./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/brs5.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 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:48:00,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:48:00,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:48:00,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:48:00,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:48:00,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:48:00,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:48:00,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:48:00,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:48:00,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:48:00,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:48:00,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:48:00,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:48:00,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:48:00,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:48:00,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:48:00,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:48:00,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:48:00,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:48:00,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:48:00,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:48:00,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:48:00,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:48:00,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:48:00,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:48:00,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:48:00,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:48:00,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:48:00,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:48:00,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:48:00,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:48:00,629 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:48:00,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:48:00,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:48:00,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:48:00,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:48:00,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:48:00,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:48:00,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:48:00,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:48:00,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:48:00,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:48:00,658 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:48:00,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:48:00,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:48:00,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:48:00,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:48:00,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:48:00,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:48:00,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:48:00,664 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:48:00,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:48:00,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:48:00,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:48:00,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:48:00,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:48:00,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:48:00,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:48:00,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:48:00,666 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:48:00,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:48:00,667 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:48:00,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:48:00,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:48:00,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:48:00,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:48:00,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:48:00,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:48:00,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:48:00,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:48:00,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:48:00,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:48:00,672 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:48:00,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:48:00,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:48:00,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:48:00,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 [2021-12-15 08:48:00,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:48:00,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:48:00,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:48:00,877 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:48:00,878 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:48:00,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs5.c [2021-12-15 08:48:00,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b72e68cc8/7ea05fe704694fd7987b25c377eb9217/FLAG74deebc4b [2021-12-15 08:48:01,311 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:48:01,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c [2021-12-15 08:48:01,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b72e68cc8/7ea05fe704694fd7987b25c377eb9217/FLAG74deebc4b [2021-12-15 08:48:01,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b72e68cc8/7ea05fe704694fd7987b25c377eb9217 [2021-12-15 08:48:01,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:48:01,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:48:01,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:48:01,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:48:01,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:48:01,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714d0a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01, skipping insertion in model container [2021-12-15 08:48:01,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:48:01,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:48:01,512 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/brs5.c[587,600] [2021-12-15 08:48:01,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:48:01,539 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:48:01,551 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/brs5.c[587,600] [2021-12-15 08:48:01,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:48:01,584 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:48:01,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01 WrapperNode [2021-12-15 08:48:01,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:48:01,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:48:01,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:48:01,586 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:48:01,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,634 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-15 08:48:01,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:48:01,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:48:01,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:48:01,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:48:01,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:48:01,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:48:01,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:48:01,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:48:01,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (1/1) ... [2021-12-15 08:48:01,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:48:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:01,728 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) [2021-12-15 08:48:01,730 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 [2021-12-15 08:48:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:48:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:48:01,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:48:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:48:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:48:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:48:01,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:48:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:48:01,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:48:01,806 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:48:01,807 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:48:01,898 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:48:01,901 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:48:01,902 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 08:48:01,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:48:01 BoogieIcfgContainer [2021-12-15 08:48:01,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:48:01,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:48:01,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:48:01,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:48:01,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:48:01" (1/3) ... [2021-12-15 08:48:01,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421f78f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:48:01, skipping insertion in model container [2021-12-15 08:48:01,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:01" (2/3) ... [2021-12-15 08:48:01,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421f78f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:48:01, skipping insertion in model container [2021-12-15 08:48:01,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:48:01" (3/3) ... [2021-12-15 08:48:01,908 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5.c [2021-12-15 08:48:01,912 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:48:01,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:48:01,958 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:48:01,962 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 [2021-12-15 08:48:01,963 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:48:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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) [2021-12-15 08:48:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 08:48:01,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:01,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:01,976 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-12-15 08:48:01,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:01,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33284378] [2021-12-15 08:48:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:01,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:02,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:02,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33284378] [2021-12-15 08:48:02,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33284378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:48:02,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:48:02,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:48:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371176530] [2021-12-15 08:48:02,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:48:02,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:48:02,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:48:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:48:02,178 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-15 08:48:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:02,186 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-15 08:48:02,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:48:02,188 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 08:48:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:02,192 INFO L225 Difference]: With dead ends: 36 [2021-12-15 08:48:02,193 INFO L226 Difference]: Without dead ends: 16 [2021-12-15 08:48:02,194 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 [2021-12-15 08:48:02,197 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-12-15 08:48:02,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:48:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-15 08:48:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-15 08:48:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-12-15 08:48:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-15 08:48:02,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-15 08:48:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:02,216 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-15 08:48:02,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-15 08:48:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-15 08:48:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 08:48:02,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:02,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:02,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:48:02,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:02,218 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-12-15 08:48:02,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:02,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609905632] [2021-12-15 08:48:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:02,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:02,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:02,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609905632] [2021-12-15 08:48:02,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609905632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:48:02,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:48:02,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:48:02,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498527776] [2021-12-15 08:48:02,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:48:02,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:48:02,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:48:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:48:02,329 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-15 08:48:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:02,381 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-15 08:48:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:48:02,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 08:48:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:02,383 INFO L225 Difference]: With dead ends: 33 [2021-12-15 08:48:02,383 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 08:48:02,383 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 [2021-12-15 08:48:02,386 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:02,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:48:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 08:48:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-15 08:48:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-12-15 08:48:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-15 08:48:02,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-12-15 08:48:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:02,393 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-15 08:48:02,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-15 08:48:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-15 08:48:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 08:48:02,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:02,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:02,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:48:02,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-12-15 08:48:02,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:02,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485276] [2021-12-15 08:48:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:02,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:02,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485276] [2021-12-15 08:48:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:48:02,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:48:02,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:48:02,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281225137] [2021-12-15 08:48:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:48:02,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:48:02,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:48:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:48:02,528 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:02,584 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-15 08:48:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:48:02,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 08:48:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:02,587 INFO L225 Difference]: With dead ends: 27 [2021-12-15 08:48:02,587 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 08:48:02,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:48:02,590 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:02,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:48:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 08:48:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-15 08:48:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-15 08:48:02,598 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-15 08:48:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:02,599 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-15 08:48:02,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-15 08:48:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 08:48:02,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:02,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:02,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:48:02,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-12-15 08:48:02,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:02,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236151930] [2021-12-15 08:48:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:02,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:02,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:02,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236151930] [2021-12-15 08:48:02,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236151930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:02,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17145692] [2021-12-15 08:48:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:02,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:02,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:02,696 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) [2021-12-15 08:48:02,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:48:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:02,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:48:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:02,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:02,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17145692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:02,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:02,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 08:48:02,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372048814] [2021-12-15 08:48:02,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:02,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:48:02,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:48:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:48:02,875 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-12-15 08:48:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:02,954 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-15 08:48:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:48:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 [2021-12-15 08:48:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:02,955 INFO L225 Difference]: With dead ends: 43 [2021-12-15 08:48:02,955 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 08:48:02,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:48:02,961 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:02,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:48:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 08:48:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-15 08:48:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2021-12-15 08:48:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-15 08:48:02,969 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-12-15 08:48:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:02,969 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-15 08:48:02,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-12-15 08:48:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-15 08:48:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 08:48:02,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:02,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:03,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:48:03,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:03,177 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-12-15 08:48:03,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:03,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919695623] [2021-12-15 08:48:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:03,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:03,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919695623] [2021-12-15 08:48:03,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919695623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847367738] [2021-12-15 08:48:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:03,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:03,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:03,609 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) [2021-12-15 08:48:03,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:48:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 08:48:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:03,690 INFO L388 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 [2021-12-15 08:48:03,756 INFO L388 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 19 treesize of output 15 [2021-12-15 08:48:03,853 INFO L388 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 27 treesize of output 26 [2021-12-15 08:48:03,944 INFO L388 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 39 treesize of output 26 [2021-12-15 08:48:04,021 INFO L388 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 26 treesize of output 10 [2021-12-15 08:48:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:04,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:06,550 INFO L388 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 222 treesize of output 210 [2021-12-15 08:48:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:07,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847367738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:07,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:07,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2021-12-15 08:48:07,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478601110] [2021-12-15 08:48:07,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:07,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 08:48:07,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 08:48:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=614, Unknown=4, NotChecked=0, Total=756 [2021-12-15 08:48:07,267 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2021-12-15 08:48:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:07,496 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-12-15 08:48:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 08:48:07,497 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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 23 [2021-12-15 08:48:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:07,497 INFO L225 Difference]: With dead ends: 56 [2021-12-15 08:48:07,498 INFO L226 Difference]: Without dead ends: 36 [2021-12-15 08:48:07,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=197, Invalid=855, Unknown=4, NotChecked=0, Total=1056 [2021-12-15 08:48:07,498 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:07,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 215 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-12-15 08:48:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-15 08:48:07,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-12-15 08:48:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 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) [2021-12-15 08:48:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-15 08:48:07,502 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2021-12-15 08:48:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:07,502 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-15 08:48:07,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2021-12-15 08:48:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-15 08:48:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 08:48:07,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:07,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:07,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:07,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:07,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:07,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:07,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2021-12-15 08:48:07,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:07,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858192833] [2021-12-15 08:48:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:07,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:07,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:07,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858192833] [2021-12-15 08:48:07,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858192833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:07,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667474143] [2021-12-15 08:48:07,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:48:07,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:07,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:07,791 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) [2021-12-15 08:48:07,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:48:07,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:48:07,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:48:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:07,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:07,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667474143] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:07,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:07,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:48:07,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227611530] [2021-12-15 08:48:07,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:07,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:48:07,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:48:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:48:07,954 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-12-15 08:48:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:08,065 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-12-15 08:48:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 08:48:08,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 26 [2021-12-15 08:48:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:08,066 INFO L225 Difference]: With dead ends: 79 [2021-12-15 08:48:08,066 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 08:48:08,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:48:08,067 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:08,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 36 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 08:48:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-12-15 08:48:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 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) [2021-12-15 08:48:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-15 08:48:08,070 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 26 [2021-12-15 08:48:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:08,071 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-15 08:48:08,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-12-15 08:48:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-15 08:48:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 08:48:08,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:08,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:08,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:08,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:08,301 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 3 times [2021-12-15 08:48:08,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:08,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759042092] [2021-12-15 08:48:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:08,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:08,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:08,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759042092] [2021-12-15 08:48:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759042092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:08,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818793184] [2021-12-15 08:48:08,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:48:08,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:08,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:08,775 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) [2021-12-15 08:48:08,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:48:08,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 08:48:08,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-15 08:48:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:08,861 INFO L388 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 [2021-12-15 08:48:08,902 INFO L388 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 15 treesize of output 11 [2021-12-15 08:48:08,988 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-15 08:48:08,988 INFO L388 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 1 case distinctions, treesize of input 28 treesize of output 27 [2021-12-15 08:48:09,145 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-15 08:48:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2021-12-15 08:48:09,241 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-12-15 08:48:09,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 56 [2021-12-15 08:48:09,401 INFO L354 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2021-12-15 08:48:09,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 68 [2021-12-15 08:48:09,987 INFO L354 Elim1Store]: treesize reduction 96, result has 6.8 percent of original size [2021-12-15 08:48:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 21 [2021-12-15 08:48:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:48:10,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:42,052 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-15 08:48:42,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2627 treesize of output 2545 [2021-12-15 08:48:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:48:44,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818793184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:44,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:44,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 45 [2021-12-15 08:48:44,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439907120] [2021-12-15 08:48:44,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:44,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 08:48:44,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 08:48:44,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1676, Unknown=15, NotChecked=0, Total=1980 [2021-12-15 08:48:44,600 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 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) [2021-12-15 08:48:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:49,853 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-12-15 08:48:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 08:48:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 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 [2021-12-15 08:48:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:49,856 INFO L225 Difference]: With dead ends: 78 [2021-12-15 08:48:49,856 INFO L226 Difference]: Without dead ends: 73 [2021-12-15 08:48:49,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=730, Invalid=3945, Unknown=17, NotChecked=0, Total=4692 [2021-12-15 08:48:49,859 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:49,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 232 Invalid, 0 Unknown, 265 Unchecked, 0.1s Time] [2021-12-15 08:48:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-15 08:48:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-12-15 08:48:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 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) [2021-12-15 08:48:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-15 08:48:49,864 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 29 [2021-12-15 08:48:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:49,865 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-15 08:48:49,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 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) [2021-12-15 08:48:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-15 08:48:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:48:49,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:49,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:49,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 08:48:50,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:50,070 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1722173266, now seen corresponding path program 4 times [2021-12-15 08:48:50,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:50,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317319548] [2021-12-15 08:48:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:50,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:50,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317319548] [2021-12-15 08:48:50,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317319548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264217499] [2021-12-15 08:48:50,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:48:50,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:50,188 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) [2021-12-15 08:48:50,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:48:50,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:48:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:50,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:48:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:50,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264217499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:50,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:50,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:48:50,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206428772] [2021-12-15 08:48:50,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:50,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:48:50,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:48:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:48:50,386 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2021-12-15 08:48:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:50,577 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2021-12-15 08:48:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 08:48:50,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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 [2021-12-15 08:48:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:50,578 INFO L225 Difference]: With dead ends: 140 [2021-12-15 08:48:50,578 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 08:48:50,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-12-15 08:48:50,581 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:50,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 38 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 08:48:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2021-12-15 08:48:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 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) [2021-12-15 08:48:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-12-15 08:48:50,586 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2021-12-15 08:48:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:50,586 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-12-15 08:48:50,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 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) [2021-12-15 08:48:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-12-15 08:48:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 08:48:50,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:50,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:50,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:50,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:50,800 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:50,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash 456261758, now seen corresponding path program 5 times [2021-12-15 08:48:50,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:50,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595929883] [2021-12-15 08:48:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:50,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:51,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595929883] [2021-12-15 08:48:51,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595929883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:51,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265771879] [2021-12-15 08:48:51,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:48:51,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:51,549 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) [2021-12-15 08:48:51,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:48:51,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 08:48:51,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 08:48:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:51,623 INFO L388 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 [2021-12-15 08:48:51,664 INFO L388 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 15 treesize of output 11 [2021-12-15 08:48:51,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:51,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 08:48:51,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:51,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:51,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:51,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-12-15 08:48:51,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:51,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:51,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 47 [2021-12-15 08:48:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:52,046 INFO L388 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 66 treesize of output 59 [2021-12-15 08:48:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,181 INFO L388 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 80 treesize of output 60 [2021-12-15 08:48:52,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:52,367 INFO L388 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 67 treesize of output 52 [2021-12-15 08:48:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:52,524 INFO L388 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 58 treesize of output 18 [2021-12-15 08:48:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:52,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:59,302 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_236 Int) (v_ArrVal_243 Int) (v_ArrVal_240 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_236)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (< (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_240)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) v_ArrVal_240) v_ArrVal_243) (< (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) v_ArrVal_240) (<= (div (+ (* v_ArrVal_243 (- 1)) (* (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_243)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (- 1))) (- 5)) 4) (< 0 v_ArrVal_236))))) is different from false