./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s4lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-fpi/s4lif.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 b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:15:34,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:15:34,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:15:34,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:15:34,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:15:34,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:15:34,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:15:34,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:15:34,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:15:34,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:15:34,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:15:34,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:15:34,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:15:34,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:15:34,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:15:34,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:15:34,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:15:34,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:15:34,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:15:34,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:15:34,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:15:34,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:15:34,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:15:34,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:15:34,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:15:34,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:15:34,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:15:34,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:15:34,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:15:34,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:15:34,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:15:34,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:15:34,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:15:34,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:15:34,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:15:34,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:15:34,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:15:34,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:15:34,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:15:34,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:15:34,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:15:34,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:15:34,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:15:34,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:15:34,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:15:34,444 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:15:34,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:15:34,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:15:34,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:15:34,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:15:34,446 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:15:34,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:15:34,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:15:34,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:15:34,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:15:34,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:15:34,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:15:34,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:15:34,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:15:34,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:15:34,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:15:34,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:15:34,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:15:34,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:15:34,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:15:34,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:15:34,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:15:34,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:15:34,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:15:34,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:15:34,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:15:34,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:15:34,450 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:15:34,450 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:15:34,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:15:34,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:15:34,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a [2021-12-21 10:15:34,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:15:34,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:15:34,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:15:34,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:15:34,679 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:15:34,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4lif.c [2021-12-21 10:15:34,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1499125d6/89fcf42d15f44554827260b01890d34d/FLAGe681b3b7a [2021-12-21 10:15:35,092 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:15:35,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s4lif.c [2021-12-21 10:15:35,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1499125d6/89fcf42d15f44554827260b01890d34d/FLAGe681b3b7a [2021-12-21 10:15:35,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1499125d6/89fcf42d15f44554827260b01890d34d [2021-12-21 10:15:35,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:15:35,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:15:35,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:15:35,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:15:35,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:15:35,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@720a4af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35, skipping insertion in model container [2021-12-21 10:15:35,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:15:35,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:15:35,253 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-fpi/s4lif.c[588,601] [2021-12-21 10:15:35,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:15:35,282 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:15:35,317 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-fpi/s4lif.c[588,601] [2021-12-21 10:15:35,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:15:35,334 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:15:35,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35 WrapperNode [2021-12-21 10:15:35,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:15:35,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:15:35,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:15:35,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:15:35,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,379 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-12-21 10:15:35,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:15:35,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:15:35,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:15:35,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:15:35,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:15:35,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:15:35,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:15:35,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:15:35,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (1/1) ... [2021-12-21 10:15:35,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:15:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:35,443 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) [2021-12-21 10:15:35,460 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 [2021-12-21 10:15:35,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:15:35,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:15:35,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:15:35,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:15:35,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:15:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:15:35,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:15:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:15:35,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:15:35,521 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:15:35,522 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:15:35,640 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:15:35,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:15:35,644 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 10:15:35,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:15:35 BoogieIcfgContainer [2021-12-21 10:15:35,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:15:35,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:15:35,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:15:35,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:15:35,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:15:35" (1/3) ... [2021-12-21 10:15:35,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6ffdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:15:35, skipping insertion in model container [2021-12-21 10:15:35,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:35" (2/3) ... [2021-12-21 10:15:35,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6ffdac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:15:35, skipping insertion in model container [2021-12-21 10:15:35,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:15:35" (3/3) ... [2021-12-21 10:15:35,665 INFO L111 eAbstractionObserver]: Analyzing ICFG s4lif.c [2021-12-21 10:15:35,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:15:35,669 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:15:35,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:15:35,702 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 [2021-12-21 10:15:35,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:15:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:15:35,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:35,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:35,715 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-12-21 10:15:35,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:35,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316805116] [2021-12-21 10:15:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:35,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:35,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316805116] [2021-12-21 10:15:35,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316805116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:15:35,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:15:35,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:15:35,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711189824] [2021-12-21 10:15:35,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:15:35,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:15:35,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:15:35,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:15:35,880 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:35,892 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-21 10:15:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:15:35,893 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 10:15:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:35,897 INFO L225 Difference]: With dead ends: 40 [2021-12-21 10:15:35,897 INFO L226 Difference]: Without dead ends: 18 [2021-12-21 10:15:35,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:15:35,904 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-21 10:15:35,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:15:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-21 10:15:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-21 10:15:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-21 10:15:35,931 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-21 10:15:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:35,932 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-21 10:15:35,932 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-21 10:15:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:15:35,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:35,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:35,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:15:35,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-12-21 10:15:35,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:35,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354629099] [2021-12-21 10:15:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:35,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:36,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:36,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354629099] [2021-12-21 10:15:36,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354629099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:15:36,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:15:36,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:15:36,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765108535] [2021-12-21 10:15:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:15:36,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:15:36,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:15:36,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:15:36,018 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:36,071 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-21 10:15:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:15:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 10:15:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:36,072 INFO L225 Difference]: With dead ends: 36 [2021-12-21 10:15:36,072 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 10:15:36,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:15:36,073 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:36,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:15:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 10:15:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-21 10:15:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-21 10:15:36,099 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-21 10:15:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:36,101 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-21 10:15:36,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-21 10:15:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:15:36,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:36,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:36,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:15:36,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-12-21 10:15:36,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:36,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015780264] [2021-12-21 10:15:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:36,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:36,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:36,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015780264] [2021-12-21 10:15:36,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015780264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:36,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542390271] [2021-12-21 10:15:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:36,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:36,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:36,644 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) [2021-12-21 10:15:36,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:15:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:36,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 10:15:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:36,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:15:36,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:15:36,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:15:37,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-12-21 10:15:37,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-21 10:15:37,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 27 [2021-12-21 10:15:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:37,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:37,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:15:37,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 28 [2021-12-21 10:15:37,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:15:37,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2021-12-21 10:15:37,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:37,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-21 10:15:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:37,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542390271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:37,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:37,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 28 [2021-12-21 10:15:37,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829324479] [2021-12-21 10:15:37,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:37,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 10:15:37,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:37,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 10:15:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-12-21 10:15:37,608 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:37,909 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-12-21 10:15:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 10:15:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:15:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:37,911 INFO L225 Difference]: With dead ends: 46 [2021-12-21 10:15:37,912 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 10:15:37,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 10:15:37,915 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:37,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 181 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2021-12-21 10:15:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 10:15:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2021-12-21 10:15:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-12-21 10:15:37,927 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2021-12-21 10:15:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:37,928 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-12-21 10:15:37,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-12-21 10:15:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:15:37,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:37,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:37,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:38,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:38,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-12-21 10:15:38,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892830975] [2021-12-21 10:15:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:38,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:38,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:38,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892830975] [2021-12-21 10:15:38,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892830975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452965749] [2021-12-21 10:15:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:38,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:38,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:38,259 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) [2021-12-21 10:15:38,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:15:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 10:15:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:38,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-21 10:15:38,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 10:15:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:38,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-21 10:15:38,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-21 10:15:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:38,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452965749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:38,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:38,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-21 10:15:38,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561654225] [2021-12-21 10:15:38,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:38,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:15:38,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:15:38,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:15:38,422 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:38,474 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-21 10:15:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:15:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:15:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:38,475 INFO L225 Difference]: With dead ends: 48 [2021-12-21 10:15:38,475 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 10:15:38,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:15:38,476 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:38,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 43 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:15:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 10:15:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-21 10:15:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-21 10:15:38,480 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2021-12-21 10:15:38,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-21 10:15:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-21 10:15:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:15:38,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:38,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:38,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:38,699 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,SelfDestructingSolverStorable3 [2021-12-21 10:15:38,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-12-21 10:15:38,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:38,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767543706] [2021-12-21 10:15:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:38,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:38,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:38,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767543706] [2021-12-21 10:15:38,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767543706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:38,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547319636] [2021-12-21 10:15:38,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:15:38,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:38,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:38,755 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) [2021-12-21 10:15:38,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:15:38,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:15:38,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:15:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:15:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:38,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:38,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547319636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:38,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:38,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:15:38,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617516864] [2021-12-21 10:15:38,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:38,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:15:38,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:38,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:15:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:15:38,906 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:38,995 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-21 10:15:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:15:38,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-21 10:15:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:38,997 INFO L225 Difference]: With dead ends: 70 [2021-12-21 10:15:38,997 INFO L226 Difference]: Without dead ends: 44 [2021-12-21 10:15:38,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:15:39,001 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:39,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 29 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:15:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-21 10:15:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-12-21 10:15:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-21 10:15:39,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-12-21 10:15:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:39,008 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-21 10:15:39,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-21 10:15:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:15:39,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:39,008 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:39,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:39,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:39,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-12-21 10:15:39,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:39,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143937180] [2021-12-21 10:15:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:39,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:39,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:39,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143937180] [2021-12-21 10:15:39,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143937180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:39,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445444952] [2021-12-21 10:15:39,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:15:39,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:39,279 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) [2021-12-21 10:15:39,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:15:39,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:15:39,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:15:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:15:39,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:39,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:15:39,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445444952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:39,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:39,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:15:39,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638885349] [2021-12-21 10:15:39,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:39,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:15:39,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:15:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:15:39,450 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:39,521 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-21 10:15:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:15:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-21 10:15:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:39,524 INFO L225 Difference]: With dead ends: 39 [2021-12-21 10:15:39,524 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 10:15:39,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:15:39,526 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:39,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 24 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:15:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 10:15:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-21 10:15:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-21 10:15:39,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-12-21 10:15:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:39,533 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-21 10:15:39,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-21 10:15:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:15:39,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:39,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:39,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:39,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:39,747 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:39,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-12-21 10:15:39,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271102101] [2021-12-21 10:15:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:39,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:40,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271102101] [2021-12-21 10:15:40,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271102101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655048372] [2021-12-21 10:15:40,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:15:40,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:40,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:40,345 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) [2021-12-21 10:15:40,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:15:40,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:15:40,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:15:40,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-21 10:15:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:40,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:15:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:40,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:15:40,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:40,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:15:40,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:40,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-21 10:15:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:40,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-12-21 10:15:40,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:40,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:40,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:40,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-12-21 10:15:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:41,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-21 10:15:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:41,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 58 treesize of output 34 [2021-12-21 10:15:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:41,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:41,877 INFO L353 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-12-21 10:15:41,877 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 9 case distinctions, treesize of input 554 treesize of output 290 [2021-12-21 10:15:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:41,968 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 89 treesize of output 67 [2021-12-21 10:15:42,036 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ 5 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))) (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) (div (+ 5 .cse0 .cse1) 5)) (<= (div (+ 4 .cse0 .cse1) 5) |c_ULTIMATE.start_main_~i~0#1|)))))) (not (= (+ (- 4) (select v_arrayElimArr_3 .cse4)) 1)) (not (= 5 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2021-12-21 10:15:42,085 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= (+ (- 4) (select v_arrayElimArr_3 .cse0)) 1)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ 5 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (and (<= (div (+ 4 .cse1 .cse2) 5) (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (div (+ 5 .cse1 .cse2) 5))))))) (not (= 5 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2021-12-21 10:15:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-21 10:15:42,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655048372] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:42,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:42,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 50 [2021-12-21 10:15:42,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894382236] [2021-12-21 10:15:42,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:42,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-21 10:15:42,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-21 10:15:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1935, Unknown=2, NotChecked=186, Total=2450 [2021-12-21 10:15:42,136 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:46,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:46,414 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-12-21 10:15:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-21 10:15:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 10:15:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:46,415 INFO L225 Difference]: With dead ends: 77 [2021-12-21 10:15:46,415 INFO L226 Difference]: Without dead ends: 72 [2021-12-21 10:15:46,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1063, Invalid=5263, Unknown=2, NotChecked=314, Total=6642 [2021-12-21 10:15:46,417 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:46,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 110 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 612 Invalid, 0 Unknown, 128 Unchecked, 0.7s Time] [2021-12-21 10:15:46,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-21 10:15:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2021-12-21 10:15:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-21 10:15:46,426 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 27 [2021-12-21 10:15:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:46,426 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-21 10:15:46,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-21 10:15:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:15:46,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:46,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:46,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:46,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:46,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-12-21 10:15:46,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:46,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781678664] [2021-12-21 10:15:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:46,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:15:46,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:46,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781678664] [2021-12-21 10:15:46,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781678664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:46,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969116209] [2021-12-21 10:15:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:46,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:46,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:46,775 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) [2021-12-21 10:15:46,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:15:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 10:15:46,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:46,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 10:15:46,888 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:15:46,888 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 10:15:46,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-21 10:15:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:15:46,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:46,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-21 10:15:46,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-21 10:15:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:15:47,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969116209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:47,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:47,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-21 10:15:47,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13692754] [2021-12-21 10:15:47,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:47,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:15:47,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:47,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:15:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:15:47,011 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:47,232 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-21 10:15:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:15:47,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 10:15:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:47,233 INFO L225 Difference]: With dead ends: 63 [2021-12-21 10:15:47,233 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 10:15:47,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-21 10:15:47,234 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:47,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 59 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:15:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 10:15:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-21 10:15:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-21 10:15:47,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 27 [2021-12-21 10:15:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:47,239 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-21 10:15:47,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-21 10:15:47,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:15:47,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:47,240 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:47,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:47,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:47,459 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-12-21 10:15:47,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877544008] [2021-12-21 10:15:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:47,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:15:47,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877544008] [2021-12-21 10:15:47,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877544008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139468462] [2021-12-21 10:15:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:15:47,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:47,524 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) [2021-12-21 10:15:47,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:15:47,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 10:15:47,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:15:47,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:15:47,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:15:47,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:15:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139468462] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:47,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:47,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:15:47,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082943731] [2021-12-21 10:15:47,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:47,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:15:47,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:15:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:15:47,728 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:47,828 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-21 10:15:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:15:47,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 10:15:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:47,829 INFO L225 Difference]: With dead ends: 77 [2021-12-21 10:15:47,829 INFO L226 Difference]: Without dead ends: 43 [2021-12-21 10:15:47,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:15:47,830 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:47,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 28 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:15:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-21 10:15:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-21 10:15:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-21 10:15:47,834 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-12-21 10:15:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:47,834 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-21 10:15:47,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-21 10:15:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 10:15:47,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:47,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:47,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:48,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:48,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash -863925553, now seen corresponding path program 6 times [2021-12-21 10:15:48,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:48,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024360500] [2021-12-21 10:15:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:48,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:15:48,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024360500] [2021-12-21 10:15:48,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024360500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505612511] [2021-12-21 10:15:48,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:15:48,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:48,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:48,105 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) [2021-12-21 10:15:48,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:15:48,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-21 10:15:48,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:15:48,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:15:48,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:15:48,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:15:48,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505612511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:48,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:48,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:15:48,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672673119] [2021-12-21 10:15:48,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:48,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:15:48,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:48,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:15:48,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:15:48,304 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:15:48,422 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-21 10:15:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:15:48,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 10:15:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:15:48,422 INFO L225 Difference]: With dead ends: 42 [2021-12-21 10:15:48,423 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 10:15:48,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:15:48,423 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:15:48,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 18 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:15:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 10:15:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-21 10:15:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-21 10:15:48,428 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-12-21 10:15:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:15:48,428 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-21 10:15:48,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:15:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-21 10:15:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:15:48,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:15:48,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:15:48,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:15:48,635 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,SelfDestructingSolverStorable9 [2021-12-21 10:15:48,636 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:15:48,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:15:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2021-12-21 10:15:48,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:15:48,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319881597] [2021-12-21 10:15:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:15:48,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:15:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:49,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:15:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319881597] [2021-12-21 10:15:49,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319881597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:15:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499818418] [2021-12-21 10:15:49,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 10:15:49,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:15:49,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:15:49,705 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) [2021-12-21 10:15:49,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:15:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:15:49,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 10:15:49,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:15:49,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:15:49,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:15:49,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:15:49,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:15:49,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:15:50,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-21 10:15:50,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-21 10:15:50,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2021-12-21 10:15:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 53 [2021-12-21 10:15:50,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:15:50,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 53 [2021-12-21 10:15:50,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2021-12-21 10:15:50,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2021-12-21 10:15:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:15:50,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:15:53,203 INFO L353 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-12-21 10:15:53,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 14664 treesize of output 4694 [2021-12-21 10:15:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,247 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 29 treesize of output 19 [2021-12-21 10:15:53,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,258 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 43 treesize of output 25 [2021-12-21 10:15:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,268 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 27 treesize of output 17 [2021-12-21 10:15:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,277 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 23 treesize of output 13 [2021-12-21 10:15:53,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:15:53,285 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 23 treesize of output 13 [2021-12-21 10:15:53,335 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_7 (Array Int Int)) (~N~0 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (* 5 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_7))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ 5 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (+ .cse0 5 .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 5 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))))) (not (= (select v_arrayElimArr_7 |c_ULTIMATE.start_main_~a~0#1.offset|) 5)) (not (= (+ (select v_arrayElimArr_7 .cse5) 4) 9)) (not (= 5 (select v_arrayElimArr_7 .cse4))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)))) is different from false [2021-12-21 10:15:53,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_7 (Array Int Int)) (~N~0 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (* 5 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_7))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ 5 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (+ .cse0 5 .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 5 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))))) (not (= (select v_arrayElimArr_7 |c_ULTIMATE.start_main_~a~0#1.offset|) 5)) (not (= (+ (select v_arrayElimArr_7 .cse5) 4) 9)) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (= 5 (select v_arrayElimArr_7 .cse4))) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-21 10:15:53,500 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_7 (Array Int Int)) (~N~0 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (* 5 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_7))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ 5 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (+ .cse0 5 .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 5 .cse1))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4))))))) (not (= (select v_arrayElimArr_7 |c_ULTIMATE.start_main_~a~0#1.offset|) 5)) (not (= (+ (select v_arrayElimArr_7 .cse5) 4) 9)) (not (= 5 (select v_arrayElimArr_7 .cse4))) (<= ~N~0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0)))) is different from false [2021-12-21 10:15:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-21 10:15:53,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499818418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:15:53,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:15:53,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2021-12-21 10:15:53,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43400226] [2021-12-21 10:15:53,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:15:53,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-21 10:15:53,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:15:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-21 10:15:53,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=3558, Unknown=3, NotChecked=378, Total=4422 [2021-12-21 10:15:53,567 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 67 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:16:05,552 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-12-21 10:16:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-21 10:16:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 10:16:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:16:05,553 INFO L225 Difference]: With dead ends: 99 [2021-12-21 10:16:05,553 INFO L226 Difference]: Without dead ends: 81 [2021-12-21 10:16:05,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3342 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1114, Invalid=8597, Unknown=3, NotChecked=588, Total=10302 [2021-12-21 10:16:05,556 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:16:05,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 125 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 995 Invalid, 0 Unknown, 157 Unchecked, 1.2s Time] [2021-12-21 10:16:05,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-21 10:16:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2021-12-21 10:16:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-21 10:16:05,563 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 34 [2021-12-21 10:16:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:16:05,563 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-21 10:16:05,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-21 10:16:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:16:05,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:16:05,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:16:05,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 10:16:05,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:16:05,786 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:16:05,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:16:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-12-21 10:16:05,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:16:05,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23997589] [2021-12-21 10:16:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:16:05,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:16:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:16:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:16:05,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:16:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23997589] [2021-12-21 10:16:05,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23997589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:16:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831446387] [2021-12-21 10:16:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:16:05,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:16:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:16:05,946 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) [2021-12-21 10:16:05,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 10:16:06,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:16:06,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:16:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 10:16:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:16:06,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 10:16:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:06,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 10:16:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:06,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 10:16:06,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 10:16:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:16:06,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:16:06,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-21 10:16:06,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-21 10:16:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:16:06,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831446387] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:16:06,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:16:06,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2021-12-21 10:16:06,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653518165] [2021-12-21 10:16:06,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:16:06,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 10:16:06,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:16:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 10:16:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-12-21 10:16:06,396 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:16:06,725 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-21 10:16:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 10:16:06,726 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 10:16:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:16:06,726 INFO L225 Difference]: With dead ends: 76 [2021-12-21 10:16:06,726 INFO L226 Difference]: Without dead ends: 61 [2021-12-21 10:16:06,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 10:16:06,727 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:16:06,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 87 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:16:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-21 10:16:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-12-21 10:16:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-21 10:16:06,733 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2021-12-21 10:16:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:16:06,733 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-21 10:16:06,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-21 10:16:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 10:16:06,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:16:06,734 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:16:06,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 10:16:06,949 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,SelfDestructingSolverStorable11 [2021-12-21 10:16:06,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:16:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:16:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2021-12-21 10:16:06,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:16:06,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355132488] [2021-12-21 10:16:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:16:06,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:16:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:16:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:16:07,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:16:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355132488] [2021-12-21 10:16:07,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355132488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:16:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997532937] [2021-12-21 10:16:07,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:16:07,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:16:07,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:16:07,023 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) [2021-12-21 10:16:07,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 10:16:07,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:16:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:16:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:16:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:16:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:16:07,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:16:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:16:07,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997532937] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:16:07,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:16:07,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 10:16:07,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900821801] [2021-12-21 10:16:07,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:16:07,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:16:07,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:16:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:16:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:16:07,256 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:16:07,382 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-12-21 10:16:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:16:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-21 10:16:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:16:07,383 INFO L225 Difference]: With dead ends: 86 [2021-12-21 10:16:07,383 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 10:16:07,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-21 10:16:07,384 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 105 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:16:07,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:16:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 10:16:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-12-21 10:16:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-21 10:16:07,389 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2021-12-21 10:16:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:16:07,389 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-21 10:16:07,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-21 10:16:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:16:07,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:16:07,389 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:16:07,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 10:16:07,599 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,SelfDestructingSolverStorable12 [2021-12-21 10:16:07,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:16:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:16:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash 975408915, now seen corresponding path program 9 times [2021-12-21 10:16:07,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:16:07,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363283703] [2021-12-21 10:16:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:16:07,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:16:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:16:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 10:16:07,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:16:07,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363283703] [2021-12-21 10:16:07,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363283703] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:16:07,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488579004] [2021-12-21 10:16:07,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:16:07,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:16:07,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:16:07,675 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) [2021-12-21 10:16:07,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 10:16:07,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:16:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:16:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:16:07,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:16:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 10:16:07,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:16:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 10:16:07,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488579004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:16:07,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:16:07,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 10:16:07,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849428507] [2021-12-21 10:16:07,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:16:07,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:16:07,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:16:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:16:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:16:07,929 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:16:08,095 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-21 10:16:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 10:16:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-21 10:16:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:16:08,095 INFO L225 Difference]: With dead ends: 49 [2021-12-21 10:16:08,095 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 10:16:08,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-21 10:16:08,096 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:16:08,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 27 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:16:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 10:16:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-21 10:16:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-21 10:16:08,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 39 [2021-12-21 10:16:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:16:08,102 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-21 10:16:08,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:16:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-21 10:16:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 10:16:08,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:16:08,104 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:16:08,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 10:16:08,315 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,SelfDestructingSolverStorable13 [2021-12-21 10:16:08,315 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:16:08,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:16:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2021-12-21 10:16:08,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:16:08,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885502813] [2021-12-21 10:16:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:16:08,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:16:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:16:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:16:09,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:16:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885502813] [2021-12-21 10:16:09,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885502813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:16:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881017802] [2021-12-21 10:16:09,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:16:09,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:16:09,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:16:09,713 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) [2021-12-21 10:16:09,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 10:16:09,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:16:09,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:16:09,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-21 10:16:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:16:09,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:16:09,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:09,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:16:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:09,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:16:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:09,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:16:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:09,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 10:16:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-21 10:16:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-21 10:16:10,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-12-21 10:16:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2021-12-21 10:16:10,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:10,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-12-21 10:16:11,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 66 [2021-12-21 10:16:11,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:11,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 71 [2021-12-21 10:16:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2021-12-21 10:16:11,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:16:11,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 39 [2021-12-21 10:16:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:16:11,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:16:20,739 INFO L353 Elim1Store]: treesize reduction 3907, result has 18.3 percent of original size [2021-12-21 10:16:20,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 23 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 27 new quantified variables, introduced 190 case distinctions, treesize of input 1111282 treesize of output 254952 [2021-12-21 10:16:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,349 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 275 treesize of output 185 [2021-12-21 10:16:23,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,706 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 51 treesize of output 37 [2021-12-21 10:16:23,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,728 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 51 treesize of output 37 [2021-12-21 10:16:23,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,756 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 49 treesize of output 35 [2021-12-21 10:16:23,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,778 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 49 treesize of output 35 [2021-12-21 10:16:23,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,801 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 51 treesize of output 37 [2021-12-21 10:16:23,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,822 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 53 treesize of output 39 [2021-12-21 10:16:23,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,844 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 53 treesize of output 39 [2021-12-21 10:16:23,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,862 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 221 treesize of output 151 [2021-12-21 10:16:23,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,960 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 55 treesize of output 41 [2021-12-21 10:16:23,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,978 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 57 treesize of output 43 [2021-12-21 10:16:23,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:23,995 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 107 treesize of output 73 [2021-12-21 10:16:24,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,030 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 53 treesize of output 39 [2021-12-21 10:16:24,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,053 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 570 treesize of output 432 [2021-12-21 10:16:24,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,066 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 31 treesize of output 17 [2021-12-21 10:16:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,078 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 31 treesize of output 17 [2021-12-21 10:16:24,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,152 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 45 treesize of output 31 [2021-12-21 10:16:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,166 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 59 treesize of output 37 [2021-12-21 10:16:24,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,186 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 45 treesize of output 31 [2021-12-21 10:16:24,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,198 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 71 treesize of output 45 [2021-12-21 10:16:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,217 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 35 treesize of output 21 [2021-12-21 10:16:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:16:24,252 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 53 treesize of output 35 [2021-12-21 10:16:24,323 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse1 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 9 (+ 4 (select v_arrayElimArr_20 .cse0)))) (not (= (select v_arrayElimArr_20 .cse1) 5)) (not (= 5 (select v_arrayElimArr_20 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (= (+ (select v_arrayElimArr_20 .cse2) 4) 9)) (= (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_20))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse3 .cse4 .cse5 9 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))))))) (+ (* 5 ~N~0) 4)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0))))) is different from false [2021-12-21 10:16:24,396 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse1 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 9 (+ 4 (select v_arrayElimArr_20 .cse0)))) (not (= (select v_arrayElimArr_20 .cse1) 5)) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (not (= 5 (select v_arrayElimArr_20 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (= (+ (select v_arrayElimArr_20 .cse2) 4) 9)) (= (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_20))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse3 .cse4 .cse5 9 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))))))) (+ (* 5 ~N~0) 4))))) is different from false [2021-12-21 10:16:24,554 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse1 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 9 (+ 4 (select v_arrayElimArr_20 .cse0)))) (not (= (select v_arrayElimArr_20 .cse1) 5)) (not (= 5 (select v_arrayElimArr_20 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (= (+ (select v_arrayElimArr_20 .cse2) 4) 9)) (= (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_20))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse3 .cse4 .cse5 9 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))))))) (+ (* 5 ~N~0) 4)) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0))))) is different from false [2021-12-21 10:16:24,698 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse1 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 9 (+ 4 (select v_arrayElimArr_20 .cse0)))) (not (= (select v_arrayElimArr_20 .cse1) 5)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 4) ~N~0) (not (= 5 (select v_arrayElimArr_20 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (= (+ (select v_arrayElimArr_20 .cse2) 4) 9)) (= (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_20))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse5 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse3 .cse4 .cse5 9 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 5 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))))))) (+ (* 5 ~N~0) 4)) (not (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0))))) is different from false [2021-12-21 10:16:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2021-12-21 10:16:24,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881017802] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:16:24,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:16:24,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 86 [2021-12-21 10:16:24,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877970165] [2021-12-21 10:16:24,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:16:24,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-21 10:16:24,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:16:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-21 10:16:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=5932, Unknown=4, NotChecked=652, Total=7310 [2021-12-21 10:16:24,791 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 86 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 86 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)