./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/reducercommutativity/sep.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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:03:48,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:03:48,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:03:48,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:03:48,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:03:48,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:03:48,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:03:48,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:03:48,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:03:48,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:03:48,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:03:48,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:03:48,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:03:48,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:03:48,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:03:48,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:03:48,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:03:48,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:03:48,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:03:48,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:03:48,783 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:03:48,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:03:48,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:03:48,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:03:48,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:03:48,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:03:48,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:03:48,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:03:48,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:03:48,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:03:48,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:03:48,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:03:48,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:03:48,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:03:48,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:03:48,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:03:48,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:03:48,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:03:48,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:03:48,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:03:48,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:03:48,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:03:48,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:03:48,846 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:03:48,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:03:48,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:03:48,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:03:48,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:03:48,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:03:48,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:03:48,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:03:48,849 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:03:48,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:03:48,850 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:03:48,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:03:48,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:03:48,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:03:48,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:03:48,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:03:48,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:03:48,851 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:03:48,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:03:48,852 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:03:48,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:03:48,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:03:48,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:03:48,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:03:48,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:03:48,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:03:48,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:03:48,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:03:48,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:03:48,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:03:48,854 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:03:48,854 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:03:48,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:03:48,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2022-07-20 21:03:49,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:03:49,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:03:49,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:03:49,128 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:03:49,128 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:03:49,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2022-07-20 21:03:49,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0279b909e/33722ed9fb72443dbd08c85bb8703d27/FLAGd30090dff [2022-07-20 21:03:49,614 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:03:49,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2022-07-20 21:03:49,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0279b909e/33722ed9fb72443dbd08c85bb8703d27/FLAGd30090dff [2022-07-20 21:03:50,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0279b909e/33722ed9fb72443dbd08c85bb8703d27 [2022-07-20 21:03:50,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:03:50,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:03:50,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:03:50,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:03:50,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:03:50,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbf1c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50, skipping insertion in model container [2022-07-20 21:03:50,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:03:50,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:03:50,198 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/reducercommutativity/sep.i[1298,1311] [2022-07-20 21:03:50,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:03:50,207 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:03:50,224 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/reducercommutativity/sep.i[1298,1311] [2022-07-20 21:03:50,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:03:50,236 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:03:50,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50 WrapperNode [2022-07-20 21:03:50,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:03:50,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:03:50,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:03:50,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:03:50,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,267 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-07-20 21:03:50,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:03:50,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:03:50,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:03:50,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:03:50,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:03:50,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:03:50,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:03:50,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:03:50,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (1/1) ... [2022-07-20 21:03:50,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:03:50,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:50,353 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) [2022-07-20 21:03:50,359 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 [2022-07-20 21:03:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:03:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:03:50,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:03:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:03:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:03:50,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:03:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:03:50,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:03:50,390 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-20 21:03:50,390 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-20 21:03:50,487 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:03:50,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:03:50,698 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:03:50,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:03:50,703 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:03:50,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:03:50 BoogieIcfgContainer [2022-07-20 21:03:50,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:03:50,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:03:50,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:03:50,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:03:50,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:03:50" (1/3) ... [2022-07-20 21:03:50,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0f6a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:03:50, skipping insertion in model container [2022-07-20 21:03:50,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:03:50" (2/3) ... [2022-07-20 21:03:50,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0f6a4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:03:50, skipping insertion in model container [2022-07-20 21:03:50,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:03:50" (3/3) ... [2022-07-20 21:03:50,717 INFO L111 eAbstractionObserver]: Analyzing ICFG sep.i [2022-07-20 21:03:50,729 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:03:50,730 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:03:50,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:03:50,804 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8a0e42c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1167794e [2022-07-20 21:03:50,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:03:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:03:50,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:50,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:50,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2022-07-20 21:03:50,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964234338] [2022-07-20 21:03:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:03:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:03:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:03:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:03:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:51,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964234338] [2022-07-20 21:03:51,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964234338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:03:51,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845892249] [2022-07-20 21:03:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:51,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:51,160 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) [2022-07-20 21:03:51,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:03:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-20 21:03:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:03:51,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:03:51,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845892249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:03:51,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:03:51,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2022-07-20 21:03:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23549151] [2022-07-20 21:03:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:03:51,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:03:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:51,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:03:51,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:51,279 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:51,295 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2022-07-20 21:03:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:03:51,297 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-20 21:03:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:51,303 INFO L225 Difference]: With dead ends: 50 [2022-07-20 21:03:51,303 INFO L226 Difference]: Without dead ends: 22 [2022-07-20 21:03:51,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 21:03:51,309 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2022-07-20 21:03:51,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-20 21:03:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-20 21:03:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-20 21:03:51,339 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2022-07-20 21:03:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:51,340 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-20 21:03:51,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-20 21:03:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:03:51,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:51,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:51,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:51,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-20 21:03:51,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2022-07-20 21:03:51,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:51,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250442166] [2022-07-20 21:03:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:03:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-20 21:03:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:03:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 21:03:51,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:51,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250442166] [2022-07-20 21:03:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250442166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:03:51,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571161048] [2022-07-20 21:03:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:51,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:51,708 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) [2022-07-20 21:03:51,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:03:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:51,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:03:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 21:03:51,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:03:51,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571161048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:03:51,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 21:03:51,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-20 21:03:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377164802] [2022-07-20 21:03:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:03:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:03:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:03:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:03:51,840 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:51,881 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-07-20 21:03:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:03:51,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-20 21:03:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:51,883 INFO L225 Difference]: With dead ends: 43 [2022-07-20 21:03:51,883 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:03:51,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 21:03:51,886 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:51,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:03:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-07-20 21:03:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-20 21:03:51,903 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-20 21:03:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:51,904 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-20 21:03:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-20 21:03:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 21:03:51,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:51,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:51,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:52,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-20 21:03:52,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2022-07-20 21:03:52,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:52,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079878339] [2022-07-20 21:03:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:52,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:03:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:03:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-20 21:03:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 21:03:52,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:52,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079878339] [2022-07-20 21:03:52,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079878339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:03:52,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:03:52,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:03:52,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250480310] [2022-07-20 21:03:52,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:03:52,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:03:52,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:52,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:03:52,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:03:52,228 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:52,257 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-20 21:03:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:03:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-07-20 21:03:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:52,258 INFO L225 Difference]: With dead ends: 39 [2022-07-20 21:03:52,258 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:03:52,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:03:52,260 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:52,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:03:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-20 21:03:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-20 21:03:52,265 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2022-07-20 21:03:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:52,266 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-20 21:03:52,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 21:03:52,266 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-20 21:03:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:03:52,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:52,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:52,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 21:03:52,268 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2022-07-20 21:03:52,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:52,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996853563] [2022-07-20 21:03:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:52,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:03:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 21:03:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-20 21:03:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:03:52,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:52,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996853563] [2022-07-20 21:03:52,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996853563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:03:52,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341206184] [2022-07-20 21:03:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:52,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:52,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:52,356 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) [2022-07-20 21:03:52,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:03:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:03:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 21:03:52,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:03:52,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341206184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:52,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:03:52,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-07-20 21:03:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641624799] [2022-07-20 21:03:52,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:52,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 21:03:52,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:52,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 21:03:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:03:52,629 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:03:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:52,716 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-07-20 21:03:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:03:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-20 21:03:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:52,724 INFO L225 Difference]: With dead ends: 49 [2022-07-20 21:03:52,724 INFO L226 Difference]: Without dead ends: 29 [2022-07-20 21:03:52,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-20 21:03:52,729 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:52,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:03:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-20 21:03:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-20 21:03:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 21:03:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-20 21:03:52,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2022-07-20 21:03:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:52,741 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-20 21:03:52,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:03:52,741 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-20 21:03:52,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:03:52,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:52,742 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:52,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:52,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:52,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2022-07-20 21:03:52,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:52,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779004182] [2022-07-20 21:03:52,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:52,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:53,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:03:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:03:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:53,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:03:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 21:03:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779004182] [2022-07-20 21:03:53,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779004182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:03:53,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472394936] [2022-07-20 21:03:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:03:53,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:53,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:53,464 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) [2022-07-20 21:03:53,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:03:53,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:03:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:03:53,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:03:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:03:53,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:03:54,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472394936] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:54,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:03:54,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-20 21:03:54,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197531856] [2022-07-20 21:03:54,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:54,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:03:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:03:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:03:54,299 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:03:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:03:54,458 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2022-07-20 21:03:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:03:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-20 21:03:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:03:54,464 INFO L225 Difference]: With dead ends: 73 [2022-07-20 21:03:54,465 INFO L226 Difference]: Without dead ends: 69 [2022-07-20 21:03:54,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:03:54,466 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:03:54,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 478 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:03:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-20 21:03:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-07-20 21:03:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-20 21:03:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-07-20 21:03:54,497 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2022-07-20 21:03:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:03:54,500 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-07-20 21:03:54,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:03:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-07-20 21:03:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:03:54,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:03:54,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:03:54,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:03:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:54,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:03:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:03:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2022-07-20 21:03:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:03:54,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848671634] [2022-07-20 21:03:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:03:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:54,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:03:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:55,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:03:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:55,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:03:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:03:55,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:03:55,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848671634] [2022-07-20 21:03:55,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848671634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:03:55,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907744432] [2022-07-20 21:03:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:03:55,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:03:55,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:03:55,228 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:03:55,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:03:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:03:55,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 21:03:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:03:55,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-20 21:03:55,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-20 21:03:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:03:56,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:03:56,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-07-20 21:03:56,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-20 21:03:56,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-20 21:03:56,536 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-20 21:03:56,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-20 21:03:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:03:56,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907744432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:03:56,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:03:56,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 45 [2022-07-20 21:03:56,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429451814] [2022-07-20 21:03:56,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:03:56,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 21:03:56,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:03:56,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 21:03:56,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1701, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:03:56,711 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:04:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:04:02,345 INFO L93 Difference]: Finished difference Result 274 states and 426 transitions. [2022-07-20 21:04:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-20 21:04:02,346 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-07-20 21:04:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:04:02,349 INFO L225 Difference]: With dead ends: 274 [2022-07-20 21:04:02,349 INFO L226 Difference]: Without dead ends: 225 [2022-07-20 21:04:02,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1967, Invalid=10240, Unknown=3, NotChecked=0, Total=12210 [2022-07-20 21:04:02,356 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 278 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:04:02,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 341 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 943 Invalid, 0 Unknown, 362 Unchecked, 0.7s Time] [2022-07-20 21:04:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-07-20 21:04:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2022-07-20 21:04:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 139 states have (on average 1.330935251798561) internal successors, (185), 143 states have internal predecessors, (185), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (54), 13 states have call predecessors, (54), 13 states have call successors, (54) [2022-07-20 21:04:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 252 transitions. [2022-07-20 21:04:02,382 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 252 transitions. Word has length 48 [2022-07-20 21:04:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:04:02,383 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 252 transitions. [2022-07-20 21:04:02,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 42 states have internal predecessors, (101), 7 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-20 21:04:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 252 transitions. [2022-07-20 21:04:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:04:02,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:04:02,385 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:04:02,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:04:02,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:02,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:04:02,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:04:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 296963572, now seen corresponding path program 2 times [2022-07-20 21:04:02,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:04:02,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955213387] [2022-07-20 21:04:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:04:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:04:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:04:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:04:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:04:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:04:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 21:04:02,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:04:02,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955213387] [2022-07-20 21:04:02,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955213387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:04:02,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202786232] [2022-07-20 21:04:02,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:04:02,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:04:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:04:02,925 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) [2022-07-20 21:04:02,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:04:02,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:04:02,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:04:02,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 21:04:03,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:04:03,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-07-20 21:04:03,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-20 21:04:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:04:08,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:04:08,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-20 21:04:08,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-20 21:04:08,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-07-20 21:04:10,717 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-20 21:04:10,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-20 21:04:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:04:10,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202786232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:04:10,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:04:10,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 18] total 44 [2022-07-20 21:04:10,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133957648] [2022-07-20 21:04:10,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:04:10,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 21:04:10,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:04:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 21:04:10,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1650, Unknown=3, NotChecked=0, Total=1892 [2022-07-20 21:04:10,893 INFO L87 Difference]: Start difference. First operand 161 states and 252 transitions. Second operand has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:05:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:15,950 INFO L93 Difference]: Finished difference Result 613 states and 960 transitions. [2022-07-20 21:05:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-20 21:05:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 48 [2022-07-20 21:05:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:15,955 INFO L225 Difference]: With dead ends: 613 [2022-07-20 21:05:15,955 INFO L226 Difference]: Without dead ends: 475 [2022-07-20 21:05:15,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6698 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=2657, Invalid=15950, Unknown=25, NotChecked=0, Total=18632 [2022-07-20 21:05:15,961 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 386 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:15,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 433 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1170 Invalid, 0 Unknown, 707 Unchecked, 1.0s Time] [2022-07-20 21:05:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-07-20 21:05:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2022-07-20 21:05:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 252 states have internal predecessors, (327), 21 states have call successors, (21), 6 states have call predecessors, (21), 16 states have return successors, (119), 21 states have call predecessors, (119), 21 states have call successors, (119) [2022-07-20 21:05:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 467 transitions. [2022-07-20 21:05:16,010 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 467 transitions. Word has length 48 [2022-07-20 21:05:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:16,011 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 467 transitions. [2022-07-20 21:05:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.717948717948718) internal successors, (106), 40 states have internal predecessors, (106), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-20 21:05:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 467 transitions. [2022-07-20 21:05:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:05:16,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:16,015 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:16,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:16,228 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 3 times [2022-07-20 21:05:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994571631] [2022-07-20 21:05:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:16,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:16,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:16,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:05:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:16,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:05:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 21:05:16,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:16,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994571631] [2022-07-20 21:05:16,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994571631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:16,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35190914] [2022-07-20 21:05:16,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:05:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:16,544 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) [2022-07-20 21:05:16,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:05:16,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 21:05:16,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:05:16,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:16,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-07-20 21:05:17,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-07-20 21:05:17,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-07-20 21:05:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 21:05:17,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:17,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35190914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:17,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:05:17,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2022-07-20 21:05:17,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617483268] [2022-07-20 21:05:17,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 21:05:17,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 21:05:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:05:17,728 INFO L87 Difference]: Start difference. First operand 280 states and 467 transitions. Second operand has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:05:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:18,930 INFO L93 Difference]: Finished difference Result 665 states and 1063 transitions. [2022-07-20 21:05:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 21:05:18,931 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-07-20 21:05:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:18,937 INFO L225 Difference]: With dead ends: 665 [2022-07-20 21:05:18,937 INFO L226 Difference]: Without dead ends: 407 [2022-07-20 21:05:18,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=418, Invalid=3122, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 21:05:18,940 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 692 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:18,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 366 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 496 Invalid, 0 Unknown, 692 Unchecked, 0.4s Time] [2022-07-20 21:05:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-20 21:05:19,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 344. [2022-07-20 21:05:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 298 states have (on average 1.3389261744966443) internal successors, (399), 308 states have internal predecessors, (399), 26 states have call successors, (26), 9 states have call predecessors, (26), 19 states have return successors, (158), 26 states have call predecessors, (158), 26 states have call successors, (158) [2022-07-20 21:05:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 583 transitions. [2022-07-20 21:05:19,015 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 583 transitions. Word has length 48 [2022-07-20 21:05:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:19,016 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 583 transitions. [2022-07-20 21:05:19,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 21:05:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 583 transitions. [2022-07-20 21:05:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:05:19,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:19,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:19,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:19,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:19,228 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 4 times [2022-07-20 21:05:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:19,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028780039] [2022-07-20 21:05:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:19,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:05:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:19,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:05:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 21:05:19,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:19,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028780039] [2022-07-20 21:05:19,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028780039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767657300] [2022-07-20 21:05:19,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:05:19,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:19,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:19,504 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) [2022-07-20 21:05:19,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:05:19,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:05:19,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:05:19,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:05:19,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 21:05:20,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767657300] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:05:20,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:05:20,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-20 21:05:20,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978921243] [2022-07-20 21:05:20,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:20,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:05:20,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:05:20,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:05:20,180 INFO L87 Difference]: Start difference. First operand 344 states and 583 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:05:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:20,373 INFO L93 Difference]: Finished difference Result 578 states and 1173 transitions. [2022-07-20 21:05:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:05:20,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-20 21:05:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:20,381 INFO L225 Difference]: With dead ends: 578 [2022-07-20 21:05:20,381 INFO L226 Difference]: Without dead ends: 574 [2022-07-20 21:05:20,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:05:20,384 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:20,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 606 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:05:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-07-20 21:05:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 446. [2022-07-20 21:05:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 388 states have (on average 1.3685567010309279) internal successors, (531), 403 states have internal predecessors, (531), 33 states have call successors, (33), 9 states have call predecessors, (33), 24 states have return successors, (259), 33 states have call predecessors, (259), 33 states have call successors, (259) [2022-07-20 21:05:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 823 transitions. [2022-07-20 21:05:20,476 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 823 transitions. Word has length 48 [2022-07-20 21:05:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:20,478 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 823 transitions. [2022-07-20 21:05:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:05:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 823 transitions. [2022-07-20 21:05:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:05:20,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:20,484 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:20,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:20,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 21:05:20,708 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 5 times [2022-07-20 21:05:20,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323965696] [2022-07-20 21:05:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:21,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:21,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:05:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:21,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:05:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 21:05:21,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323965696] [2022-07-20 21:05:21,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323965696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120159210] [2022-07-20 21:05:21,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:05:21,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:21,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:21,293 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) [2022-07-20 21:05:21,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:05:21,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 21:05:21,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:21,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 21:05:21,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:21,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:21,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-07-20 21:05:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:21,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:21,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:05:21,649 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-07-20 21:05:21,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-07-20 21:05:21,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:21,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:21,754 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-07-20 21:05:21,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2022-07-20 21:05:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 21:05:21,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:23,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120159210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:23,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:05:23,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 34 [2022-07-20 21:05:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110292750] [2022-07-20 21:05:23,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 21:05:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 21:05:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1438, Unknown=2, NotChecked=0, Total=1640 [2022-07-20 21:05:23,604 INFO L87 Difference]: Start difference. First operand 446 states and 823 transitions. Second operand has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:05:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:25,597 INFO L93 Difference]: Finished difference Result 972 states and 1642 transitions. [2022-07-20 21:05:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 21:05:25,598 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-20 21:05:25,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:25,604 INFO L225 Difference]: With dead ends: 972 [2022-07-20 21:05:25,605 INFO L226 Difference]: Without dead ends: 673 [2022-07-20 21:05:25,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=842, Invalid=6128, Unknown=2, NotChecked=0, Total=6972 [2022-07-20 21:05:25,610 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 225 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:25,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 360 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 722 Invalid, 0 Unknown, 305 Unchecked, 0.6s Time] [2022-07-20 21:05:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-07-20 21:05:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 470. [2022-07-20 21:05:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 413 states have (on average 1.3438256658595642) internal successors, (555), 424 states have internal predecessors, (555), 32 states have call successors, (32), 15 states have call predecessors, (32), 24 states have return successors, (186), 30 states have call predecessors, (186), 32 states have call successors, (186) [2022-07-20 21:05:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 773 transitions. [2022-07-20 21:05:25,680 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 773 transitions. Word has length 48 [2022-07-20 21:05:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:25,680 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 773 transitions. [2022-07-20 21:05:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:05:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 773 transitions. [2022-07-20 21:05:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:05:25,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:25,683 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:25,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:25,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:05:25,900 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash -779053714, now seen corresponding path program 6 times [2022-07-20 21:05:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466642871] [2022-07-20 21:05:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:25,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:26,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:26,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:05:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:26,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:05:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 21:05:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:26,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466642871] [2022-07-20 21:05:26,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466642871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:26,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070940031] [2022-07-20 21:05:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:05:26,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:26,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:26,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:05:26,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:05:26,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:05:26,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:26,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:05:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:26,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:26,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-07-20 21:05:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:26,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-07-20 21:05:27,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:05:27,047 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-07-20 21:05:27,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2022-07-20 21:05:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:05:27,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:28,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070940031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:28,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:05:28,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-07-20 21:05:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634860761] [2022-07-20 21:05:28,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:05:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:05:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1527, Unknown=1, NotChecked=0, Total=1722 [2022-07-20 21:05:28,109 INFO L87 Difference]: Start difference. First operand 470 states and 773 transitions. Second operand has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:05:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:30,901 INFO L93 Difference]: Finished difference Result 1182 states and 1849 transitions. [2022-07-20 21:05:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-20 21:05:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-07-20 21:05:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:30,908 INFO L225 Difference]: With dead ends: 1182 [2022-07-20 21:05:30,908 INFO L226 Difference]: Without dead ends: 984 [2022-07-20 21:05:30,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1290, Invalid=12281, Unknown=1, NotChecked=0, Total=13572 [2022-07-20 21:05:30,915 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 172 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:30,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 548 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 861 Invalid, 0 Unknown, 975 Unchecked, 0.6s Time] [2022-07-20 21:05:30,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-07-20 21:05:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 735. [2022-07-20 21:05:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 649 states have (on average 1.3343605546995378) internal successors, (866), 671 states have internal predecessors, (866), 43 states have call successors, (43), 21 states have call predecessors, (43), 42 states have return successors, (255), 42 states have call predecessors, (255), 43 states have call successors, (255) [2022-07-20 21:05:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1164 transitions. [2022-07-20 21:05:31,013 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1164 transitions. Word has length 48 [2022-07-20 21:05:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:31,013 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1164 transitions. [2022-07-20 21:05:31,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.242424242424242) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 21:05:31,014 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1164 transitions. [2022-07-20 21:05:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:05:31,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:31,017 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:31,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:31,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:05:31,235 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash -299993678, now seen corresponding path program 1 times [2022-07-20 21:05:31,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:31,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100612926] [2022-07-20 21:05:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:31,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:31,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:05:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:31,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:05:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:05:31,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:31,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100612926] [2022-07-20 21:05:31,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100612926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:31,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479507187] [2022-07-20 21:05:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:31,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:31,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:31,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:05:31,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:05:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:05:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:05:31,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 21:05:32,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479507187] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:05:32,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:05:32,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2022-07-20 21:05:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830662369] [2022-07-20 21:05:32,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:32,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:05:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:32,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:05:32,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:05:32,292 INFO L87 Difference]: Start difference. First operand 735 states and 1164 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:05:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:32,517 INFO L93 Difference]: Finished difference Result 1018 states and 1838 transitions. [2022-07-20 21:05:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:05:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-20 21:05:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:32,526 INFO L225 Difference]: With dead ends: 1018 [2022-07-20 21:05:32,526 INFO L226 Difference]: Without dead ends: 1014 [2022-07-20 21:05:32,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:05:32,529 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:32,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 615 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:05:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-07-20 21:05:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 889. [2022-07-20 21:05:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 788 states have (on average 1.3565989847715736) internal successors, (1069), 819 states have internal predecessors, (1069), 50 states have call successors, (50), 21 states have call predecessors, (50), 50 states have return successors, (341), 48 states have call predecessors, (341), 50 states have call successors, (341) [2022-07-20 21:05:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1460 transitions. [2022-07-20 21:05:32,655 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1460 transitions. Word has length 48 [2022-07-20 21:05:32,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:32,655 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1460 transitions. [2022-07-20 21:05:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:05:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1460 transitions. [2022-07-20 21:05:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:05:32,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:32,660 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:32,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:32,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 21:05:32,887 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:32,888 INFO L85 PathProgramCache]: Analyzing trace with hash 485005286, now seen corresponding path program 3 times [2022-07-20 21:05:32,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:32,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370687589] [2022-07-20 21:05:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:32,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:32,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:32,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-20 21:05:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-20 21:05:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:05:32,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370687589] [2022-07-20 21:05:32,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370687589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494355636] [2022-07-20 21:05:32,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:05:32,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:32,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:32,970 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:05:32,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:05:33,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 21:05:33,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:33,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 21:05:33,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 21:05:33,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 21:05:33,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494355636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:05:33,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:05:33,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2022-07-20 21:05:33,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006811141] [2022-07-20 21:05:33,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:33,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:05:33,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:05:33,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:05:33,192 INFO L87 Difference]: Start difference. First operand 889 states and 1460 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:05:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:33,462 INFO L93 Difference]: Finished difference Result 1163 states and 1857 transitions. [2022-07-20 21:05:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:05:33,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-07-20 21:05:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:33,466 INFO L225 Difference]: With dead ends: 1163 [2022-07-20 21:05:33,466 INFO L226 Difference]: Without dead ends: 378 [2022-07-20 21:05:33,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:05:33,471 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:33,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 214 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:05:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-20 21:05:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 260. [2022-07-20 21:05:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 229 states have (on average 1.3537117903930131) internal successors, (310), 240 states have internal predecessors, (310), 16 states have call successors, (16), 4 states have call predecessors, (16), 14 states have return successors, (84), 15 states have call predecessors, (84), 16 states have call successors, (84) [2022-07-20 21:05:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 410 transitions. [2022-07-20 21:05:33,512 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 410 transitions. Word has length 51 [2022-07-20 21:05:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:33,512 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 410 transitions. [2022-07-20 21:05:33,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 21:05:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 410 transitions. [2022-07-20 21:05:33,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:05:33,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:33,514 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:33,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:33,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:05:33,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:33,739 INFO L85 PathProgramCache]: Analyzing trace with hash 820316862, now seen corresponding path program 4 times [2022-07-20 21:05:33,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:33,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049449520] [2022-07-20 21:05:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:33,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:33,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:05:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:34,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:05:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-20 21:05:34,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:34,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049449520] [2022-07-20 21:05:34,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049449520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:34,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826177850] [2022-07-20 21:05:34,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:05:34,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:34,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:34,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:05:34,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:05:34,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:05:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 21:05:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-20 21:05:34,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-20 21:05:34,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826177850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:05:34,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:05:34,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-07-20 21:05:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329316234] [2022-07-20 21:05:34,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:34,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:05:34,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:05:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:05:34,847 INFO L87 Difference]: Start difference. First operand 260 states and 410 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:05:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:35,045 INFO L93 Difference]: Finished difference Result 376 states and 668 transitions. [2022-07-20 21:05:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:05:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2022-07-20 21:05:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:35,048 INFO L225 Difference]: With dead ends: 376 [2022-07-20 21:05:35,048 INFO L226 Difference]: Without dead ends: 372 [2022-07-20 21:05:35,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:05:35,049 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:35,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 702 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:05:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-07-20 21:05:35,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 300. [2022-07-20 21:05:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 265 states have (on average 1.369811320754717) internal successors, (363), 278 states have internal predecessors, (363), 18 states have call successors, (18), 4 states have call predecessors, (18), 16 states have return successors, (115), 17 states have call predecessors, (115), 18 states have call successors, (115) [2022-07-20 21:05:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 496 transitions. [2022-07-20 21:05:35,102 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 496 transitions. Word has length 59 [2022-07-20 21:05:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:35,102 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 496 transitions. [2022-07-20 21:05:35,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 21:05:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 496 transitions. [2022-07-20 21:05:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:05:35,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:35,105 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:35,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:05:35,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:05:35,328 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1500375232, now seen corresponding path program 7 times [2022-07-20 21:05:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:35,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563023006] [2022-07-20 21:05:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:35,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:35,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:35,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:05:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:35,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:05:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 37 proven. 94 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 21:05:35,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563023006] [2022-07-20 21:05:35,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563023006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:35,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932994949] [2022-07-20 21:05:35,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:05:35,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:35,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:35,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:05:35,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:05:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 21:05:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:36,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-20 21:05:36,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-20 21:05:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 21:05:36,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:36,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-07-20 21:05:36,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-20 21:05:36,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-20 21:05:37,052 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-20 21:05:37,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-20 21:05:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-20 21:05:37,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932994949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:05:37,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:05:37,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 19] total 47 [2022-07-20 21:05:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423907597] [2022-07-20 21:05:37,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:37,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:05:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:05:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:05:37,213 INFO L87 Difference]: Start difference. First operand 300 states and 496 transitions. Second operand has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-20 21:05:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:05:42,117 INFO L93 Difference]: Finished difference Result 1230 states and 2018 transitions. [2022-07-20 21:05:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-07-20 21:05:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 59 [2022-07-20 21:05:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:05:42,124 INFO L225 Difference]: With dead ends: 1230 [2022-07-20 21:05:42,124 INFO L226 Difference]: Without dead ends: 996 [2022-07-20 21:05:42,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7169 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2262, Invalid=18908, Unknown=0, NotChecked=0, Total=21170 [2022-07-20 21:05:42,130 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 362 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:05:42,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 613 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1612 Invalid, 0 Unknown, 447 Unchecked, 1.2s Time] [2022-07-20 21:05:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-07-20 21:05:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 652. [2022-07-20 21:05:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 585 states have (on average 1.3846153846153846) internal successors, (810), 613 states have internal predecessors, (810), 28 states have call successors, (28), 11 states have call predecessors, (28), 38 states have return successors, (262), 27 states have call predecessors, (262), 28 states have call successors, (262) [2022-07-20 21:05:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1100 transitions. [2022-07-20 21:05:42,268 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1100 transitions. Word has length 59 [2022-07-20 21:05:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:05:42,268 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 1100 transitions. [2022-07-20 21:05:42,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.488372093023256) internal successors, (107), 44 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-20 21:05:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1100 transitions. [2022-07-20 21:05:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:05:42,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:05:42,277 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:05:42,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-20 21:05:42,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:42,491 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:05:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:05:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1078482300, now seen corresponding path program 8 times [2022-07-20 21:05:42,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:05:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610219086] [2022-07-20 21:05:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:05:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:05:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:42,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-20 21:05:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:42,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-20 21:05:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-20 21:05:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:05:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 49 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 21:05:43,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:05:43,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610219086] [2022-07-20 21:05:43,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610219086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:05:43,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206343756] [2022-07-20 21:05:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:05:43,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:05:43,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:05:43,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:05:43,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:05:43,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:05:43,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:05:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 21:05:43,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:05:43,578 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:05:43,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-20 21:05:43,622 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 21:05:43,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2022-07-20 21:05:43,692 INFO L356 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2022-07-20 21:05:43,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2022-07-20 21:05:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:05:51,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:05:55,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-07-20 21:05:55,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-07-20 21:05:55,360 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:05:55,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2022-07-20 21:05:55,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2022-07-20 21:05:55,386 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:05:55,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 58 [2022-07-20 21:05:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 141 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:05:55,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206343756] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:05:55,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:05:55,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 23] total 62 [2022-07-20 21:05:55,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970157238] [2022-07-20 21:05:55,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:05:55,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 21:05:55,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:05:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 21:05:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3394, Unknown=6, NotChecked=0, Total=3782 [2022-07-20 21:05:55,731 INFO L87 Difference]: Start difference. First operand 652 states and 1100 transitions. Second operand has 62 states, 59 states have (on average 2.305084745762712) internal successors, (136), 59 states have internal predecessors, (136), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9)