMATE.start_main_~main__x~0)) (and (<= 54 ULTIMATE.start_main_~main__x~0) (<= 54 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 54) (<= ULTIMATE.start_main_~main__x~0 54)) (and (<= 98 ULTIMATE.start_main_~main__y~0) (<= 98 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 98) (< ULTIMATE.start_main_~main__x~0 99)) (and (<= 95 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 95) (<= ULTIMATE.start_main_~main__x~0 95) (<= 95 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 69) (<= 69 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 69) (<= 69 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__x~0 72) (<= ULTIMATE.start_main_~main__y~0 72) (<= 72 ULTIMATE.start_main_~main__y~0) (<= 72 ULTIMATE.start_main_~main__x~0)) (and (<= 100 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 100) (< 99 ULTIMATE.start_main_~main__y~0)) (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 50) (<= ULTIMATE.start_main_~main__y~0 50)) (and (<= 91 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 91) (<= 91 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 91)) (and (<= ULTIMATE.start_main_~main__y~0 52) (<= 52 ULTIMATE.start_main_~main__y~0) (<= 52 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 52)) (and (<= 96 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 96) (<= 96 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 96)) (and (<= 82 ULTIMATE.start_main_~main__y~0) (<= 82 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 82) (<= ULTIMATE.start_main_~main__x~0 82)) (and (<= 97 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 97) (<= 97 ULTIMATE.start_main_~main__x~0) (< ULTIMATE.start_main_~main__x~0 98)) (and (<= ULTIMATE.start_main_~main__x~0 76) (<= 76 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 76) (<= 76 ULTIMATE.start_main_~main__y~0)) (and (<= 65 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 65) (<= ULTIMATE.start_main_~main__y~0 65) (<= 65 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 67) (<= 67 ULTIMATE.start_main_~main__x~0) (<= 67 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 67)) (and (<= 61 ULTIMATE.start_main_~main__x~0) (<= 61 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 61) (<= ULTIMATE.start_main_~main__y~0 61)) (and (<= ULTIMATE.start_main_~main__x~0 75) (<= ULTIMATE.start_main_~main__y~0 75) (<= 75 ULTIMATE.start_main_~main__y~0) (<= 75 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__x~0 58) (<= 58 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 58) (<= 58 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 78) (<= 78 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 78) (<= 78 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 68) (<= ULTIMATE.start_main_~main__x~0 68) (<= 68 ULTIMATE.start_main_~main__x~0) (<= 68 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 86) (<= ULTIMATE.start_main_~main__y~0 86) (<= 86 ULTIMATE.start_main_~main__x~0) (<= 86 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 63) (<= 63 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 63) (<= 63 ULTIMATE.start_main_~main__x~0)) (and (<= 79 ULTIMATE.start_main_~main__y~0) (<= 79 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 79) (<= ULTIMATE.start_main_~main__y~0 79)) (and (<= 90 ULTIMATE.start_main_~main__x~0) (<= 90 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 90) (<= ULTIMATE.start_main_~main__x~0 90)) (and (<= ULTIMATE.start_main_~main__x~0 87) (<= ULTIMATE.start_main_~main__y~0 87) (<= 87 ULTIMATE.start_main_~main__y~0) (<= 87 ULTIMATE.start_main_~main__x~0)) (and (<= 71 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 71) (<= 71 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 71)) (and (<= ULTIMATE.start_main_~main__x~0 62) (<= ULTIMATE.start_main_~main__y~0 62) (<= 62 ULTIMATE.start_main_~main__x~0) (<= 62 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 92) (<= ULTIMATE.start_main_~main__y~0 92) (<= 92 ULTIMATE.start_main_~main__x~0) (<= 92 ULTIMATE.start_main_~main__y~0)) (and (<= 73 ULTIMATE.start_main_~main__y~0) (<= 73 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 73) (<= ULTIMATE.start_main_~main__y~0 73)) (and (<= ULTIMATE.start_main_~main__y~0 74) (<= 74 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 74) (<= 74 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 80) (<= 80 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 80) (<= 80 ULTIMATE.start_main_~main__y~0)) (and (<= 84 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 84) (<= 84 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 84)) (and (<= ULTIMATE.start_main_~main__y~0 55) (<= ULTIMATE.start_main_~main__x~0 55) (<= 55 ULTIMATE.start_main_~main__y~0) (<= 55 ULTIMATE.start_main_~main__x~0))) [2021-08-29 11:01:14,998 INFO L858 garLoopResultBuilder]: For program point L37(lines 37 172) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L854 garLoopResultBuilder]: At program point L195(lines 25 196) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 2) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point L96(line 96) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point L55(lines 55 136) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L861 garLoopResultBuilder]: At program point L212(lines 13 214) the Hoare annotation is: true [2021-08-29 11:01:14,999 INFO L854 garLoopResultBuilder]: At program point L171(lines 37 172) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 4) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point L31(lines 31 184) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L854 garLoopResultBuilder]: At program point L147(lines 49 148) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 6) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L854 garLoopResultBuilder]: At program point L123(lines 61 124) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 8) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 96) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point L49(lines 49 148) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point L74(lines 74 85) no Hoare annotation was computed. [2021-08-29 11:01:14,999 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:01:15,000 INFO L858 garLoopResultBuilder]: For program point L25(lines 25 196) no Hoare annotation was computed. [2021-08-29 11:01:15,000 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 213) no Hoare annotation was computed. [2021-08-29 11:01:15,000 INFO L854 garLoopResultBuilder]: At program point L207(lines 19 208) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 1) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:15,000 INFO L858 garLoopResultBuilder]: For program point L67(lines 67 112) no Hoare annotation was computed. [2021-08-29 11:01:15,000 INFO L854 garLoopResultBuilder]: At program point L183(lines 31 184) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 3) (<= ULTIMATE.start_main_~main__y~0 50)) [2021-08-29 11:01:15,000 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 160) no Hoare annotation was computed. [2021-08-29 11:01:15,003 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:01:15,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:01:15 BoogieIcfgContainer [2021-08-29 11:01:15,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:01:15,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:01:15,056 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:01:15,056 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:01:15,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:00:52" (3/4) ... [2021-08-29 11:01:15,059 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:01:15,065 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 11:01:15,066 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:01:15,066 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:01:15,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:01:15,177 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:01:15,178 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:01:15,179 INFO L158 Benchmark]: Toolchain (without parser) took 23567.38ms. Allocated memory was 54.5MB in the beginning and 195.0MB in the end (delta: 140.5MB). Free memory was 32.8MB in the beginning and 84.2MB in the end (delta: -51.4MB). Peak memory consumption was 90.1MB. Max. memory is 16.1GB. [2021-08-29 11:01:15,179 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 36.4MB in the beginning and 36.4MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:01:15,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.20ms. Allocated memory is still 54.5MB. Free memory was 32.6MB in the beginning and 37.4MB in the end (delta: -4.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2021-08-29 11:01:15,180 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.24ms. Allocated memory is still 54.5MB. Free memory was 37.4MB in the beginning and 35.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:01:15,180 INFO L158 Benchmark]: Boogie Preprocessor took 26.06ms. Allocated memory is still 54.5MB. Free memory was 35.8MB in the beginning and 34.8MB in the end (delta: 998.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:01:15,180 INFO L158 Benchmark]: RCFGBuilder took 202.33ms. Allocated memory is still 54.5MB. Free memory was 34.8MB in the beginning and 25.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:01:15,180 INFO L158 Benchmark]: TraceAbstraction took 22946.43ms. Allocated memory was 54.5MB in the beginning and 195.0MB in the end (delta: 140.5MB). Free memory was 24.5MB in the beginning and 88.4MB in the end (delta: -63.9MB). Peak memory consumption was 103.8MB. Max. memory is 16.1GB. [2021-08-29 11:01:15,184 INFO L158 Benchmark]: Witness Printer took 121.63ms. Allocated memory is still 195.0MB. Free memory was 88.4MB in the beginning and 84.2MB in the end (delta: 4.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:01:15,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 54.5MB. Free memory was 36.4MB in the beginning and 36.4MB in the end (delta: 52.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.20ms. Allocated memory is still 54.5MB. Free memory was 32.6MB in the beginning and 37.4MB in the end (delta: -4.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.24ms. Allocated memory is still 54.5MB. Free memory was 37.4MB in the beginning and 35.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.06ms. Allocated memory is still 54.5MB. Free memory was 35.8MB in the beginning and 34.8MB in the end (delta: 998.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 202.33ms. Allocated memory is still 54.5MB. Free memory was 34.8MB in the beginning and 25.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 22946.43ms. Allocated memory was 54.5MB in the beginning and 195.0MB in the end (delta: 140.5MB). Free memory was 24.5MB in the beginning and 88.4MB in the end (delta: -63.9MB). Peak memory consumption was 103.8MB. Max. memory is 16.1GB. * Witness Printer took 121.63ms. Allocated memory is still 195.0MB. Free memory was 88.4MB in the beginning and 84.2MB in the end (delta: 4.2MB). 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: 96]: 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, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 22848.87ms, OverallIterations: 16, TraceHistogramMax: 92, EmptinessCheckTime: 21.47ms, AutomataDifference: 4136.17ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 1237.83ms, InitialAbstractionConstructionTime: 6.46ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 674 SdHoareTripleChecker+Valid, 3535.87ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 674 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2812.97ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3925 mSDsCounter, 935 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8984 IncrementalHoareTripleChecker+Invalid, 9919 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 935 mSolverCounterUnsat, 0 mSDtfsCounter, 8984 mSolverCounterSat, 30.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2034 GetRequests, 1519 SyntacticMatches, 9 SemanticMatches, 506 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 9717.92ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=15, InterpolantAutomatonStates: 533, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 115.64ms AutomataMinimizationTime, 16 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 111 NumberOfFragments, 739 HoareAnnotationTreeSize, 10 FomulaSimplifications, 54 FormulaSimplificationTreeSizeReduction, 139.35ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 848 FormulaSimplificationTreeSizeReductionInter, 1091.46ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 100.67ms SsaConstructionTime, 752.24ms SatisfiabilityAnalysisTime, 14422.40ms InterpolantComputationTime, 1991 NumberOfCodeBlocks, 1919 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 2760 ConstructedInterpolants, 0 QuantifiedInterpolants, 9057 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1927 ConjunctsInSsa, 268 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 31437/72314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 3) && main__y <= 50 - InvariantResult [Line: 67]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((51 <= main__y && main__y <= 51) && 51 <= main__x) && main__x <= 51) || (((57 <= main__y && 57 <= main__x) && main__x <= 57) && main__y <= 57)) || (((94 <= main__x && main__y <= 94) && main__x <= 94) && 94 <= main__y)) || (((99 <= main__y && main__y <= 99) && 99 <= main__x) && main__x < 100)) || (((main__y <= 83 && main__x <= 83) && 83 <= main__x) && 83 <= main__y)) || (((89 <= main__x && main__y <= 89) && 89 <= main__y) && main__x <= 89)) || (((53 <= main__x && main__y <= 53) && 53 <= main__y) && main__x <= 53)) || (((60 <= main__x && main__y <= 60) && 60 <= main__y) && main__x <= 60)) || (((main__y <= 56 && 56 <= main__y) && 56 <= main__x) && main__x <= 56)) || (((main__x <= 88 && main__y <= 88) && 88 <= main__x) && 88 <= main__y)) || (((main__x <= 66 && 66 <= main__x) && 66 <= main__y) && main__y <= 66)) || (((85 <= main__x && 85 <= main__y) && main__x <= 85) && main__y <= 85)) || (((64 <= main__x && main__x <= 64) && 64 <= main__y) && main__y <= 64)) || (((main__y <= 59 && main__x <= 59) && 59 <= main__x) && 59 <= main__y)) || (((81 <= main__x && main__y <= 81) && 81 <= main__y) && main__x <= 81)) || (((77 <= main__x && 77 <= main__y) && main__x <= 77) && main__y <= 77)) || (((93 <= main__x && main__x <= 93) && main__y <= 93) && 93 <= main__y)) || (((70 <= main__y && main__x <= 70) && main__y <= 70) && 70 <= main__x)) || (((54 <= main__x && 54 <= main__y) && main__y <= 54) && main__x <= 54)) || (((98 <= main__y && 98 <= main__x) && main__y <= 98) && main__x < 99)) || (((95 <= main__x && main__y <= 95) && main__x <= 95) && 95 <= main__y)) || (((main__x <= 69 && 69 <= main__y) && main__y <= 69) && 69 <= main__x)) || (((main__x <= 72 && main__y <= 72) && 72 <= main__y) && 72 <= main__x)) || ((100 <= main__x && main__y <= 100) && 99 < main__y)) || ((50 <= main__y && main__x <= 50) && main__y <= 50)) || (((91 <= main__y && main__x <= 91) && 91 <= main__x) && main__y <= 91)) || (((main__y <= 52 && 52 <= main__y) && 52 <= main__x) && main__x <= 52)) || (((96 <= main__y && main__x <= 96) && 96 <= main__x) && main__y <= 96)) || (((82 <= main__y && 82 <= main__x) && main__y <= 82) && main__x <= 82)) || (((97 <= main__y && main__y <= 97) && 97 <= main__x) && main__x < 98)) || (((main__x <= 76 && 76 <= main__x) && main__y <= 76) && 76 <= main__y)) || (((65 <= main__x && main__x <= 65) && main__y <= 65) && 65 <= main__y)) || (((main__x <= 67 && 67 <= main__x) && 67 <= main__y) && main__y <= 67)) || (((61 <= main__x && 61 <= main__y) && main__x <= 61) && main__y <= 61)) || (((main__x <= 75 && main__y <= 75) && 75 <= main__y) && 75 <= main__x)) || (((main__x <= 58 && 58 <= main__x) && main__y <= 58) && 58 <= main__y)) || (((main__y <= 78 && 78 <= main__x) && main__x <= 78) && 78 <= main__y)) || (((main__y <= 68 && main__x <= 68) && 68 <= main__x) && 68 <= main__y)) || (((main__x <= 86 && main__y <= 86) && 86 <= main__x) && 86 <= main__y)) || (((main__x <= 63 && 63 <= main__y) && main__y <= 63) && 63 <= main__x)) || (((79 <= main__y && 79 <= main__x) && main__x <= 79) && main__y <= 79)) || (((90 <= main__x && 90 <= main__y) && main__y <= 90) && main__x <= 90)) || (((main__x <= 87 && main__y <= 87) && 87 <= main__y) && 87 <= main__x)) || (((71 <= main__x && main__y <= 71) && 71 <= main__y) && main__x <= 71)) || (((main__x <= 62 && main__y <= 62) && 62 <= main__x) && 62 <= main__y)) || (((main__x <= 92 && main__y <= 92) && 92 <= main__x) && 92 <= main__y)) || (((73 <= main__y && 73 <= main__x) && main__x <= 73) && main__y <= 73)) || (((main__y <= 74 && 74 <= main__x) && main__x <= 74) && 74 <= main__y)) || (((main__y <= 80 && 80 <= main__x) && main__x <= 80) && 80 <= main__y)) || (((84 <= main__y && main__x <= 84) && 84 <= main__x) && main__y <= 84)) || (((main__y <= 55 && main__x <= 55) && 55 <= main__y) && 55 <= main__x) - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 7) && main__y <= 50 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (main__x <= 1 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (main__x <= 2 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 61]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 8) && main__y <= 50 - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 5) && main__y <= 50 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (main__x <= 6 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 4) && main__y <= 50 RESULT: Ultimate proved your program to be correct! [2021-08-29 11:01:15,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...