./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/gr2006.i -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 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 10:09:35,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 10:09:35,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 10:09:35,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 10:09:35,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 10:09:35,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 10:09:35,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 10:09:35,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 10:09:35,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 10:09:35,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 10:09:35,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 10:09:35,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 10:09:35,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 10:09:35,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 10:09:35,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 10:09:35,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 10:09:35,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 10:09:35,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 10:09:35,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 10:09:35,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 10:09:35,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 10:09:35,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 10:09:35,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 10:09:35,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 10:09:35,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 10:09:35,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 10:09:35,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 10:09:35,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 10:09:35,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 10:09:35,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 10:09:35,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 10:09:35,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 10:09:35,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 10:09:35,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 10:09:35,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 10:09:35,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 10:09:35,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 10:09:35,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 10:09:35,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 10:09:35,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 10:09:35,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 10:09:35,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 10:09:35,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 10:09:35,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 10:09:35,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 10:09:35,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 10:09:35,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 10:09:35,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 10:09:35,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 10:09:35,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 10:09:35,839 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 10:09:35,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 10:09:35,840 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 10:09:35,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 10:09:35,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 10:09:35,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 10:09:35,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 10:09:35,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 10:09:35,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 10:09:35,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 10:09:35,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 10:09:35,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 10:09:35,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 10:09:35,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 10:09:35,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 10:09:35,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 10:09:35,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:09:35,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 10:09:35,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 10:09:35,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 10:09:35,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 10:09:35,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 10:09:35,844 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 10:09:35,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 10:09:35,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 10:09:35,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 10:09:35,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ef045eb54c58e8ecfe4972142a43378e1f3b08091dc3d5b7e399cf5703f1724 [2021-12-17 10:09:36,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 10:09:36,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 10:09:36,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 10:09:36,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 10:09:36,084 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 10:09:36,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gr2006.i [2021-12-17 10:09:36,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d336778b9/0e404684b4ca4f309d0209077046d6ea/FLAGd04e2d301 [2021-12-17 10:09:36,462 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 10:09:36,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i [2021-12-17 10:09:36,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d336778b9/0e404684b4ca4f309d0209077046d6ea/FLAGd04e2d301 [2021-12-17 10:09:36,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d336778b9/0e404684b4ca4f309d0209077046d6ea [2021-12-17 10:09:36,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 10:09:36,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 10:09:36,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 10:09:36,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 10:09:36,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 10:09:36,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:09:36" (1/1) ... [2021-12-17 10:09:36,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b188adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:36, skipping insertion in model container [2021-12-17 10:09:36,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:09:36" (1/1) ... [2021-12-17 10:09:36,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 10:09:36,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 10:09:37,059 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-12-17 10:09:37,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:09:37,086 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 10:09:37,094 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i[895,908] [2021-12-17 10:09:37,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 10:09:37,105 INFO L208 MainTranslator]: Completed translation [2021-12-17 10:09:37,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37 WrapperNode [2021-12-17 10:09:37,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 10:09:37,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 10:09:37,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 10:09:37,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 10:09:37,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,126 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-12-17 10:09:37,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 10:09:37,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 10:09:37,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 10:09:37,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 10:09:37,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 10:09:37,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 10:09:37,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 10:09:37,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 10:09:37,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (1/1) ... [2021-12-17 10:09:37,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 10:09:37,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:37,185 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) [2021-12-17 10:09:37,192 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 [2021-12-17 10:09:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 10:09:37,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 10:09:37,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 10:09:37,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 10:09:37,260 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 10:09:37,262 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 10:09:37,360 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 10:09:37,365 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 10:09:37,366 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 10:09:37,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:09:37 BoogieIcfgContainer [2021-12-17 10:09:37,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 10:09:37,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 10:09:37,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 10:09:37,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 10:09:37,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:09:36" (1/3) ... [2021-12-17 10:09:37,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b5082b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:09:37, skipping insertion in model container [2021-12-17 10:09:37,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:09:37" (2/3) ... [2021-12-17 10:09:37,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b5082b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:09:37, skipping insertion in model container [2021-12-17 10:09:37,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:09:37" (3/3) ... [2021-12-17 10:09:37,376 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-12-17 10:09:37,380 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 10:09:37,380 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 10:09:37,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 10:09:37,416 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-17 10:09:37,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 10:09:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 10:09:37,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:37,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 10:09:37,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-12-17 10:09:37,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:37,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759089013] [2021-12-17 10:09:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:37,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:37,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:37,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759089013] [2021-12-17 10:09:37,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759089013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:09:37,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:09:37,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 10:09:37,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194704421] [2021-12-17 10:09:37,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:09:37,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 10:09:37,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 10:09:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 10:09:37,546 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:37,557 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-12-17 10:09:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 10:09:37,559 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 10:09:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:37,564 INFO L225 Difference]: With dead ends: 21 [2021-12-17 10:09:37,564 INFO L226 Difference]: Without dead ends: 9 [2021-12-17 10:09:37,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 10:09:37,570 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:37,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:09:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-17 10:09:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-17 10:09:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-17 10:09:37,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-17 10:09:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:37,592 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-17 10:09:37,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-17 10:09:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 10:09:37,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:37,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:37,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 10:09:37,594 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:37,597 INFO L85 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-12-17 10:09:37,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:37,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382411140] [2021-12-17 10:09:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:37,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:37,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382411140] [2021-12-17 10:09:37,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382411140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:09:37,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:09:37,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 10:09:37,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146835377] [2021-12-17 10:09:37,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:09:37,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 10:09:37,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 10:09:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:09:37,643 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:37,653 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-12-17 10:09:37,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 10:09:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 10:09:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:37,654 INFO L225 Difference]: With dead ends: 23 [2021-12-17 10:09:37,654 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 10:09:37,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 10:09:37,656 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:37,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:09:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 10:09:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-12-17 10:09:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-12-17 10:09:37,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-12-17 10:09:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:37,659 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-12-17 10:09:37,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-12-17 10:09:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 10:09:37,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:37,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:37,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 10:09:37,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-12-17 10:09:37,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:37,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606415491] [2021-12-17 10:09:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:37,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:37,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606415491] [2021-12-17 10:09:37,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606415491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 10:09:37,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 10:09:37,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 10:09:37,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582447] [2021-12-17 10:09:37,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 10:09:37,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 10:09:37,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 10:09:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 10:09:37,702 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:37,716 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-12-17 10:09:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 10:09:37,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 10:09:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:37,717 INFO L225 Difference]: With dead ends: 18 [2021-12-17 10:09:37,717 INFO L226 Difference]: Without dead ends: 14 [2021-12-17 10:09:37,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 10:09:37,719 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:37,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:09:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-17 10:09:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-17 10:09:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-17 10:09:37,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-17 10:09:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:37,722 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-17 10:09:37,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-17 10:09:37,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 10:09:37,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:37,723 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:37,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 10:09:37,724 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:37,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:37,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1661002755, now seen corresponding path program 1 times [2021-12-17 10:09:37,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:37,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056902413] [2021-12-17 10:09:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:37,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:37,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:37,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056902413] [2021-12-17 10:09:37,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056902413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:37,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930719074] [2021-12-17 10:09:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:37,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:37,753 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) [2021-12-17 10:09:37,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 10:09:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 10:09:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:37,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:37,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930719074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:37,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:37,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 10:09:37,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400767965] [2021-12-17 10:09:37,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:37,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 10:09:37,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:37,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 10:09:37,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:09:37,867 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:37,889 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-12-17 10:09:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 10:09:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 10:09:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:37,890 INFO L225 Difference]: With dead ends: 35 [2021-12-17 10:09:37,890 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 10:09:37,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 10:09:37,892 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:37,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:09:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 10:09:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-17 10:09:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-17 10:09:37,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 11 [2021-12-17 10:09:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:37,897 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-17 10:09:37,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-17 10:09:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 10:09:37,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:37,898 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:37,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 10:09:38,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:38,115 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1073415472, now seen corresponding path program 2 times [2021-12-17 10:09:38,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25032810] [2021-12-17 10:09:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:38,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:38,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:38,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25032810] [2021-12-17 10:09:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25032810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:38,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394236547] [2021-12-17 10:09:38,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:09:38,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:38,214 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) [2021-12-17 10:09:38,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 10:09:38,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:09:38,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:38,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 10:09:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 10:09:38,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 10:09:38,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394236547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:38,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:38,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-17 10:09:38,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671575885] [2021-12-17 10:09:38,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:38,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 10:09:38,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 10:09:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-17 10:09:38,459 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:38,575 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-12-17 10:09:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 10:09:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-17 10:09:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:38,577 INFO L225 Difference]: With dead ends: 47 [2021-12-17 10:09:38,577 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 10:09:38,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-12-17 10:09:38,578 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:38,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:09:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 10:09:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-12-17 10:09:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-17 10:09:38,582 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2021-12-17 10:09:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-17 10:09:38,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-17 10:09:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 10:09:38,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:38,584 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:38,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 10:09:38,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:38,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:38,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1219917565, now seen corresponding path program 3 times [2021-12-17 10:09:38,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:38,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607704856] [2021-12-17 10:09:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:38,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:38,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:38,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607704856] [2021-12-17 10:09:38,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607704856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:38,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683594524] [2021-12-17 10:09:38,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:09:38,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:38,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:38,881 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) [2021-12-17 10:09:38,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 10:09:38,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 10:09:38,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 10:09:38,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:38,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:39,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683594524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:39,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:39,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-17 10:09:39,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216955778] [2021-12-17 10:09:39,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:39,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 10:09:39,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 10:09:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-12-17 10:09:39,138 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:39,170 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-12-17 10:09:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 10:09:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 10:09:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:39,171 INFO L225 Difference]: With dead ends: 80 [2021-12-17 10:09:39,171 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 10:09:39,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-12-17 10:09:39,172 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:39,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:09:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 10:09:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-12-17 10:09:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-12-17 10:09:39,177 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 35 [2021-12-17 10:09:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:39,178 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-12-17 10:09:39,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-12-17 10:09:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 10:09:39,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:39,179 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 12, 5, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:39,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 10:09:39,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:39,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1918910832, now seen corresponding path program 4 times [2021-12-17 10:09:39,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657374277] [2021-12-17 10:09:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:39,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:39,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:39,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657374277] [2021-12-17 10:09:39,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657374277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451637948] [2021-12-17 10:09:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 10:09:39,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:39,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:39,574 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) [2021-12-17 10:09:39,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 10:09:39,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 10:09:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:39,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 10:09:39,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:39,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 164 proven. 222 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:39,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451637948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:39,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:39,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-12-17 10:09:39,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462681811] [2021-12-17 10:09:39,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:39,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 10:09:39,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 10:09:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:09:39,988 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:40,069 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2021-12-17 10:09:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 10:09:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-17 10:09:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:40,071 INFO L225 Difference]: With dead ends: 122 [2021-12-17 10:09:40,071 INFO L226 Difference]: Without dead ends: 102 [2021-12-17 10:09:40,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-12-17 10:09:40,072 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:40,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:09:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-17 10:09:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-12-17 10:09:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-12-17 10:09:40,079 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 56 [2021-12-17 10:09:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:40,079 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-12-17 10:09:40,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:40,080 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-12-17 10:09:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 10:09:40,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:40,082 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 26, 5, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:40,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 10:09:40,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:40,299 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash -707387216, now seen corresponding path program 5 times [2021-12-17 10:09:40,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:40,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132072731] [2021-12-17 10:09:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:40,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 346 proven. 1027 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:40,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132072731] [2021-12-17 10:09:40,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132072731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:40,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486657738] [2021-12-17 10:09:40,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 10:09:40,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:40,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:40,624 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) [2021-12-17 10:09:40,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 10:09:40,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-17 10:09:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 10:09:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 346 proven. 1027 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:40,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 346 proven. 1027 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 10:09:41,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486657738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:41,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:41,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2021-12-17 10:09:41,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381658722] [2021-12-17 10:09:41,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:41,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 10:09:41,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 10:09:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:09:41,553 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:41,646 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2021-12-17 10:09:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-17 10:09:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-17 10:09:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:41,651 INFO L225 Difference]: With dead ends: 194 [2021-12-17 10:09:41,651 INFO L226 Difference]: Without dead ends: 174 [2021-12-17 10:09:41,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 10:09:41,653 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:41,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 70 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:09:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-17 10:09:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2021-12-17 10:09:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.035294117647059) internal successors, (176), 170 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 176 transitions. [2021-12-17 10:09:41,672 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 176 transitions. Word has length 98 [2021-12-17 10:09:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:41,673 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 176 transitions. [2021-12-17 10:09:41,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.0943396226415096) internal successors, (164), 53 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 176 transitions. [2021-12-17 10:09:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 10:09:41,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:41,679 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 50, 5, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:41,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 10:09:41,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:41,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:41,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1661700912, now seen corresponding path program 6 times [2021-12-17 10:09:41,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:41,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673209239] [2021-12-17 10:09:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:41,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2021-12-17 10:09:42,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:42,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673209239] [2021-12-17 10:09:42,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673209239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:42,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145693738] [2021-12-17 10:09:42,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 10:09:42,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:42,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:42,044 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) [2021-12-17 10:09:42,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 10:09:42,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-12-17 10:09:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 10:09:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2021-12-17 10:09:42,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2021-12-17 10:09:42,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145693738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:42,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:42,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2021-12-17 10:09:42,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007311727] [2021-12-17 10:09:42,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:42,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 10:09:42,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 10:09:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:09:42,452 INFO L87 Difference]: Start difference. First operand 171 states and 176 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:42,474 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2021-12-17 10:09:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 10:09:42,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-12-17 10:09:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:42,476 INFO L225 Difference]: With dead ends: 191 [2021-12-17 10:09:42,476 INFO L226 Difference]: Without dead ends: 187 [2021-12-17 10:09:42,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-17 10:09:42,477 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:42,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 10:09:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-17 10:09:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2021-12-17 10:09:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0404624277456647) internal successors, (180), 173 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2021-12-17 10:09:42,486 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 170 [2021-12-17 10:09:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:42,486 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2021-12-17 10:09:42,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2021-12-17 10:09:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-17 10:09:42,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:42,488 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 50, 6, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:42,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 10:09:42,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:42,707 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1272078235, now seen corresponding path program 7 times [2021-12-17 10:09:42,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:42,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230908522] [2021-12-17 10:09:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:42,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 1681 proven. 86 refuted. 0 times theorem prover too weak. 2853 trivial. 0 not checked. [2021-12-17 10:09:42,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230908522] [2021-12-17 10:09:42,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230908522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645551691] [2021-12-17 10:09:42,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 10:09:42,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:42,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:42,805 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) [2021-12-17 10:09:42,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 10:09:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:42,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-17 10:09:42,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 4518 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 10:09:43,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 4518 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 10:09:44,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645551691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:44,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:44,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 53, 53] total 97 [2021-12-17 10:09:44,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304249800] [2021-12-17 10:09:44,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:44,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-17 10:09:44,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-17 10:09:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 10:09:44,820 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand has 97 states, 97 states have (on average 3.1752577319587627) internal successors, (308), 97 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:45,211 INFO L93 Difference]: Finished difference Result 1033 states and 1353 transitions. [2021-12-17 10:09:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-17 10:09:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.1752577319587627) internal successors, (308), 97 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-17 10:09:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:45,215 INFO L225 Difference]: With dead ends: 1033 [2021-12-17 10:09:45,216 INFO L226 Difference]: Without dead ends: 1029 [2021-12-17 10:09:45,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4400 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-17 10:09:45,218 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 15 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:45,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 274 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 10:09:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-12-17 10:09:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 309. [2021-12-17 10:09:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.1688311688311688) internal successors, (360), 308 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-12-17 10:09:45,231 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 173 [2021-12-17 10:09:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:45,231 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-12-17 10:09:45,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.1752577319587627) internal successors, (308), 97 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-12-17 10:09:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-17 10:09:45,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:45,234 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:45,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 10:09:45,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:45,448 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 8 times [2021-12-17 10:09:45,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:45,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586349234] [2021-12-17 10:09:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:45,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:48,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586349234] [2021-12-17 10:09:48,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586349234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519119180] [2021-12-17 10:09:48,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 10:09:48,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:48,378 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) [2021-12-17 10:09:48,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 10:09:48,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 10:09:48,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 205 conjunts are in the unsatisfiable core [2021-12-17 10:09:48,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:51,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:09:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 10:09:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519119180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:09:52,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:09:52,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 155 [2021-12-17 10:09:52,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524686944] [2021-12-17 10:09:52,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:09:52,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-12-17 10:09:52,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:09:52,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-12-17 10:09:52,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=21012, Unknown=0, NotChecked=0, Total=23870 [2021-12-17 10:09:52,662 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:09:57,631 INFO L93 Difference]: Finished difference Result 4542 states and 5921 transitions. [2021-12-17 10:09:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-17 10:09:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 308 [2021-12-17 10:09:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:09:57,641 INFO L225 Difference]: With dead ends: 4542 [2021-12-17 10:09:57,642 INFO L226 Difference]: Without dead ends: 4382 [2021-12-17 10:09:57,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 558 SyntacticMatches, 8 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8451 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2863, Invalid=21317, Unknown=0, NotChecked=0, Total=24180 [2021-12-17 10:09:57,648 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 249 mSDsluCounter, 15922 mSDsCounter, 0 mSdLazyCounter, 17428 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 16175 SdHoareTripleChecker+Invalid, 17486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 17428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 10:09:57,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 16175 Invalid, 17486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 17428 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 10:09:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-12-17 10:09:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 4186. [2021-12-17 10:09:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 1.0241338112305853) internal successors, (4286), 4185 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 4286 transitions. [2021-12-17 10:09:57,765 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 4286 transitions. Word has length 308 [2021-12-17 10:09:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:09:57,765 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 4286 transitions. [2021-12-17 10:09:57,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:09:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 4286 transitions. [2021-12-17 10:09:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-12-17 10:09:57,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 10:09:57,768 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-12-17 10:09:57,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 10:09:57,985 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,SelfDestructingSolverStorable10 [2021-12-17 10:09:57,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 10:09:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 10:09:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 9 times [2021-12-17 10:09:57,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 10:09:57,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936582449] [2021-12-17 10:09:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 10:09:57,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 10:09:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 10:09:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-17 10:09:59,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 10:09:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936582449] [2021-12-17 10:09:59,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936582449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 10:09:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117351416] [2021-12-17 10:09:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 10:09:59,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:09:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 10:09:59,038 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) [2021-12-17 10:09:59,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 10:09:59,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 102 check-sat command(s) [2021-12-17 10:09:59,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 10:09:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-17 10:09:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 10:09:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-17 10:09:59,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 10:10:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-17 10:10:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117351416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 10:10:00,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 10:10:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 55 [2021-12-17 10:10:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376705563] [2021-12-17 10:10:00,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 10:10:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 10:10:00,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 10:10:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 10:10:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:10:00,297 INFO L87 Difference]: Start difference. First operand 4186 states and 4286 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 10:10:00,492 INFO L93 Difference]: Finished difference Result 4337 states and 4437 transitions. [2021-12-17 10:10:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 10:10:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-12-17 10:10:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 10:10:00,493 INFO L225 Difference]: With dead ends: 4337 [2021-12-17 10:10:00,493 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 10:10:00,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 670 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-12-17 10:10:00,497 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 10:10:00,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 10:10:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 10:10:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 10:10:00,498 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) [2021-12-17 10:10:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 10:10:00,498 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-12-17 10:10:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 10:10:00,498 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 10:10:00,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 10:10:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 10:10:00,499 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 10:10:00,500 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 10:10:00,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 10:10:00,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 10:10:00,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 10:10:02,366 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 10:10:02,366 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-12-17 10:10:02,366 INFO L858 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-12-17 10:10:02,366 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-12-17 10:10:02,366 INFO L861 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-12-17 10:10:02,366 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 10:10:02,366 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 10:10:02,366 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 10:10:02,367 INFO L854 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse3 (<= |ULTIMATE.start_main_~y~0#1| 46)) (.cse4 (<= 46 |ULTIMATE.start_main_~y~0#1|)) (.cse13 (<= |ULTIMATE.start_main_~y~0#1| 39)) (.cse14 (<= 39 |ULTIMATE.start_main_~y~0#1|)) (.cse39 (<= 2 |ULTIMATE.start_main_~y~0#1|)) (.cse40 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse23 (<= |ULTIMATE.start_main_~y~0#1| 43)) (.cse24 (<= 43 |ULTIMATE.start_main_~y~0#1|)) (.cse5 (<= |ULTIMATE.start_main_~y~0#1| 12)) (.cse6 (<= 12 |ULTIMATE.start_main_~y~0#1|)) (.cse43 (<= 29 |ULTIMATE.start_main_~y~0#1|)) (.cse44 (<= |ULTIMATE.start_main_~y~0#1| 29)) (.cse31 (<= 19 |ULTIMATE.start_main_~y~0#1|)) (.cse32 (<= |ULTIMATE.start_main_~y~0#1| 19)) (.cse25 (<= |ULTIMATE.start_main_~y~0#1| 7)) (.cse26 (<= 7 |ULTIMATE.start_main_~y~0#1|)) (.cse55 (<= |ULTIMATE.start_main_~y~0#1| 18)) (.cse56 (<= 18 |ULTIMATE.start_main_~y~0#1|)) (.cse19 (<= |ULTIMATE.start_main_~y~0#1| 4)) (.cse20 (<= 4 |ULTIMATE.start_main_~y~0#1|)) (.cse47 (<= |ULTIMATE.start_main_~y~0#1| 35)) (.cse48 (<= 35 |ULTIMATE.start_main_~y~0#1|)) (.cse9 (<= |ULTIMATE.start_main_~y~0#1| 31)) (.cse10 (<= 31 |ULTIMATE.start_main_~y~0#1|)) (.cse27 (<= 49 |ULTIMATE.start_main_~y~0#1|)) (.cse28 (<= |ULTIMATE.start_main_~y~0#1| 49)) (.cse65 (<= |ULTIMATE.start_main_~y~0#1| 23)) (.cse66 (<= 23 |ULTIMATE.start_main_~y~0#1|)) (.cse69 (<= 37 |ULTIMATE.start_main_~y~0#1|)) (.cse70 (<= |ULTIMATE.start_main_~y~0#1| 37)) (.cse45 (<= |ULTIMATE.start_main_~y~0#1| 17)) (.cse46 (<= 17 |ULTIMATE.start_main_~y~0#1|)) (.cse51 (<= |ULTIMATE.start_main_~y~0#1| 15)) (.cse52 (<= 15 |ULTIMATE.start_main_~y~0#1|)) (.cse67 (<= 9 |ULTIMATE.start_main_~y~0#1|)) (.cse68 (<= |ULTIMATE.start_main_~y~0#1| 9)) (.cse75 (<= |ULTIMATE.start_main_~y~0#1| 11)) (.cse76 (<= 11 |ULTIMATE.start_main_~y~0#1|)) (.cse7 (<= 24 |ULTIMATE.start_main_~y~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~y~0#1| 24)) (.cse86 (<= |ULTIMATE.start_main_~y~0#1| 32)) (.cse85 (<= 32 |ULTIMATE.start_main_~y~0#1|)) (.cse82 (<= |ULTIMATE.start_main_~y~0#1| 30)) (.cse81 (<= 30 |ULTIMATE.start_main_~y~0#1|)) (.cse29 (<= 26 |ULTIMATE.start_main_~y~0#1|)) (.cse30 (<= |ULTIMATE.start_main_~y~0#1| 26)) (.cse37 (<= |ULTIMATE.start_main_~y~0#1| 44)) (.cse38 (<= 44 |ULTIMATE.start_main_~y~0#1|)) (.cse59 (<= 13 |ULTIMATE.start_main_~y~0#1|)) (.cse60 (<= |ULTIMATE.start_main_~y~0#1| 13)) (.cse71 (<= |ULTIMATE.start_main_~y~0#1| 27)) (.cse72 (<= 27 |ULTIMATE.start_main_~y~0#1|)) (.cse49 (<= 34 |ULTIMATE.start_main_~y~0#1|)) (.cse50 (<= |ULTIMATE.start_main_~y~0#1| 34)) (.cse2 (= |ULTIMATE.start_main_~y~0#1| 0)) (.cse87 (<= |ULTIMATE.start_main_~y~0#1| 8)) (.cse88 (<= 8 |ULTIMATE.start_main_~y~0#1|)) (.cse61 (<= 36 |ULTIMATE.start_main_~y~0#1|)) (.cse62 (<= |ULTIMATE.start_main_~y~0#1| 36)) (.cse17 (<= |ULTIMATE.start_main_~y~0#1| 14)) (.cse18 (<= 14 |ULTIMATE.start_main_~y~0#1|)) (.cse57 (<= 45 |ULTIMATE.start_main_~y~0#1|)) (.cse58 (<= |ULTIMATE.start_main_~y~0#1| 45)) (.cse83 (<= |ULTIMATE.start_main_~y~0#1| 48)) (.cse84 (<= 48 |ULTIMATE.start_main_~y~0#1|)) (.cse35 (<= 28 |ULTIMATE.start_main_~y~0#1|)) (.cse36 (<= |ULTIMATE.start_main_~y~0#1| 28)) (.cse53 (<= |ULTIMATE.start_main_~y~0#1| 47)) (.cse54 (<= 47 |ULTIMATE.start_main_~y~0#1|)) (.cse95 (<= |ULTIMATE.start_main_~y~0#1| 21)) (.cse96 (<= 21 |ULTIMATE.start_main_~y~0#1|)) (.cse21 (<= 38 |ULTIMATE.start_main_~y~0#1|)) (.cse22 (<= |ULTIMATE.start_main_~y~0#1| 38)) (.cse79 (<= 22 |ULTIMATE.start_main_~y~0#1|)) (.cse80 (<= |ULTIMATE.start_main_~y~0#1| 22)) (.cse73 (<= |ULTIMATE.start_main_~y~0#1| 3)) (.cse74 (<= 3 |ULTIMATE.start_main_~y~0#1|)) (.cse77 (<= |ULTIMATE.start_main_~y~0#1| 25)) (.cse78 (<= 25 |ULTIMATE.start_main_~y~0#1|)) (.cse91 (<= 40 |ULTIMATE.start_main_~y~0#1|)) (.cse92 (<= |ULTIMATE.start_main_~y~0#1| 40)) (.cse41 (<= 5 |ULTIMATE.start_main_~y~0#1|)) (.cse42 (<= |ULTIMATE.start_main_~y~0#1| 5)) (.cse93 (<= |ULTIMATE.start_main_~y~0#1| 1)) (.cse94 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse63 (<= 33 |ULTIMATE.start_main_~y~0#1|)) (.cse64 (<= |ULTIMATE.start_main_~y~0#1| 33)) (.cse15 (<= 10 |ULTIMATE.start_main_~y~0#1|)) (.cse16 (<= |ULTIMATE.start_main_~y~0#1| 10)) (.cse34 (<= |ULTIMATE.start_main_~y~0#1| 42)) (.cse33 (<= 42 |ULTIMATE.start_main_~y~0#1|)) (.cse97 (<= 20 |ULTIMATE.start_main_~y~0#1|)) (.cse98 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse89 (<= 6 |ULTIMATE.start_main_~y~0#1|)) (.cse90 (<= |ULTIMATE.start_main_~y~0#1| 6)) (.cse0 (<= |ULTIMATE.start_main_~y~0#1| 41)) (.cse1 (<= 41 |ULTIMATE.start_main_~y~0#1|)) (.cse11 (<= |ULTIMATE.start_main_~y~0#1| 16)) (.cse12 (<= 16 |ULTIMATE.start_main_~y~0#1|))) (or (and (<= 59 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 59) .cse0 .cse1) (and (= |ULTIMATE.start_main_~x~0#1| 0) .cse2) (and .cse3 (= |ULTIMATE.start_main_~x~0#1| 46) .cse4) (and (<= |ULTIMATE.start_main_~x~0#1| 88) .cse5 .cse6 (<= 88 |ULTIMATE.start_main_~x~0#1|)) (and .cse7 .cse8 (= |ULTIMATE.start_main_~x~0#1| 24)) (and (= |ULTIMATE.start_main_~x~0#1| 31) .cse9 .cse10) (and (<= |ULTIMATE.start_main_~x~0#1| 84) .cse11 (<= 84 |ULTIMATE.start_main_~x~0#1|) .cse12) (and .cse13 .cse14 (= |ULTIMATE.start_main_~x~0#1| 39)) (and .cse15 (= |ULTIMATE.start_main_~x~0#1| 10) .cse16) (and (= |ULTIMATE.start_main_~x~0#1| 14) .cse17 .cse18) (and .cse19 (= |ULTIMATE.start_main_~x~0#1| 4) .cse20) (and .cse21 .cse22 (= |ULTIMATE.start_main_~x~0#1| 38)) (and .cse3 (<= 54 |ULTIMATE.start_main_~x~0#1|) .cse4 (<= |ULTIMATE.start_main_~x~0#1| 54)) (and (<= |ULTIMATE.start_main_~x~0#1| 61) .cse13 .cse14 (<= 61 |ULTIMATE.start_main_~x~0#1|)) (and .cse23 (<= |ULTIMATE.start_main_~x~0#1| 57) (<= 57 |ULTIMATE.start_main_~x~0#1|) .cse24) (and (= |ULTIMATE.start_main_~x~0#1| 7) .cse25 .cse26) (and .cse27 .cse28 (= |ULTIMATE.start_main_~x~0#1| 49)) (and (<= |ULTIMATE.start_main_~x~0#1| 74) .cse29 (<= 74 |ULTIMATE.start_main_~x~0#1|) .cse30) (and (= |ULTIMATE.start_main_~x~0#1| 19) .cse31 .cse32) (and .cse33 (<= 58 |ULTIMATE.start_main_~x~0#1|) .cse34 (<= |ULTIMATE.start_main_~x~0#1| 58)) (and .cse35 .cse36 (= |ULTIMATE.start_main_~x~0#1| 28)) (and (<= |ULTIMATE.start_main_~x~0#1| 56) (<= 56 |ULTIMATE.start_main_~x~0#1|) .cse37 .cse38) (and .cse39 .cse40 (<= |ULTIMATE.start_main_~x~0#1| 98) (<= 98 |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~x~0#1| 95) .cse41 .cse42 (<= 95 |ULTIMATE.start_main_~x~0#1|)) (and .cse43 .cse44 (<= |ULTIMATE.start_main_~x~0#1| 71) (<= 71 |ULTIMATE.start_main_~x~0#1|)) (and .cse45 .cse46 (<= |ULTIMATE.start_main_~x~0#1| 83) (<= 83 |ULTIMATE.start_main_~x~0#1|)) (and (<= 65 |ULTIMATE.start_main_~x~0#1|) .cse47 (<= |ULTIMATE.start_main_~x~0#1| 65) .cse48) (and .cse49 .cse50 (= |ULTIMATE.start_main_~x~0#1| 34)) (and .cse51 .cse52 (<= |ULTIMATE.start_main_~x~0#1| 85) (<= 85 |ULTIMATE.start_main_~x~0#1|)) (and .cse53 (<= |ULTIMATE.start_main_~x~0#1| 53) .cse54 (<= 53 |ULTIMATE.start_main_~x~0#1|)) (and (= |ULTIMATE.start_main_~x~0#1| 2) .cse39 .cse40) (and .cse23 (= |ULTIMATE.start_main_~x~0#1| 43) .cse24) (and .cse55 .cse56 (= |ULTIMATE.start_main_~x~0#1| 18)) (and .cse57 (= |ULTIMATE.start_main_~x~0#1| 45) .cse58) (and .cse59 (= |ULTIMATE.start_main_~x~0#1| 13) .cse60) (and (<= |ULTIMATE.start_main_~x~0#1| 64) .cse61 (<= 64 |ULTIMATE.start_main_~x~0#1|) .cse62) (and .cse63 .cse64 (<= 67 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 67)) (and .cse5 (= |ULTIMATE.start_main_~x~0#1| 12) .cse6) (and .cse65 .cse66 (= |ULTIMATE.start_main_~x~0#1| 23)) (and .cse43 (= |ULTIMATE.start_main_~x~0#1| 29) .cse44) (and .cse67 (<= 91 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 91) .cse68) (and .cse69 .cse70 (= |ULTIMATE.start_main_~x~0#1| 37)) (and (<= 81 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 81) .cse31 .cse32) (and (<= |ULTIMATE.start_main_~x~0#1| 93) (<= 93 |ULTIMATE.start_main_~x~0#1|) .cse25 .cse26) (and (= |ULTIMATE.start_main_~x~0#1| 27) .cse71 .cse72) (and .cse55 (<= 82 |ULTIMATE.start_main_~x~0#1|) .cse56 (<= |ULTIMATE.start_main_~x~0#1| 82)) (and (<= 96 |ULTIMATE.start_main_~x~0#1|) .cse19 .cse20 (<= |ULTIMATE.start_main_~x~0#1| 96)) (and .cse47 .cse48 (= |ULTIMATE.start_main_~x~0#1| 35)) (and (= |ULTIMATE.start_main_~x~0#1| 3) .cse73 .cse74) (and (<= 89 |ULTIMATE.start_main_~x~0#1|) .cse75 .cse76 (<= |ULTIMATE.start_main_~x~0#1| 89)) (and (= |ULTIMATE.start_main_~x~0#1| 25) .cse77 .cse78) (and (= |ULTIMATE.start_main_~x~0#1| 22) .cse79 .cse80) (and (<= 70 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 70) .cse81 .cse82) (and (<= |ULTIMATE.start_main_~x~0#1| 69) .cse9 .cse10 (<= 69 |ULTIMATE.start_main_~x~0#1|)) (and (<= 51 |ULTIMATE.start_main_~x~0#1|) .cse27 (<= |ULTIMATE.start_main_~x~0#1| 51) .cse28) (and .cse83 (<= |ULTIMATE.start_main_~x~0#1| 52) (<= 52 |ULTIMATE.start_main_~x~0#1|) .cse84) (and .cse65 .cse66 (<= |ULTIMATE.start_main_~x~0#1| 77) (<= 77 |ULTIMATE.start_main_~x~0#1|)) (and .cse69 (<= |ULTIMATE.start_main_~x~0#1| 63) (<= 63 |ULTIMATE.start_main_~x~0#1|) .cse70) (and .cse45 .cse46 (= |ULTIMATE.start_main_~x~0#1| 17)) (and .cse51 (= |ULTIMATE.start_main_~x~0#1| 15) .cse52) (and (<= |ULTIMATE.start_main_~x~0#1| 68) .cse85 .cse86 (<= 68 |ULTIMATE.start_main_~x~0#1|)) (and .cse67 (= |ULTIMATE.start_main_~x~0#1| 9) .cse68) (and .cse75 .cse76 (= |ULTIMATE.start_main_~x~0#1| 11)) (and (= |ULTIMATE.start_main_~x~0#1| 8) .cse87 .cse88) (and .cse7 (<= |ULTIMATE.start_main_~x~0#1| 76) .cse8 (<= 76 |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~x~0#1| 50) (<= 50 |ULTIMATE.start_main_~x~0#1|) (<= 50 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 50)) (and .cse86 .cse85 (= |ULTIMATE.start_main_~x~0#1| 32)) (and (<= |ULTIMATE.start_main_~x~0#1| 94) .cse89 .cse90 (<= 94 |ULTIMATE.start_main_~x~0#1|)) (and (= |ULTIMATE.start_main_~x~0#1| 30) .cse82 .cse81) (and (= |ULTIMATE.start_main_~x~0#1| 26) .cse29 .cse30) (and (= |ULTIMATE.start_main_~x~0#1| 44) .cse37 .cse38) (and (<= |ULTIMATE.start_main_~x~0#1| 87) .cse59 (<= 87 |ULTIMATE.start_main_~x~0#1|) .cse60) (and (<= |ULTIMATE.start_main_~x~0#1| 73) .cse71 (<= 73 |ULTIMATE.start_main_~x~0#1|) .cse72) (and .cse49 .cse50 (<= |ULTIMATE.start_main_~x~0#1| 66) (<= 66 |ULTIMATE.start_main_~x~0#1|)) (and .cse91 (= |ULTIMATE.start_main_~x~0#1| 40) .cse92) (and (< 99 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 100) .cse2) (and (<= 92 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 92) .cse87 .cse88) (and (= |ULTIMATE.start_main_~x~0#1| 36) .cse61 .cse62) (and (<= |ULTIMATE.start_main_~x~0#1| 86) (<= 86 |ULTIMATE.start_main_~x~0#1|) .cse17 .cse18) (and .cse57 (<= 55 |ULTIMATE.start_main_~x~0#1|) .cse58 (<= |ULTIMATE.start_main_~x~0#1| 55)) (and .cse83 (= |ULTIMATE.start_main_~x~0#1| 48) .cse84) (and .cse93 (<= 99 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 99) .cse94) (and .cse35 .cse36 (<= 72 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 72)) (and .cse95 (<= |ULTIMATE.start_main_~x~0#1| 79) (<= 79 |ULTIMATE.start_main_~x~0#1|) .cse96) (and .cse53 (= |ULTIMATE.start_main_~x~0#1| 47) .cse54) (and .cse95 (= |ULTIMATE.start_main_~x~0#1| 21) .cse96) (and .cse21 .cse22 (<= 62 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 62)) (and (<= |ULTIMATE.start_main_~x~0#1| 78) (<= 78 |ULTIMATE.start_main_~x~0#1|) .cse79 .cse80) (and (<= |ULTIMATE.start_main_~x~0#1| 97) (<= 97 |ULTIMATE.start_main_~x~0#1|) .cse73 .cse74) (and .cse77 (<= 75 |ULTIMATE.start_main_~x~0#1|) .cse78 (<= |ULTIMATE.start_main_~x~0#1| 75)) (and (<= |ULTIMATE.start_main_~x~0#1| 60) .cse91 (<= 60 |ULTIMATE.start_main_~x~0#1|) .cse92) (and .cse41 .cse42 (= |ULTIMATE.start_main_~x~0#1| 5)) (and .cse93 (= |ULTIMATE.start_main_~x~0#1| 1) .cse94) (and .cse63 .cse64 (= |ULTIMATE.start_main_~x~0#1| 33)) (and (<= |ULTIMATE.start_main_~x~0#1| 90) .cse15 (<= 90 |ULTIMATE.start_main_~x~0#1|) .cse16) (and .cse97 (<= |ULTIMATE.start_main_~x~0#1| 80) (<= 80 |ULTIMATE.start_main_~x~0#1|) .cse98) (and .cse34 .cse33 (= |ULTIMATE.start_main_~x~0#1| 42)) (and .cse97 (= |ULTIMATE.start_main_~x~0#1| 20) .cse98) (and .cse89 (= |ULTIMATE.start_main_~x~0#1| 6) .cse90) (and .cse0 (= |ULTIMATE.start_main_~x~0#1| 41) .cse1) (and (= |ULTIMATE.start_main_~x~0#1| 16) .cse11 .cse12))) [2021-12-17 10:10:02,367 INFO L858 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-12-17 10:10:02,367 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-12-17 10:10:02,368 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-12-17 10:10:02,368 INFO L861 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-12-17 10:10:02,370 INFO L732 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1] [2021-12-17 10:10:02,371 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 10:10:02,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 10:10:02 BoogieIcfgContainer [2021-12-17 10:10:02,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 10:10:02,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 10:10:02,423 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 10:10:02,423 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 10:10:02,424 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:09:37" (3/4) ... [2021-12-17 10:10:02,425 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 10:10:02,431 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-12-17 10:10:02,431 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-17 10:10:02,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 10:10:02,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 10:10:02,463 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 10:10:02,463 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 10:10:02,464 INFO L158 Benchmark]: Toolchain (without parser) took 25542.64ms. Allocated memory was 92.3MB in the beginning and 283.1MB in the end (delta: 190.8MB). Free memory was 57.5MB in the beginning and 179.5MB in the end (delta: -122.0MB). Peak memory consumption was 69.1MB. Max. memory is 16.1GB. [2021-12-17 10:10:02,464 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 10:10:02,464 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.87ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 68.5MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 10:10:02,464 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.12ms. Allocated memory is still 92.3MB. Free memory was 68.5MB in the beginning and 67.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 10:10:02,465 INFO L158 Benchmark]: Boogie Preprocessor took 14.14ms. Allocated memory is still 92.3MB. Free memory was 67.2MB in the beginning and 66.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 10:10:02,465 INFO L158 Benchmark]: RCFGBuilder took 225.03ms. Allocated memory is still 92.3MB. Free memory was 66.1MB in the beginning and 57.4MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 10:10:02,466 INFO L158 Benchmark]: TraceAbstraction took 25053.73ms. Allocated memory was 92.3MB in the beginning and 283.1MB in the end (delta: 190.8MB). Free memory was 57.0MB in the beginning and 182.6MB in the end (delta: -125.6MB). Peak memory consumption was 170.7MB. Max. memory is 16.1GB. [2021-12-17 10:10:02,466 INFO L158 Benchmark]: Witness Printer took 40.29ms. Allocated memory is still 283.1MB. Free memory was 182.6MB in the beginning and 179.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 10:10:02,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 65.6MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.87ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 68.5MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.12ms. Allocated memory is still 92.3MB. Free memory was 68.5MB in the beginning and 67.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.14ms. Allocated memory is still 92.3MB. Free memory was 67.2MB in the beginning and 66.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 225.03ms. Allocated memory is still 92.3MB. Free memory was 66.1MB in the beginning and 57.4MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 25053.73ms. Allocated memory was 92.3MB in the beginning and 283.1MB in the end (delta: 190.8MB). Free memory was 57.0MB in the beginning and 182.6MB in the end (delta: -125.6MB). Peak memory consumption was 170.7MB. Max. memory is 16.1GB. * Witness Printer took 40.29ms. Allocated memory is still 283.1MB. Free memory was 182.6MB in the beginning and 179.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.0s, OverallIterations: 12, TraceHistogramMax: 102, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 394 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 394 mSDsluCounter, 16830 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 16432 mSDsCounter, 384 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18659 IncrementalHoareTripleChecker+Invalid, 19043 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 384 mSolverCounterUnsat, 398 mSDtfsCounter, 18659 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2666 GetRequests, 2227 SyntacticMatches, 10 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13439 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4186occurred in iteration=11, InterpolantAutomatonStates: 349, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 952 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 1160 HoareAnnotationTreeSize, 3 FomulaSimplifications, 5202 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 2386 NumberOfCodeBlocks, 2308 NumberOfCodeBlocksAsserted, 192 NumberOfCheckSat, 3538 ConstructedInterpolants, 0 QuantifiedInterpolants, 11173 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2741 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 52962/124947 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((59 <= x && x <= 59) && y <= 41) && 41 <= y) || (x == 0 && y == 0)) || ((y <= 46 && x == 46) && 46 <= y)) || (((x <= 88 && y <= 12) && 12 <= y) && 88 <= x)) || ((24 <= y && y <= 24) && x == 24)) || ((x == 31 && y <= 31) && 31 <= y)) || (((x <= 84 && y <= 16) && 84 <= x) && 16 <= y)) || ((y <= 39 && 39 <= y) && x == 39)) || ((10 <= y && x == 10) && y <= 10)) || ((x == 14 && y <= 14) && 14 <= y)) || ((y <= 4 && x == 4) && 4 <= y)) || ((38 <= y && y <= 38) && x == 38)) || (((y <= 46 && 54 <= x) && 46 <= y) && x <= 54)) || (((x <= 61 && y <= 39) && 39 <= y) && 61 <= x)) || (((y <= 43 && x <= 57) && 57 <= x) && 43 <= y)) || ((x == 7 && y <= 7) && 7 <= y)) || ((49 <= y && y <= 49) && x == 49)) || (((x <= 74 && 26 <= y) && 74 <= x) && y <= 26)) || ((x == 19 && 19 <= y) && y <= 19)) || (((42 <= y && 58 <= x) && y <= 42) && x <= 58)) || ((28 <= y && y <= 28) && x == 28)) || (((x <= 56 && 56 <= x) && y <= 44) && 44 <= y)) || (((2 <= y && y <= 2) && x <= 98) && 98 <= x)) || (((x <= 95 && 5 <= y) && y <= 5) && 95 <= x)) || (((29 <= y && y <= 29) && x <= 71) && 71 <= x)) || (((y <= 17 && 17 <= y) && x <= 83) && 83 <= x)) || (((65 <= x && y <= 35) && x <= 65) && 35 <= y)) || ((34 <= y && y <= 34) && x == 34)) || (((y <= 15 && 15 <= y) && x <= 85) && 85 <= x)) || (((y <= 47 && x <= 53) && 47 <= y) && 53 <= x)) || ((x == 2 && 2 <= y) && y <= 2)) || ((y <= 43 && x == 43) && 43 <= y)) || ((y <= 18 && 18 <= y) && x == 18)) || ((45 <= y && x == 45) && y <= 45)) || ((13 <= y && x == 13) && y <= 13)) || (((x <= 64 && 36 <= y) && 64 <= x) && y <= 36)) || (((33 <= y && y <= 33) && 67 <= x) && x <= 67)) || ((y <= 12 && x == 12) && 12 <= y)) || ((y <= 23 && 23 <= y) && x == 23)) || ((29 <= y && x == 29) && y <= 29)) || (((9 <= y && 91 <= x) && x <= 91) && y <= 9)) || ((37 <= y && y <= 37) && x == 37)) || (((81 <= x && x <= 81) && 19 <= y) && y <= 19)) || (((x <= 93 && 93 <= x) && y <= 7) && 7 <= y)) || ((x == 27 && y <= 27) && 27 <= y)) || (((y <= 18 && 82 <= x) && 18 <= y) && x <= 82)) || (((96 <= x && y <= 4) && 4 <= y) && x <= 96)) || ((y <= 35 && 35 <= y) && x == 35)) || ((x == 3 && y <= 3) && 3 <= y)) || (((89 <= x && y <= 11) && 11 <= y) && x <= 89)) || ((x == 25 && y <= 25) && 25 <= y)) || ((x == 22 && 22 <= y) && y <= 22)) || (((70 <= x && x <= 70) && 30 <= y) && y <= 30)) || (((x <= 69 && y <= 31) && 31 <= y) && 69 <= x)) || (((51 <= x && 49 <= y) && x <= 51) && y <= 49)) || (((y <= 48 && x <= 52) && 52 <= x) && 48 <= y)) || (((y <= 23 && 23 <= y) && x <= 77) && 77 <= x)) || (((37 <= y && x <= 63) && 63 <= x) && y <= 37)) || ((y <= 17 && 17 <= y) && x == 17)) || ((y <= 15 && x == 15) && 15 <= y)) || (((x <= 68 && 32 <= y) && y <= 32) && 68 <= x)) || ((9 <= y && x == 9) && y <= 9)) || ((y <= 11 && 11 <= y) && x == 11)) || ((x == 8 && y <= 8) && 8 <= y)) || (((24 <= y && x <= 76) && y <= 24) && 76 <= x)) || (((x <= 50 && 50 <= x) && 50 <= y) && y <= 50)) || ((y <= 32 && 32 <= y) && x == 32)) || (((x <= 94 && 6 <= y) && y <= 6) && 94 <= x)) || ((x == 30 && y <= 30) && 30 <= y)) || ((x == 26 && 26 <= y) && y <= 26)) || ((x == 44 && y <= 44) && 44 <= y)) || (((x <= 87 && 13 <= y) && 87 <= x) && y <= 13)) || (((x <= 73 && y <= 27) && 73 <= x) && 27 <= y)) || (((34 <= y && y <= 34) && x <= 66) && 66 <= x)) || ((40 <= y && x == 40) && y <= 40)) || ((99 < x && x <= 100) && y == 0)) || (((92 <= x && x <= 92) && y <= 8) && 8 <= y)) || ((x == 36 && 36 <= y) && y <= 36)) || (((x <= 86 && 86 <= x) && y <= 14) && 14 <= y)) || (((45 <= y && 55 <= x) && y <= 45) && x <= 55)) || ((y <= 48 && x == 48) && 48 <= y)) || (((y <= 1 && 99 <= x) && x <= 99) && 1 <= y)) || (((28 <= y && y <= 28) && 72 <= x) && x <= 72)) || (((y <= 21 && x <= 79) && 79 <= x) && 21 <= y)) || ((y <= 47 && x == 47) && 47 <= y)) || ((y <= 21 && x == 21) && 21 <= y)) || (((38 <= y && y <= 38) && 62 <= x) && x <= 62)) || (((x <= 78 && 78 <= x) && 22 <= y) && y <= 22)) || (((x <= 97 && 97 <= x) && y <= 3) && 3 <= y)) || (((y <= 25 && 75 <= x) && 25 <= y) && x <= 75)) || (((x <= 60 && 40 <= y) && 60 <= x) && y <= 40)) || ((5 <= y && y <= 5) && x == 5)) || ((y <= 1 && x == 1) && 1 <= y)) || ((33 <= y && y <= 33) && x == 33)) || (((x <= 90 && 10 <= y) && 90 <= x) && y <= 10)) || (((20 <= y && x <= 80) && 80 <= x) && y <= 20)) || ((y <= 42 && 42 <= y) && x == 42)) || ((20 <= y && x == 20) && y <= 20)) || ((6 <= y && x == 6) && y <= 6)) || ((y <= 41 && x == 41) && 41 <= y)) || ((x == 16 && y <= 16) && 16 <= y) RESULT: Ultimate proved your program to be correct! [2021-12-17 10:10:02,524 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE