./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array24_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/array-patterns/array24_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:41:53,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:41:53,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:41:53,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:41:53,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:41:53,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:41:53,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:41:53,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:41:53,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:41:53,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:41:53,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:41:53,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:41:53,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:41:53,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:41:53,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:41:53,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:41:53,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:41:53,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:41:53,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:41:53,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:41:53,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:41:53,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:41:53,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:41:53,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:41:53,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:41:53,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:41:53,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:41:53,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:41:53,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:41:53,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:41:53,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:41:53,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:41:53,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:41:53,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:41:53,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:41:53,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:41:53,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:41:53,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:41:53,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:41:53,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:41:53,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:41:53,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:41:53,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:41:53,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:41:53,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:41:53,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:41:53,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:41:53,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:41:53,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:41:53,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:41:53,193 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:41:53,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:41:53,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:41:53,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:41:53,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:41:53,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:41:53,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:41:53,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:41:53,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:41:53,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:41:53,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:41:53,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:41:53,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:41:53,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:41:53,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:41:53,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:41:53,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:41:53,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:41:53,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:41:53,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:41:53,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:41:53,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:41:53,198 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:41:53,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:41:53,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:41:53,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 [2021-12-27 21:41:53,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:41:53,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:41:53,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:41:53,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:41:53,537 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:41:53,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array24_pattern.c [2021-12-27 21:41:53,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f20cbe1e/b850c9a3a9cb451992a3eed4c900d321/FLAG36dbe516e [2021-12-27 21:41:53,977 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:41:53,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2021-12-27 21:41:53,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f20cbe1e/b850c9a3a9cb451992a3eed4c900d321/FLAG36dbe516e [2021-12-27 21:41:54,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f20cbe1e/b850c9a3a9cb451992a3eed4c900d321 [2021-12-27 21:41:54,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:41:54,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:41:54,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:41:54,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:41:54,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:41:54,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@136f39ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54, skipping insertion in model container [2021-12-27 21:41:54,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:41:54,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:41:54,530 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/array-patterns/array24_pattern.c[1359,1372] [2021-12-27 21:41:54,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:41:54,556 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:41:54,571 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/array-patterns/array24_pattern.c[1359,1372] [2021-12-27 21:41:54,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:41:54,592 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:41:54,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54 WrapperNode [2021-12-27 21:41:54,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:41:54,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:41:54,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:41:54,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:41:54,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,658 INFO L137 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-12-27 21:41:54,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:41:54,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:41:54,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:41:54,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:41:54,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:41:54,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:41:54,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:41:54,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:41:54,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (1/1) ... [2021-12-27 21:41:54,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:41:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:41:54,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 21:41:54,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 21:41:54,781 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-12-27 21:41:54,781 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-12-27 21:41:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:41:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-27 21:41:54,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-27 21:41:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:41:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:41:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:41:54,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:41:54,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:41:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:41:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:41:54,863 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:41:54,865 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:41:55,108 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:41:55,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:41:55,115 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-27 21:41:55,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:41:55 BoogieIcfgContainer [2021-12-27 21:41:55,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:41:55,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:41:55,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:41:55,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:41:55,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:41:54" (1/3) ... [2021-12-27 21:41:55,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e8e9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:41:55, skipping insertion in model container [2021-12-27 21:41:55,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:41:54" (2/3) ... [2021-12-27 21:41:55,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53e8e9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:41:55, skipping insertion in model container [2021-12-27 21:41:55,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:41:55" (3/3) ... [2021-12-27 21:41:55,129 INFO L111 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2021-12-27 21:41:55,134 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:41:55,134 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:41:55,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:41:55,173 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 21:41:55,173 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:41:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:41:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-27 21:41:55,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:41:55,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:41:55,193 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:41:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:41:55,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2021-12-27 21:41:55,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:41:55,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266705874] [2021-12-27 21:41:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:55,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:41:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:41:55,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 21:41:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:41:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:41:55,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:41:55,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266705874] [2021-12-27 21:41:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266705874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:41:55,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:41:55,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:41:55,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415433648] [2021-12-27 21:41:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:41:55,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:41:55,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:41:55,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:41:55,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:41:55,387 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:41:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:41:55,410 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2021-12-27 21:41:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:41:55,412 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-27 21:41:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:41:55,431 INFO L225 Difference]: With dead ends: 77 [2021-12-27 21:41:55,431 INFO L226 Difference]: Without dead ends: 36 [2021-12-27 21:41:55,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:41:55,439 INFO L933 BasicCegarLoop]: 50 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, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:41:55,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:41:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-27 21:41:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-27 21:41:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:41:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-12-27 21:41:55,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2021-12-27 21:41:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:41:55,481 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-12-27 21:41:55,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-27 21:41:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-12-27 21:41:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-27 21:41:55,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:41:55,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:41:55,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:41:55,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:41:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:41:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2021-12-27 21:41:55,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:41:55,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417971004] [2021-12-27 21:41:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:55,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:41:55,530 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:41:55,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238569764] [2021-12-27 21:41:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:55,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:55,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:41:55,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:41:55,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:41:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:41:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 21:41:55,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:41:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:41:55,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:41:55,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:41:55,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417971004] [2021-12-27 21:41:55,837 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:41:55,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238569764] [2021-12-27 21:41:55,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238569764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:41:55,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:41:55,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-27 21:41:55,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210056816] [2021-12-27 21:41:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:41:55,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-27 21:41:55,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:41:55,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-27 21:41:55,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:41:55,841 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:41:56,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:41:56,013 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-27 21:41:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-27 21:41:56,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-27 21:41:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:41:56,017 INFO L225 Difference]: With dead ends: 76 [2021-12-27 21:41:56,017 INFO L226 Difference]: Without dead ends: 48 [2021-12-27 21:41:56,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-27 21:41:56,019 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 49 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:41:56,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:41:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-27 21:41:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-12-27 21:41:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:41:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-12-27 21:41:56,031 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 35 [2021-12-27 21:41:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:41:56,032 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-12-27 21:41:56,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:41:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-12-27 21:41:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-27 21:41:56,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:41:56,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:41:56,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:41:56,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:56,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:41:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:41:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1308831759, now seen corresponding path program 1 times [2021-12-27 21:41:56,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:41:56,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385477422] [2021-12-27 21:41:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:56,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:41:56,265 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:41:56,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238733254] [2021-12-27 21:41:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:56,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:41:56,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:41:56,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:41:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:41:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:41:56,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:41:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:41:56,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:41:56,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:41:56,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385477422] [2021-12-27 21:41:56,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:41:56,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238733254] [2021-12-27 21:41:56,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238733254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:41:56,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:41:56,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:41:56,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106469038] [2021-12-27 21:41:56,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:41:56,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:41:56,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:41:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:41:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:41:56,454 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:41:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:41:56,507 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-12-27 21:41:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:41:56,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-12-27 21:41:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:41:56,508 INFO L225 Difference]: With dead ends: 79 [2021-12-27 21:41:56,508 INFO L226 Difference]: Without dead ends: 46 [2021-12-27 21:41:56,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:41:56,510 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:41:56,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:41:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-27 21:41:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-12-27 21:41:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:41:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-12-27 21:41:56,517 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 41 [2021-12-27 21:41:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:41:56,517 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-12-27 21:41:56,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:41:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-12-27 21:41:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-27 21:41:56,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:41:56,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:41:56,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:41:56,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-27 21:41:56,740 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:41:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:41:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1300942485, now seen corresponding path program 1 times [2021-12-27 21:41:56,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:41:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404907728] [2021-12-27 21:41:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:56,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:41:56,759 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:41:56,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548728682] [2021-12-27 21:41:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:56,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:56,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:41:56,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:41:56,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:41:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:41:56,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-27 21:41:56,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:41:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-27 21:41:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:41:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-27 21:41:57,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:41:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404907728] [2021-12-27 21:41:57,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:41:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548728682] [2021-12-27 21:41:57,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548728682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:41:57,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:41:57,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-12-27 21:41:57,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361517200] [2021-12-27 21:41:57,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:41:57,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-27 21:41:57,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:41:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-27 21:41:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-27 21:41:57,161 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-27 21:41:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:41:57,377 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-12-27 21:41:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-27 21:41:57,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2021-12-27 21:41:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:41:57,379 INFO L225 Difference]: With dead ends: 85 [2021-12-27 21:41:57,379 INFO L226 Difference]: Without dead ends: 50 [2021-12-27 21:41:57,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:41:57,380 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:41:57,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 151 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:41:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-27 21:41:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-27 21:41:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:41:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-27 21:41:57,388 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 45 [2021-12-27 21:41:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:41:57,388 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-27 21:41:57,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-27 21:41:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-27 21:41:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-27 21:41:57,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:41:57,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:41:57,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:41:57,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:57,606 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:41:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:41:57,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1544610617, now seen corresponding path program 2 times [2021-12-27 21:41:57,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:41:57,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688066744] [2021-12-27 21:41:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:57,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:41:57,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:41:57,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390088379] [2021-12-27 21:41:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:41:57,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:41:57,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:41:57,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:41:57,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:41:57,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:41:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:41:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:41:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:41:57,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:41:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-27 21:41:57,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:41:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688066744] [2021-12-27 21:41:57,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:41:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390088379] [2021-12-27 21:41:57,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390088379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:41:57,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:41:57,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-27 21:41:57,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662179882] [2021-12-27 21:41:57,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:41:57,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-27 21:41:57,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:41:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-27 21:41:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-27 21:41:57,960 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:41:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:41:58,160 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2021-12-27 21:41:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 21:41:58,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2021-12-27 21:41:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:41:58,162 INFO L225 Difference]: With dead ends: 106 [2021-12-27 21:41:58,162 INFO L226 Difference]: Without dead ends: 74 [2021-12-27 21:41:58,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:41:58,163 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:41:58,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 198 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:41:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-27 21:41:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-12-27 21:41:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 21:41:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-27 21:41:58,172 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2021-12-27 21:41:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:41:58,173 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-27 21:41:58,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:41:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-27 21:41:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-27 21:41:58,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:41:58,175 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:41:58,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:41:58,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:58,383 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:41:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:41:58,384 INFO L85 PathProgramCache]: Analyzing trace with hash -725408594, now seen corresponding path program 3 times [2021-12-27 21:41:58,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:41:58,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494076034] [2021-12-27 21:41:58,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:41:58,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:41:58,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:41:58,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564962059] [2021-12-27 21:41:58,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:41:58,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:41:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:41:58,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:41:58,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:41:58,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-27 21:41:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:41:58,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-27 21:41:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:41:59,136 INFO L387 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 0 case distinctions, treesize of input 61 treesize of output 56 [2021-12-27 21:41:59,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2021-12-27 21:41:59,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-27 21:41:59,268 INFO L387 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 0 case distinctions, treesize of input 72 treesize of output 65 [2021-12-27 21:41:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-27 21:41:59,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 86 [2021-12-27 21:41:59,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2021-12-27 21:41:59,483 INFO L387 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 0 case distinctions, treesize of input 77 treesize of output 68 [2021-12-27 21:41:59,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,518 INFO L353 Elim1Store]: treesize reduction 76, result has 12.6 percent of original size [2021-12-27 21:41:59,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 89 [2021-12-27 21:41:59,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-27 21:41:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,573 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-12-27 21:41:59,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 23 [2021-12-27 21:41:59,708 INFO L387 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 0 case distinctions, treesize of input 92 treesize of output 81 [2021-12-27 21:41:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,781 INFO L353 Elim1Store]: treesize reduction 304, result has 14.4 percent of original size [2021-12-27 21:41:59,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 118 [2021-12-27 21:41:59,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:41:59,812 INFO L353 Elim1Store]: treesize reduction 89, result has 1.1 percent of original size [2021-12-27 21:41:59,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 28 [2021-12-27 21:42:01,882 INFO L387 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 0 case distinctions, treesize of input 140 treesize of output 123 [2021-12-27 21:42:01,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:01,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:02,113 INFO L353 Elim1Store]: treesize reduction 515, result has 26.3 percent of original size [2021-12-27 21:42:02,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 122 treesize of output 254 [2021-12-27 21:42:03,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:03,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:03,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:03,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:03,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:04,043 INFO L353 Elim1Store]: treesize reduction 133, result has 43.4 percent of original size [2021-12-27 21:42:04,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 201 treesize of output 230 [2021-12-27 21:42:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:05,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-27 21:42:05,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 121 [2021-12-27 21:42:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:42:06,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:13,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494076034] [2021-12-27 21:42:13,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564962059] [2021-12-27 21:42:13,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564962059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:42:13,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-27 21:42:13,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-12-27 21:42:13,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973599621] [2021-12-27 21:42:13,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:13,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-27 21:42:13,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:13,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-27 21:42:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1830, Unknown=1, NotChecked=0, Total=2256 [2021-12-27 21:42:13,074 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:42:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:14,047 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-12-27 21:42:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-27 21:42:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2021-12-27 21:42:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:14,049 INFO L225 Difference]: With dead ends: 112 [2021-12-27 21:42:14,050 INFO L226 Difference]: Without dead ends: 108 [2021-12-27 21:42:14,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=590, Invalid=2715, Unknown=1, NotChecked=0, Total=3306 [2021-12-27 21:42:14,052 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:14,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 351 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 178 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2021-12-27 21:42:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-27 21:42:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2021-12-27 21:42:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.211111111111111) internal successors, (109), 90 states have internal predecessors, (109), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-27 21:42:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2021-12-27 21:42:14,067 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 63 [2021-12-27 21:42:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:14,068 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2021-12-27 21:42:14,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:42:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2021-12-27 21:42:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-27 21:42:14,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:14,070 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:14,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:14,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:14,272 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash -506553876, now seen corresponding path program 1 times [2021-12-27 21:42:14,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:14,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388750058] [2021-12-27 21:42:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:14,288 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:14,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109090386] [2021-12-27 21:42:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:14,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:14,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:14,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:42:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-27 21:42:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-27 21:42:14,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:14,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:14,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388750058] [2021-12-27 21:42:14,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:14,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109090386] [2021-12-27 21:42:14,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109090386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:14,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:14,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:42:14,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858157285] [2021-12-27 21:42:14,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:14,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:42:14,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:42:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:42:14,440 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:42:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:14,457 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2021-12-27 21:42:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:42:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-12-27 21:42:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:14,458 INFO L225 Difference]: With dead ends: 145 [2021-12-27 21:42:14,459 INFO L226 Difference]: Without dead ends: 106 [2021-12-27 21:42:14,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:42:14,460 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:14,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 83 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-27 21:42:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-12-27 21:42:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-27 21:42:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-12-27 21:42:14,473 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 63 [2021-12-27 21:42:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:14,473 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-12-27 21:42:14,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:42:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-12-27 21:42:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-27 21:42:14,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:14,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:14,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:14,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:14,676 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 236205423, now seen corresponding path program 1 times [2021-12-27 21:42:14,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:14,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488264070] [2021-12-27 21:42:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:14,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248672331] [2021-12-27 21:42:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:14,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:14,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:14,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:42:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-27 21:42:14,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-27 21:42:14,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:14,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488264070] [2021-12-27 21:42:14,835 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:14,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248672331] [2021-12-27 21:42:14,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248672331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:14,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:14,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:42:14,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626523036] [2021-12-27 21:42:14,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:14,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:42:14,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:14,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:42:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:14,837 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:42:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:14,872 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2021-12-27 21:42:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:42:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-12-27 21:42:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:14,873 INFO L225 Difference]: With dead ends: 155 [2021-12-27 21:42:14,874 INFO L226 Difference]: Without dead ends: 115 [2021-12-27 21:42:14,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:42:14,874 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:14,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 193 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-27 21:42:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2021-12-27 21:42:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 94 states have internal predecessors, (112), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-12-27 21:42:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2021-12-27 21:42:14,888 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 63 [2021-12-27 21:42:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:14,889 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2021-12-27 21:42:14,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:42:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2021-12-27 21:42:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-27 21:42:14,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:14,890 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:14,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:15,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:15,114 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1172698608, now seen corresponding path program 4 times [2021-12-27 21:42:15,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:15,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214411555] [2021-12-27 21:42:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:15,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:15,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:15,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972955415] [2021-12-27 21:42:15,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:42:15,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:15,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:15,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:15,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:42:15,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:42:15,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:42:15,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-27 21:42:15,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-27 21:42:15,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:15,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214411555] [2021-12-27 21:42:15,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:15,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972955415] [2021-12-27 21:42:15,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972955415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:15,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:15,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-27 21:42:15,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119679926] [2021-12-27 21:42:15,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:15,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:42:15,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:42:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:42:15,442 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:42:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:15,655 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2021-12-27 21:42:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-27 21:42:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-27 21:42:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:15,658 INFO L225 Difference]: With dead ends: 247 [2021-12-27 21:42:15,658 INFO L226 Difference]: Without dead ends: 196 [2021-12-27 21:42:15,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-27 21:42:15,659 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 133 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:15,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 204 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:42:15,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-27 21:42:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-12-27 21:42:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 134 states have (on average 1.1791044776119404) internal successors, (158), 134 states have internal predecessors, (158), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 14 states have call predecessors, (17), 12 states have call successors, (17) [2021-12-27 21:42:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2021-12-27 21:42:15,676 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 65 [2021-12-27 21:42:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:15,677 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2021-12-27 21:42:15,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:42:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2021-12-27 21:42:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-27 21:42:15,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:15,679 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:15,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:15,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-27 21:42:15,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash 785313200, now seen corresponding path program 5 times [2021-12-27 21:42:15,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:15,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095206752] [2021-12-27 21:42:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:15,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:15,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:15,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543177483] [2021-12-27 21:42:15,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:42:15,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:15,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:15,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:42:16,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-27 21:42:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:42:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-27 21:42:16,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-27 21:42:16,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:16,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095206752] [2021-12-27 21:42:16,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:16,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543177483] [2021-12-27 21:42:16,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543177483] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:16,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:16,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-27 21:42:16,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245528466] [2021-12-27 21:42:16,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:16,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:42:16,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:42:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:42:16,455 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:42:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:16,666 INFO L93 Difference]: Finished difference Result 214 states and 252 transitions. [2021-12-27 21:42:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 21:42:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-27 21:42:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:16,668 INFO L225 Difference]: With dead ends: 214 [2021-12-27 21:42:16,668 INFO L226 Difference]: Without dead ends: 163 [2021-12-27 21:42:16,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:42:16,669 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:16,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 240 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:42:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-27 21:42:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2021-12-27 21:42:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 134 states have (on average 1.1567164179104477) internal successors, (155), 134 states have internal predecessors, (155), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 14 states have call predecessors, (17), 12 states have call successors, (17) [2021-12-27 21:42:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2021-12-27 21:42:16,684 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 65 [2021-12-27 21:42:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:16,684 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2021-12-27 21:42:16,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:42:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2021-12-27 21:42:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-27 21:42:16,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:16,686 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:16,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:16,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 21:42:16,891 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash -834557719, now seen corresponding path program 1 times [2021-12-27 21:42:16,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488392509] [2021-12-27 21:42:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:16,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:16,899 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393922033] [2021-12-27 21:42:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:16,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:16,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:16,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:42:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:42:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-27 21:42:17,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:42:17,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488392509] [2021-12-27 21:42:17,051 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:17,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393922033] [2021-12-27 21:42:17,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393922033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:42:17,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:42:17,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:42:17,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531813306] [2021-12-27 21:42:17,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:42:17,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:42:17,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:17,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:42:17,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:42:17,052 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-27 21:42:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:17,078 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2021-12-27 21:42:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-27 21:42:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-27 21:42:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:17,080 INFO L225 Difference]: With dead ends: 248 [2021-12-27 21:42:17,080 INFO L226 Difference]: Without dead ends: 160 [2021-12-27 21:42:17,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-27 21:42:17,081 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:17,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:42:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-27 21:42:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-12-27 21:42:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 134 states have (on average 1.1343283582089552) internal successors, (152), 134 states have internal predecessors, (152), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 14 states have call predecessors, (17), 12 states have call successors, (17) [2021-12-27 21:42:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 181 transitions. [2021-12-27 21:42:17,096 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 181 transitions. Word has length 69 [2021-12-27 21:42:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:17,096 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 181 transitions. [2021-12-27 21:42:17,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-27 21:42:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 181 transitions. [2021-12-27 21:42:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-27 21:42:17,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:17,098 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:17,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:17,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-27 21:42:17,303 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1276732650, now seen corresponding path program 1 times [2021-12-27 21:42:17,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:17,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698834492] [2021-12-27 21:42:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:17,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:17,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:17,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63236663] [2021-12-27 21:42:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:17,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:17,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:17,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:17,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-27 21:42:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-27 21:42:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-27 21:42:17,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-27 21:42:17,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698834492] [2021-12-27 21:42:17,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63236663] [2021-12-27 21:42:17,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63236663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:17,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:17,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-12-27 21:42:17,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842710412] [2021-12-27 21:42:17,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:17,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:42:17,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:42:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:42:17,836 INFO L87 Difference]: Start difference. First operand 156 states and 181 transitions. Second operand has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-27 21:42:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:18,200 INFO L93 Difference]: Finished difference Result 215 states and 242 transitions. [2021-12-27 21:42:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-27 21:42:18,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 69 [2021-12-27 21:42:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:18,202 INFO L225 Difference]: With dead ends: 215 [2021-12-27 21:42:18,202 INFO L226 Difference]: Without dead ends: 169 [2021-12-27 21:42:18,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-12-27 21:42:18,203 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:18,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 248 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:42:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-27 21:42:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2021-12-27 21:42:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 139 states have internal predecessors, (152), 13 states have call successors, (13), 9 states have call predecessors, (13), 10 states have return successors, (15), 12 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-27 21:42:18,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2021-12-27 21:42:18,221 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 69 [2021-12-27 21:42:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:18,221 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2021-12-27 21:42:18,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-27 21:42:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2021-12-27 21:42:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-27 21:42:18,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:18,223 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:18,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:18,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-27 21:42:18,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1130035513, now seen corresponding path program 6 times [2021-12-27 21:42:18,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:18,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087957552] [2021-12-27 21:42:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:18,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:18,459 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:18,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093546802] [2021-12-27 21:42:18,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-27 21:42:18,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:18,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:18,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-27 21:42:18,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-27 21:42:18,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:42:18,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:42:18,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:42:18,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:18,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087957552] [2021-12-27 21:42:18,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:18,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093546802] [2021-12-27 21:42:18,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093546802] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:18,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:18,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-12-27 21:42:18,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809257982] [2021-12-27 21:42:18,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:18,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-27 21:42:18,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:18,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-27 21:42:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:42:18,873 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:42:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:19,087 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2021-12-27 21:42:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-27 21:42:19,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2021-12-27 21:42:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:19,089 INFO L225 Difference]: With dead ends: 175 [2021-12-27 21:42:19,089 INFO L226 Difference]: Without dead ends: 77 [2021-12-27 21:42:19,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:42:19,090 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 102 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:19,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 163 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:42:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-27 21:42:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-27 21:42:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-27 21:42:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2021-12-27 21:42:19,096 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 70 [2021-12-27 21:42:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:19,096 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2021-12-27 21:42:19,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-27 21:42:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2021-12-27 21:42:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-27 21:42:19,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:19,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:19,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:19,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-27 21:42:19,320 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1478551406, now seen corresponding path program 7 times [2021-12-27 21:42:19,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:19,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813924206] [2021-12-27 21:42:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:19,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:19,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:19,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199800714] [2021-12-27 21:42:19,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-27 21:42:19,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:19,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:19,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:19,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-27 21:42:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:42:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-27 21:42:19,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-27 21:42:19,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:42:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-27 21:42:19,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:42:19,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813924206] [2021-12-27 21:42:19,715 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:42:19,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199800714] [2021-12-27 21:42:19,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199800714] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:42:19,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:42:19,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-27 21:42:19,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555040962] [2021-12-27 21:42:19,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:42:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-27 21:42:19,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:42:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-27 21:42:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-27 21:42:19,717 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:42:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:42:19,948 INFO L93 Difference]: Finished difference Result 157 states and 182 transitions. [2021-12-27 21:42:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-27 21:42:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 71 [2021-12-27 21:42:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:42:19,949 INFO L225 Difference]: With dead ends: 157 [2021-12-27 21:42:19,949 INFO L226 Difference]: Without dead ends: 109 [2021-12-27 21:42:19,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-12-27 21:42:19,950 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 53 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:42:19,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 182 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:42:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-27 21:42:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2021-12-27 21:42:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-27 21:42:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-12-27 21:42:19,956 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 71 [2021-12-27 21:42:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:42:19,956 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-12-27 21:42:19,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-27 21:42:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-12-27 21:42:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-27 21:42:19,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:42:19,957 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:42:19,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-27 21:42:20,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-27 21:42:20,179 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:42:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:42:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash 599706749, now seen corresponding path program 8 times [2021-12-27 21:42:20,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:42:20,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858791744] [2021-12-27 21:42:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:42:20,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:42:20,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:42:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256667512] [2021-12-27 21:42:20,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:42:20,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:42:20,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:42:20,193 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:42:20,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-27 21:42:21,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:42:21,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:42:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-27 21:42:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:42:21,664 INFO L387 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 0 case distinctions, treesize of input 61 treesize of output 56 [2021-12-27 21:42:21,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 20 [2021-12-27 21:42:21,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2021-12-27 21:42:21,738 INFO L387 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 0 case distinctions, treesize of input 80 treesize of output 73 [2021-12-27 21:42:21,753 INFO L353 Elim1Store]: treesize reduction 148, result has 19.1 percent of original size [2021-12-27 21:42:21,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 96 [2021-12-27 21:42:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:21,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 7 [2021-12-27 21:42:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:21,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2021-12-27 21:42:21,866 INFO L387 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 0 case distinctions, treesize of input 94 treesize of output 85 [2021-12-27 21:42:21,901 INFO L353 Elim1Store]: treesize reduction 293, result has 16.8 percent of original size [2021-12-27 21:42:21,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 123 [2021-12-27 21:42:21,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:21,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 36 [2021-12-27 21:42:22,166 INFO L387 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 0 case distinctions, treesize of input 116 treesize of output 105 [2021-12-27 21:42:22,215 INFO L353 Elim1Store]: treesize reduction 524, result has 15.9 percent of original size [2021-12-27 21:42:22,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 104 treesize of output 166 [2021-12-27 21:42:22,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-27 21:42:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 51 [2021-12-27 21:42:22,369 INFO L387 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 0 case distinctions, treesize of input 131 treesize of output 118 [2021-12-27 21:42:22,438 INFO L353 Elim1Store]: treesize reduction 730, result has 14.6 percent of original size [2021-12-27 21:42:22,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 117 treesize of output 195 [2021-12-27 21:42:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 44 [2021-12-27 21:42:22,606 INFO L387 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 0 case distinctions, treesize of input 147 treesize of output 132 [2021-12-27 21:42:22,735 INFO L353 Elim1Store]: treesize reduction 970, result has 13.6 percent of original size [2021-12-27 21:42:22,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 131 treesize of output 226 [2021-12-27 21:42:22,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-27 21:42:22,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:22,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 105 [2021-12-27 21:42:23,181 INFO L387 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 0 case distinctions, treesize of input 127 treesize of output 110 [2021-12-27 21:42:23,323 INFO L353 Elim1Store]: treesize reduction 840, result has 11.5 percent of original size [2021-12-27 21:42:23,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 109 treesize of output 185 [2021-12-27 21:42:23,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 85 [2021-12-27 21:42:23,541 INFO L387 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 0 case distinctions, treesize of input 146 treesize of output 127 [2021-12-27 21:42:23,722 INFO L353 Elim1Store]: treesize reduction 1132, result has 11.2 percent of original size [2021-12-27 21:42:23,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 126 treesize of output 222 [2021-12-27 21:42:23,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-27 21:42:23,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:23,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 34 [2021-12-27 21:42:24,003 INFO L387 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 0 case distinctions, treesize of input 144 treesize of output 123 [2021-12-27 21:42:24,229 INFO L353 Elim1Store]: treesize reduction 1153, result has 11.9 percent of original size [2021-12-27 21:42:24,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 44 case distinctions, treesize of input 122 treesize of output 227 [2021-12-27 21:42:24,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-27 21:42:24,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:42:24,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 78