./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.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 e71fbc3aec2c9c2ff52e88118da6df1a52f5854c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 09:00:41,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 09:00:41,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 09:00:41,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 09:00:41,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 09:00:41,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 09:00:41,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 09:00:41,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 09:00:41,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 09:00:41,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 09:00:41,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 09:00:41,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 09:00:41,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 09:00:41,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 09:00:41,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 09:00:41,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 09:00:41,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 09:00:41,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 09:00:41,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 09:00:41,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 09:00:41,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 09:00:41,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 09:00:41,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 09:00:41,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 09:00:41,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 09:00:41,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 09:00:41,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 09:00:41,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 09:00:41,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 09:00:41,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 09:00:41,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 09:00:41,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 09:00:41,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 09:00:41,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 09:00:41,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 09:00:41,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 09:00:41,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 09:00:41,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 09:00:41,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 09:00:41,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 09:00:41,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 09:00:41,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 09:00:41,830 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 09:00:41,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 09:00:41,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 09:00:41,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 09:00:41,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 09:00:41,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 09:00:41,833 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 09:00:41,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 09:00:41,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 09:00:41,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 09:00:41,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 09:00:41,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 09:00:41,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 09:00:41,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 09:00:41,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 09:00:41,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 09:00:41,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 09:00:41,836 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 09:00:41,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 09:00:41,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 09:00:41,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 09:00:41,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 09:00:41,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:00:41,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 09:00:41,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 09:00:41,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 09:00:41,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 09:00:41,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 09:00:41,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 09:00:41,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 09:00:41,838 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e71fbc3aec2c9c2ff52e88118da6df1a52f5854c [2021-08-26 09:00:42,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 09:00:42,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 09:00:42,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 09:00:42,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 09:00:42,122 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 09:00:42,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2021-08-26 09:00:42,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c756bb2/e095cbc087b1438e8adf710f9b264fb8/FLAG8dd64d006 [2021-08-26 09:00:42,594 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 09:00:42,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2021-08-26 09:00:42,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c756bb2/e095cbc087b1438e8adf710f9b264fb8/FLAG8dd64d006 [2021-08-26 09:00:42,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92c756bb2/e095cbc087b1438e8adf710f9b264fb8 [2021-08-26 09:00:42,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 09:00:42,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 09:00:42,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 09:00:42,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 09:00:42,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 09:00:42,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8601cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42, skipping insertion in model container [2021-08-26 09:00:42,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 09:00:42,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 09:00:42,713 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/recursive-simple/id_i20_o20-1.c[454,467] [2021-08-26 09:00:42,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:00:42,720 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 09:00:42,729 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/recursive-simple/id_i20_o20-1.c[454,467] [2021-08-26 09:00:42,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:00:42,738 INFO L208 MainTranslator]: Completed translation [2021-08-26 09:00:42,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42 WrapperNode [2021-08-26 09:00:42,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 09:00:42,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 09:00:42,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 09:00:42,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 09:00:42,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 09:00:42,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 09:00:42,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 09:00:42,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 09:00:42,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 09:00:42,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 09:00:42,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 09:00:42,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 09:00:42,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (1/1) ... [2021-08-26 09:00:42,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:00:42,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:42,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 09:00:42,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 09:00:42,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 09:00:42,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 09:00:42,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 09:00:42,905 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-08-26 09:00:42,905 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-08-26 09:00:42,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 09:00:43,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 09:00:43,110 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-26 09:00:43,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:43 BoogieIcfgContainer [2021-08-26 09:00:43,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 09:00:43,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 09:00:43,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 09:00:43,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 09:00:43,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:00:42" (1/3) ... [2021-08-26 09:00:43,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c5d74e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:00:43, skipping insertion in model container [2021-08-26 09:00:43,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:42" (2/3) ... [2021-08-26 09:00:43,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c5d74e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:00:43, skipping insertion in model container [2021-08-26 09:00:43,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:43" (3/3) ... [2021-08-26 09:00:43,118 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2021-08-26 09:00:43,122 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 09:00:43,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 09:00:43,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 09:00:43,165 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 09:00:43,166 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 09:00:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-26 09:00:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 09:00:43,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:43,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:43,183 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-08-26 09:00:43,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:43,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808959565] [2021-08-26 09:00:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:43,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:00:43,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:43,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808959565] [2021-08-26 09:00:43,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808959565] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:43,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:43,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 09:00:43,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881090193] [2021-08-26 09:00:43,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:00:43,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:00:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:43,496 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:00:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:43,565 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-26 09:00:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:43,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-26 09:00:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:43,572 INFO L225 Difference]: With dead ends: 25 [2021-08-26 09:00:43,573 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 09:00:43,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 09:00:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 09:00:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-26 09:00:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-26 09:00:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-26 09:00:43,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-08-26 09:00:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:43,602 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-26 09:00:43,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:00:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-26 09:00:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 09:00:43,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:43,604 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:43,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 09:00:43,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:43,607 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-08-26 09:00:43,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:43,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351386383] [2021-08-26 09:00:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:43,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:43,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:43,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351386383] [2021-08-26 09:00:43,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351386383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:43,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938008039] [2021-08-26 09:00:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:43,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:43,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:43,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:43,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 09:00:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 09:00:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:44,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938008039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:44,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:44,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-26 09:00:44,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148125357] [2021-08-26 09:00:44,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:00:44,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:44,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:00:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:00:44,034 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 09:00:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:44,102 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-26 09:00:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 09:00:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-08-26 09:00:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:44,104 INFO L225 Difference]: With dead ends: 22 [2021-08-26 09:00:44,104 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 09:00:44,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-26 09:00:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 09:00:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-26 09:00:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 09:00:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-26 09:00:44,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-26 09:00:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:44,114 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-26 09:00:44,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 09:00:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-26 09:00:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 09:00:44,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:44,118 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:44,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:44,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:44,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-08-26 09:00:44,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:44,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116524978] [2021-08-26 09:00:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:44,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 09:00:44,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:44,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116524978] [2021-08-26 09:00:44,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116524978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:44,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571213429] [2021-08-26 09:00:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:00:44,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:44,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:44,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:44,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 09:00:44,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 09:00:44,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:44,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 09:00:44,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 09:00:44,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571213429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:44,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:44,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-26 09:00:44,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274117258] [2021-08-26 09:00:44,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 09:00:44,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 09:00:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-26 09:00:44,750 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 09:00:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:44,825 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-26 09:00:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 09:00:44,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-08-26 09:00:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:44,827 INFO L225 Difference]: With dead ends: 25 [2021-08-26 09:00:44,827 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 09:00:44,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-26 09:00:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 09:00:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-26 09:00:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-26 09:00:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-26 09:00:44,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-08-26 09:00:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:44,832 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-26 09:00:44,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 09:00:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-26 09:00:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 09:00:44,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:44,834 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:44,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:45,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 09:00:45,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:45,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-08-26 09:00:45,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:45,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324960368] [2021-08-26 09:00:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:45,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-26 09:00:45,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:45,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324960368] [2021-08-26 09:00:45,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324960368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:45,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494198175] [2021-08-26 09:00:45,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 09:00:45,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:45,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:45,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:45,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 09:00:45,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 09:00:45,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:45,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 09:00:45,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-26 09:00:45,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494198175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:45,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:45,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-26 09:00:45,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226299438] [2021-08-26 09:00:45,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 09:00:45,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 09:00:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-26 09:00:45,436 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-26 09:00:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:45,505 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-08-26 09:00:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 09:00:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2021-08-26 09:00:45,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:45,508 INFO L225 Difference]: With dead ends: 28 [2021-08-26 09:00:45,508 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 09:00:45,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:00:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 09:00:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 09:00:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-26 09:00:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-26 09:00:45,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-08-26 09:00:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:45,519 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-26 09:00:45,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-26 09:00:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-26 09:00:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 09:00:45,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:45,521 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:45,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:45,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:45,729 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-08-26 09:00:45,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:45,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363919305] [2021-08-26 09:00:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:45,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 09:00:45,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:45,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363919305] [2021-08-26 09:00:45,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363919305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:45,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339631870] [2021-08-26 09:00:45,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 09:00:45,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:45,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:45,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 09:00:45,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 09:00:45,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 09:00:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 09:00:46,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339631870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:46,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:46,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-26 09:00:46,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518166504] [2021-08-26 09:00:46,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 09:00:46,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 09:00:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-26 09:00:46,129 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-26 09:00:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:46,190 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-26 09:00:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 09:00:46,191 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-08-26 09:00:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:46,192 INFO L225 Difference]: With dead ends: 31 [2021-08-26 09:00:46,192 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 09:00:46,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-26 09:00:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 09:00:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-26 09:00:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-26 09:00:46,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-26 09:00:46,200 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-08-26 09:00:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:46,200 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-26 09:00:46,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-26 09:00:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-26 09:00:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 09:00:46,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:46,201 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:46,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:46,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:46,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-08-26 09:00:46,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:46,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782496796] [2021-08-26 09:00:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:46,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-26 09:00:46,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:46,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782496796] [2021-08-26 09:00:46,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782496796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:46,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740201376] [2021-08-26 09:00:46,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 09:00:46,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:46,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:46,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 09:00:46,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 09:00:46,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 09:00:46,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-26 09:00:46,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740201376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:46,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:46,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-26 09:00:46,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943916215] [2021-08-26 09:00:46,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 09:00:46,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:46,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 09:00:46,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-26 09:00:46,858 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-08-26 09:00:46,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:46,921 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-08-26 09:00:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 09:00:46,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-08-26 09:00:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:46,923 INFO L225 Difference]: With dead ends: 34 [2021-08-26 09:00:46,923 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 09:00:46,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-26 09:00:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 09:00:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-26 09:00:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-08-26 09:00:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-26 09:00:46,927 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-08-26 09:00:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:46,927 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-26 09:00:46,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-08-26 09:00:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-26 09:00:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 09:00:46,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:46,928 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:46,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:47,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:47,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-08-26 09:00:47,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:47,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993823028] [2021-08-26 09:00:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:47,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-26 09:00:47,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:47,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993823028] [2021-08-26 09:00:47,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993823028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:47,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802458798] [2021-08-26 09:00:47,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 09:00:47,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:47,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:47,307 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:47,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 09:00:47,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 09:00:47,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 09:00:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-26 09:00:47,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802458798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:47,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:47,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-26 09:00:47,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635084639] [2021-08-26 09:00:47,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 09:00:47,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 09:00:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-26 09:00:47,587 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-08-26 09:00:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:47,665 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-26 09:00:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 09:00:47,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) Word has length 46 [2021-08-26 09:00:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:47,667 INFO L225 Difference]: With dead ends: 37 [2021-08-26 09:00:47,667 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 09:00:47,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-26 09:00:47,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 09:00:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-26 09:00:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-08-26 09:00:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-26 09:00:47,670 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-08-26 09:00:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:47,671 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-26 09:00:47,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 8 states have return successors, (13), 7 states have call predecessors, (13), 3 states have call successors, (13) [2021-08-26 09:00:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-26 09:00:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 09:00:47,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:47,672 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:47,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:47,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:47,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-08-26 09:00:47,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:47,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501586971] [2021-08-26 09:00:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:47,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:47,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-26 09:00:48,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:48,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501586971] [2021-08-26 09:00:48,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501586971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:48,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881669374] [2021-08-26 09:00:48,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 09:00:48,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:48,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:48,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 09:00:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 09:00:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-26 09:00:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881669374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:48,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:48,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-26 09:00:48,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5760228] [2021-08-26 09:00:48,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 09:00:48,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 09:00:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:00:48,360 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-08-26 09:00:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:48,457 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-26 09:00:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 09:00:48,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-08-26 09:00:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:48,459 INFO L225 Difference]: With dead ends: 40 [2021-08-26 09:00:48,459 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 09:00:48,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-08-26 09:00:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 09:00:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-26 09:00:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-26 09:00:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-26 09:00:48,463 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-08-26 09:00:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:48,464 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-26 09:00:48,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-08-26 09:00:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-26 09:00:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-26 09:00:48,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:48,465 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:48,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-26 09:00:48,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:48,676 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-08-26 09:00:48,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:48,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525747187] [2021-08-26 09:00:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:48,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 09:00:48,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:48,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525747187] [2021-08-26 09:00:48,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525747187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:48,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211244104] [2021-08-26 09:00:48,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:00:48,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:48,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:48,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:48,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 09:00:48,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 09:00:48,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:48,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 09:00:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 09:00:49,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211244104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:49,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:49,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-26 09:00:49,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730520388] [2021-08-26 09:00:49,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 09:00:49,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 09:00:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-26 09:00:49,224 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-08-26 09:00:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:49,322 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-26 09:00:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 09:00:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-08-26 09:00:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:49,324 INFO L225 Difference]: With dead ends: 43 [2021-08-26 09:00:49,324 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 09:00:49,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-08-26 09:00:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 09:00:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-26 09:00:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-08-26 09:00:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-26 09:00:49,329 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-08-26 09:00:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:49,329 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-26 09:00:49,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-08-26 09:00:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-26 09:00:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-26 09:00:49,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:49,331 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:49,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:49,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 09:00:49,537 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-08-26 09:00:49,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:49,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039300129] [2021-08-26 09:00:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:49,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-26 09:00:49,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:49,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039300129] [2021-08-26 09:00:49,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039300129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:49,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925099816] [2021-08-26 09:00:49,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 09:00:49,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:49,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:49,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:49,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 09:00:49,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-26 09:00:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:49,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 09:00:49,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-26 09:00:50,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925099816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:50,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:50,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-26 09:00:50,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429881274] [2021-08-26 09:00:50,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 09:00:50,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:50,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 09:00:50,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-26 09:00:50,138 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-08-26 09:00:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:50,263 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-08-26 09:00:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 09:00:50,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) Word has length 64 [2021-08-26 09:00:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:50,266 INFO L225 Difference]: With dead ends: 46 [2021-08-26 09:00:50,266 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 09:00:50,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2021-08-26 09:00:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 09:00:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-26 09:00:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-26 09:00:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-26 09:00:50,281 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-08-26 09:00:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:50,283 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-26 09:00:50,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 11 states have return successors, (19), 10 states have call predecessors, (19), 3 states have call successors, (19) [2021-08-26 09:00:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-26 09:00:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-26 09:00:50,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:50,285 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:50,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-26 09:00:50,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 09:00:50,486 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-08-26 09:00:50,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:50,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654035233] [2021-08-26 09:00:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:50,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-08-26 09:00:50,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:50,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654035233] [2021-08-26 09:00:50,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654035233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:50,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015187048] [2021-08-26 09:00:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 09:00:50,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:50,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:50,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 09:00:50,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 09:00:50,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:50,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 09:00:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-08-26 09:00:51,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015187048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:51,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:51,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-26 09:00:51,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055149680] [2021-08-26 09:00:51,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 09:00:51,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 09:00:51,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-26 09:00:51,184 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-08-26 09:00:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:51,298 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-08-26 09:00:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 09:00:51,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-08-26 09:00:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:51,300 INFO L225 Difference]: With dead ends: 49 [2021-08-26 09:00:51,300 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 09:00:51,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-08-26 09:00:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 09:00:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-26 09:00:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-08-26 09:00:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-26 09:00:51,303 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-08-26 09:00:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:51,303 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-26 09:00:51,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-08-26 09:00:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-26 09:00:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-26 09:00:51,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:51,304 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:51,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:51,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 09:00:51,517 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-08-26 09:00:51,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:51,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290637351] [2021-08-26 09:00:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:51,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-08-26 09:00:51,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:51,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290637351] [2021-08-26 09:00:51,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290637351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:51,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742358929] [2021-08-26 09:00:51,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 09:00:51,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:51,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:51,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:51,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 09:00:52,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-26 09:00:52,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:52,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 09:00:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-08-26 09:00:52,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742358929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:52,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:52,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-26 09:00:52,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288512162] [2021-08-26 09:00:52,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 09:00:52,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 09:00:52,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-26 09:00:52,304 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-08-26 09:00:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:52,423 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-08-26 09:00:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 09:00:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-08-26 09:00:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:52,424 INFO L225 Difference]: With dead ends: 52 [2021-08-26 09:00:52,424 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 09:00:52,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2021-08-26 09:00:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 09:00:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-26 09:00:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-08-26 09:00:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-08-26 09:00:52,428 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-08-26 09:00:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:52,428 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-08-26 09:00:52,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-08-26 09:00:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-08-26 09:00:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-26 09:00:52,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:52,429 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:52,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:52,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 09:00:52,638 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-08-26 09:00:52,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:52,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23554626] [2021-08-26 09:00:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:52,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-08-26 09:00:52,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:52,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23554626] [2021-08-26 09:00:52,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23554626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:52,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906434747] [2021-08-26 09:00:52,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 09:00:52,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:52,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:52,962 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:52,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 09:00:53,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-26 09:00:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 09:00:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-08-26 09:00:53,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906434747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:53,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:53,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-26 09:00:53,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837993299] [2021-08-26 09:00:53,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 09:00:53,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 09:00:53,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-08-26 09:00:53,534 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-08-26 09:00:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:53,678 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-08-26 09:00:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 09:00:53,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-08-26 09:00:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:53,679 INFO L225 Difference]: With dead ends: 55 [2021-08-26 09:00:53,679 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 09:00:53,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2021-08-26 09:00:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 09:00:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-26 09:00:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-08-26 09:00:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-08-26 09:00:53,683 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-08-26 09:00:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:53,683 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-08-26 09:00:53,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-08-26 09:00:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-08-26 09:00:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-26 09:00:53,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:53,684 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:53,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:53,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 09:00:53,902 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:53,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-08-26 09:00:53,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:53,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816138583] [2021-08-26 09:00:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:53,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:53,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:53,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:53,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:53,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-08-26 09:00:54,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:54,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816138583] [2021-08-26 09:00:54,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816138583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:54,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689166865] [2021-08-26 09:00:54,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 09:00:54,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:54,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:54,183 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:54,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 09:00:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:54,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 09:00:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-08-26 09:00:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689166865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:54,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:54,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-26 09:00:54,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146725007] [2021-08-26 09:00:54,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 09:00:54,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 09:00:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-26 09:00:54,784 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-08-26 09:00:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:54,924 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-08-26 09:00:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 09:00:54,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-08-26 09:00:54,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:54,925 INFO L225 Difference]: With dead ends: 58 [2021-08-26 09:00:54,926 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 09:00:54,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 09:00:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 09:00:54,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-26 09:00:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-08-26 09:00:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-08-26 09:00:54,929 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-08-26 09:00:54,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:54,929 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-08-26 09:00:54,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-08-26 09:00:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-08-26 09:00:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-26 09:00:54,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:54,930 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:54,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:55,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 09:00:55,141 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:55,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-08-26 09:00:55,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:55,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719057550] [2021-08-26 09:00:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:55,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-08-26 09:00:55,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:55,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719057550] [2021-08-26 09:00:55,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719057550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:55,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462290588] [2021-08-26 09:00:55,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:00:55,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:55,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:55,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 09:00:55,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 09:00:55,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 09:00:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-08-26 09:00:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462290588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:56,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:56,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-26 09:00:56,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174231238] [2021-08-26 09:00:56,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 09:00:56,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:56,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 09:00:56,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-08-26 09:00:56,012 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-08-26 09:00:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:56,190 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-08-26 09:00:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 09:00:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-08-26 09:00:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:56,191 INFO L225 Difference]: With dead ends: 61 [2021-08-26 09:00:56,191 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 09:00:56,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 09:00:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 09:00:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-26 09:00:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-08-26 09:00:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-08-26 09:00:56,194 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-08-26 09:00:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:56,194 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-08-26 09:00:56,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-08-26 09:00:56,194 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-08-26 09:00:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-26 09:00:56,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:56,195 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:56,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:56,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:56,396 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:56,396 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-08-26 09:00:56,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:56,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902388480] [2021-08-26 09:00:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:56,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-08-26 09:00:56,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:56,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902388480] [2021-08-26 09:00:56,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902388480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:56,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086510302] [2021-08-26 09:00:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 09:00:56,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:56,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:56,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 09:00:57,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-26 09:00:57,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:57,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 09:00:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-08-26 09:00:57,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086510302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:57,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:57,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-26 09:00:57,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481314160] [2021-08-26 09:00:57,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 09:00:57,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:57,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 09:00:57,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-08-26 09:00:57,408 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-08-26 09:00:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:57,584 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-08-26 09:00:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 09:00:57,584 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) Word has length 100 [2021-08-26 09:00:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:57,585 INFO L225 Difference]: With dead ends: 64 [2021-08-26 09:00:57,585 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 09:00:57,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 09:00:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 09:00:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-26 09:00:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-08-26 09:00:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-08-26 09:00:57,588 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-08-26 09:00:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:57,589 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-08-26 09:00:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-08-26 09:00:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-08-26 09:00:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-26 09:00:57,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:57,590 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:57,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:57,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 09:00:57,801 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-08-26 09:00:57,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:57,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732581699] [2021-08-26 09:00:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:57,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:57,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-08-26 09:00:58,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:58,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732581699] [2021-08-26 09:00:58,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732581699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:58,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290821380] [2021-08-26 09:00:58,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 09:00:58,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:58,133 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:58,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 09:00:58,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 09:00:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 09:00:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-08-26 09:00:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290821380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:58,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:58,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-26 09:00:58,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58484450] [2021-08-26 09:00:58,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 09:00:58,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 09:00:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-08-26 09:00:58,860 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-08-26 09:00:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:59,030 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-08-26 09:00:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 09:00:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) Word has length 106 [2021-08-26 09:00:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:59,031 INFO L225 Difference]: With dead ends: 67 [2021-08-26 09:00:59,031 INFO L226 Difference]: Without dead ends: 63 [2021-08-26 09:00:59,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 09:00:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-26 09:00:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-26 09:00:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-08-26 09:00:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-08-26 09:00:59,035 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-08-26 09:00:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:59,035 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-08-26 09:00:59,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-08-26 09:00:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-08-26 09:00:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-26 09:00:59,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:59,037 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:59,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-26 09:00:59,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 09:00:59,255 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-08-26 09:00:59,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:59,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336970327] [2021-08-26 09:00:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:59,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-08-26 09:00:59,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:59,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336970327] [2021-08-26 09:00:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336970327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:59,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853201643] [2021-08-26 09:00:59,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 09:00:59,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:59,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:59,629 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:59,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 09:01:00,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-26 09:01:00,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:01:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 09:01:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:01:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-08-26 09:01:00,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853201643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:00,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:01:00,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-08-26 09:01:00,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911787882] [2021-08-26 09:01:00,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 09:01:00,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:01:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 09:01:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-08-26 09:01:00,455 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-08-26 09:01:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:01:00,665 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-08-26 09:01:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 09:01:00,665 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) Word has length 112 [2021-08-26 09:01:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:01:00,666 INFO L225 Difference]: With dead ends: 70 [2021-08-26 09:01:00,666 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 09:01:00,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 09:01:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 09:01:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-26 09:01:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-08-26 09:01:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-08-26 09:01:00,670 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-08-26 09:01:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:01:00,670 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-08-26 09:01:00,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-08-26 09:01:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-08-26 09:01:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-26 09:01:00,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:01:00,672 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:01:00,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 09:01:00,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 09:01:00,897 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:01:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:01:00,897 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-08-26 09:01:00,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:01:00,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114973261] [2021-08-26 09:01:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:01:00,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:01:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:00,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:00,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:00,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-08-26 09:01:01,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:01:01,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114973261] [2021-08-26 09:01:01,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114973261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:01,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694606783] [2021-08-26 09:01:01,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 09:01:01,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:01:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:01:01,425 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:01:01,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 09:01:01,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-08-26 09:01:01,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:01:01,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 09:01:01,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:01:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-08-26 09:01:02,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694606783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:02,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:01:02,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-08-26 09:01:02,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452269889] [2021-08-26 09:01:02,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 09:01:02,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:01:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 09:01:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-08-26 09:01:02,266 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-08-26 09:01:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:01:02,495 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-08-26 09:01:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 09:01:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) Word has length 118 [2021-08-26 09:01:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:01:02,496 INFO L225 Difference]: With dead ends: 73 [2021-08-26 09:01:02,496 INFO L226 Difference]: Without dead ends: 69 [2021-08-26 09:01:02,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 09:01:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-26 09:01:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-26 09:01:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-08-26 09:01:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-08-26 09:01:02,500 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-08-26 09:01:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:01:02,500 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-08-26 09:01:02,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 25 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 20 states have return successors, (37), 19 states have call predecessors, (37), 3 states have call successors, (37) [2021-08-26 09:01:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-08-26 09:01:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-26 09:01:02,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:01:02,501 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:01:02,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-26 09:01:02,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:01:02,713 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:01:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:01:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-08-26 09:01:02,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:01:02,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160490095] [2021-08-26 09:01:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:01:02,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:01:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:02,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-08-26 09:01:03,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:01:03,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160490095] [2021-08-26 09:01:03,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160490095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:03,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087323682] [2021-08-26 09:01:03,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 09:01:03,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:01:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:01:03,153 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:01:03,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 09:01:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 09:01:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:01:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-08-26 09:01:04,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087323682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:04,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:01:04,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-08-26 09:01:04,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006129695] [2021-08-26 09:01:04,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 09:01:04,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:01:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 09:01:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-08-26 09:01:04,060 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-08-26 09:01:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:01:04,286 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-08-26 09:01:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 09:01:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) Word has length 124 [2021-08-26 09:01:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:01:04,288 INFO L225 Difference]: With dead ends: 76 [2021-08-26 09:01:04,288 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 09:01:04,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 09:01:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 09:01:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-08-26 09:01:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-08-26 09:01:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-08-26 09:01:04,291 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-08-26 09:01:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:01:04,291 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-08-26 09:01:04,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-08-26 09:01:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-08-26 09:01:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-26 09:01:04,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:01:04,292 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:01:04,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 09:01:04,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:01:04,509 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:01:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:01:04,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-08-26 09:01:04,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:01:04,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210271030] [2021-08-26 09:01:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:01:04,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:01:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:04,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-08-26 09:01:05,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:01:05,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210271030] [2021-08-26 09:01:05,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210271030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:05,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610716491] [2021-08-26 09:01:05,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:01:05,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:01:05,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:01:05,793 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:01:05,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 09:01:06,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 09:01:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:01:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-26 09:01:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:01:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-08-26 09:01:06,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610716491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:06,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:01:06,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2021-08-26 09:01:06,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687531158] [2021-08-26 09:01:06,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-26 09:01:06,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:01:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-26 09:01:06,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 09:01:06,982 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-08-26 09:01:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:01:07,582 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-08-26 09:01:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-26 09:01:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) Word has length 130 [2021-08-26 09:01:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:01:07,583 INFO L225 Difference]: With dead ends: 79 [2021-08-26 09:01:07,583 INFO L226 Difference]: Without dead ends: 75 [2021-08-26 09:01:07,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 09:01:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-26 09:01:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-26 09:01:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-08-26 09:01:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-08-26 09:01:07,586 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-08-26 09:01:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:01:07,587 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-08-26 09:01:07,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2021-08-26 09:01:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-08-26 09:01:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-26 09:01:07,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:01:07,588 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:01:07,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 09:01:07,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 09:01:07,801 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:01:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:01:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-08-26 09:01:07,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:01:07,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817391821] [2021-08-26 09:01:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:01:07,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:01:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:07,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:07,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:07,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:01:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:01:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-08-26 09:01:08,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:01:08,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817391821] [2021-08-26 09:01:08,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817391821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:01:08,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528783294] [2021-08-26 09:01:08,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 09:01:08,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:01:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:01:08,389 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:01:08,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 09:01:09,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-26 09:01:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:01:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 09:01:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:01:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-08-26 09:01:09,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528783294] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:01:09,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 09:01:09,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 28 [2021-08-26 09:01:09,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869233121] [2021-08-26 09:01:09,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 09:01:09,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:01:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 09:01:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-08-26 09:01:09,487 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-08-26 09:01:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:01:09,837 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-08-26 09:01:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 09:01:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) Word has length 136 [2021-08-26 09:01:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:01:09,839 INFO L225 Difference]: With dead ends: 75 [2021-08-26 09:01:09,839 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 09:01:09,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 525.8ms TimeCoverageRelationStatistics Valid=836, Invalid=1614, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 09:01:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 09:01:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 09:01:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 09:01:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 09:01:09,841 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2021-08-26 09:01:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:01:09,841 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 09:01:09,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-08-26 09:01:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 09:01:09,842 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 09:01:09,844 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:01:09,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 09:01:10,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 09:01:10,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 09:01:10,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:01:10,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:01:10,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:01:10,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:01:10,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L853 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 20) (<= 20 ULTIMATE.start_main_~input~0)) [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-08-26 09:01:10,074 INFO L853 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-08-26 09:01:10,075 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-08-26 09:01:10,075 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-08-26 09:01:10,075 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-08-26 09:01:10,078 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 09:01:10,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 09:01:10 BoogieIcfgContainer [2021-08-26 09:01:10,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 09:01:10,081 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 09:01:10,081 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 09:01:10,081 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 09:01:10,081 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:43" (3/4) ... [2021-08-26 09:01:10,083 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 09:01:10,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-08-26 09:01:10,089 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 09:01:10,089 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 09:01:10,089 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 09:01:10,089 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 09:01:10,104 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 09:01:10,104 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 09:01:10,105 INFO L168 Benchmark]: Toolchain (without parser) took 27494.00 ms. Allocated memory was 65.0 MB in the beginning and 390.1 MB in the end (delta: 325.1 MB). Free memory was 46.0 MB in the beginning and 231.7 MB in the end (delta: -185.7 MB). Peak memory consumption was 137.6 MB. Max. memory is 16.1 GB. [2021-08-26 09:01:10,106 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 65.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:01:10,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 126.55 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 36.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 09:01:10,106 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.92 ms. Allocated memory is still 65.0 MB. Free memory was 36.6 MB in the beginning and 48.8 MB in the end (delta: -12.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 09:01:10,106 INFO L168 Benchmark]: Boogie Preprocessor took 22.11 ms. Allocated memory is still 65.0 MB. Free memory was 48.6 MB in the beginning and 47.8 MB in the end (delta: 853.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:01:10,106 INFO L168 Benchmark]: RCFGBuilder took 303.10 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 36.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 09:01:10,107 INFO L168 Benchmark]: TraceAbstraction took 26967.03 ms. Allocated memory was 65.0 MB in the beginning and 390.1 MB in the end (delta: 325.1 MB). Free memory was 36.3 MB in the beginning and 233.8 MB in the end (delta: -197.5 MB). Peak memory consumption was 128.4 MB. Max. memory is 16.1 GB. [2021-08-26 09:01:10,107 INFO L168 Benchmark]: Witness Printer took 23.73 ms. Allocated memory is still 390.1 MB. Free memory was 233.8 MB in the beginning and 231.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 09:01:10,108 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 65.0 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 126.55 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 36.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.92 ms. Allocated memory is still 65.0 MB. Free memory was 36.6 MB in the beginning and 48.8 MB in the end (delta: -12.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.11 ms. Allocated memory is still 65.0 MB. Free memory was 48.6 MB in the beginning and 47.8 MB in the end (delta: 853.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 303.10 ms. Allocated memory is still 65.0 MB. Free memory was 47.8 MB in the beginning and 36.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 26967.03 ms. Allocated memory was 65.0 MB in the beginning and 390.1 MB in the end (delta: 325.1 MB). Free memory was 36.3 MB in the beginning and 233.8 MB in the end (delta: -197.5 MB). Peak memory consumption was 128.4 MB. Max. memory is 16.1 GB. * Witness Printer took 23.73 ms. Allocated memory is still 390.1 MB. Free memory was 233.8 MB in the beginning and 231.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26919.0ms, OverallIterations: 22, TraceHistogramMax: 22, EmptinessCheckTime: 24.6ms, AutomataDifference: 3542.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16.4ms, InitialAbstractionConstructionTime: 9.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 303 SDtfs, 848 SDslu, 2846 SDs, 0 SdLazy, 2144 SolverSat, 210 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1195.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2653 GetRequests, 2062 SyntacticMatches, 2 SemanticMatches, 589 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 4828.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=21, InterpolantAutomatonStates: 361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 102.7ms AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 5.4ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 5.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 236.2ms SsaConstructionTime, 834.0ms SatisfiabilityAnalysisTime, 12292.9ms InterpolantComputationTime, 3202 NumberOfCodeBlocks, 3202 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3159 ConstructedInterpolants, 0 QuantifiedInterpolants, 8451 SizeOfPredicates, 232 NumberOfNonLiveVariables, 4326 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 11466/20328 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 RESULT: Ultimate proved your program to be correct! [2021-08-26 09:01:10,145 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...