./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array4_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:53:20,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:53:20,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:53:20,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:53:20,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:53:20,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:53:20,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:53:20,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:53:20,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:53:20,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:53:20,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:53:20,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:53:20,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:53:20,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:53:20,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:53:20,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:53:20,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:53:20,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:53:20,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:53:20,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:53:20,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:53:20,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:53:20,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:53:20,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:53:20,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:53:20,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:53:20,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:53:20,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:53:20,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:53:20,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:53:20,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:53:20,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:53:20,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:53:20,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:53:20,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:53:20,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:53:20,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:53:20,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:53:20,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:53:20,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:53:20,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:53:20,626 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:53:20,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:53:20,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:53:20,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:53:20,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:53:20,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:53:20,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:53:20,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:53:20,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:53:20,652 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:53:20,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:53:20,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:53:20,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:53:20,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:53:20,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:53:20,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:53:20,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:53:20,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:53:20,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:53:20,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:53:20,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:53:20,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:53:20,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:53:20,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:53:20,656 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:53:20,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:53:20,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:53:20,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:53:20,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2021-12-17 00:53:20,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:53:20,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:53:20,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:53:20,881 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:53:20,882 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:53:20,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-17 00:53:20,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7954f93dd/3b766cafd4c44651939e6d6d828bd277/FLAG4db262fe4 [2021-12-17 00:53:21,288 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:53:21,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2021-12-17 00:53:21,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7954f93dd/3b766cafd4c44651939e6d6d828bd277/FLAG4db262fe4 [2021-12-17 00:53:21,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7954f93dd/3b766cafd4c44651939e6d6d828bd277 [2021-12-17 00:53:21,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:53:21,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:53:21,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:53:21,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:53:21,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:53:21,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e15e628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21, skipping insertion in model container [2021-12-17 00:53:21,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:53:21,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:53:21,428 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-12-17 00:53:21,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:53:21,460 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:53:21,472 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-12-17 00:53:21,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:53:21,499 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:53:21,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21 WrapperNode [2021-12-17 00:53:21,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:53:21,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:53:21,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:53:21,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:53:21,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,525 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-12-17 00:53:21,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:53:21,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:53:21,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:53:21,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:53:21,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:53:21,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:53:21,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:53:21,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:53:21,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (1/1) ... [2021-12-17 00:53:21,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:53:21,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:21,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:53:21,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:53:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:53:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:53:21,621 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:53:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:53:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:53:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:53:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:53:21,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:53:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:53:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:53:21,668 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:53:21,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:53:21,762 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:53:21,767 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:53:21,767 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 00:53:21,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:53:21 BoogieIcfgContainer [2021-12-17 00:53:21,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:53:21,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:53:21,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:53:21,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:53:21,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:53:21" (1/3) ... [2021-12-17 00:53:21,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:53:21, skipping insertion in model container [2021-12-17 00:53:21,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:53:21" (2/3) ... [2021-12-17 00:53:21,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:53:21, skipping insertion in model container [2021-12-17 00:53:21,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:53:21" (3/3) ... [2021-12-17 00:53:21,774 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2021-12-17 00:53:21,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:53:21,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:53:21,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:53:21,817 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:53:21,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:53:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:53:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 00:53:21,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:21,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:21,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2021-12-17 00:53:21,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:21,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161460377] [2021-12-17 00:53:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:21,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:53:21,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:53:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:53:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:53:21,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:21,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161460377] [2021-12-17 00:53:21,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161460377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:53:21,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:53:21,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:53:21,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107642953] [2021-12-17 00:53:21,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:53:21,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:53:21,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:21,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:53:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:53:21,982 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:53:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:21,995 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2021-12-17 00:53:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:53:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 00:53:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:22,000 INFO L225 Difference]: With dead ends: 63 [2021-12-17 00:53:22,000 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 00:53:22,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:53:22,005 INFO L933 BasicCegarLoop]: 40 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, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:22,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:53:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 00:53:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-17 00:53:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:53:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-17 00:53:22,028 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2021-12-17 00:53:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:22,029 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-17 00:53:22,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 00:53:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-17 00:53:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 00:53:22,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:22,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:22,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:53:22,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:22,032 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2021-12-17 00:53:22,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:22,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293294286] [2021-12-17 00:53:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:22,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:22,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:22,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799353888] [2021-12-17 00:53:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:22,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:22,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:22,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:53:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:53:22,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 00:53:22,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:53:22,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:53:22,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:22,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293294286] [2021-12-17 00:53:22,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799353888] [2021-12-17 00:53:22,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799353888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:53:22,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:53:22,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 00:53:22,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222933760] [2021-12-17 00:53:22,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:53:22,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 00:53:22,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 00:53:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 00:53:22,321 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:53:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:22,359 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-12-17 00:53:22,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 00:53:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-12-17 00:53:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:22,361 INFO L225 Difference]: With dead ends: 70 [2021-12-17 00:53:22,361 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 00:53:22,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 00:53:22,362 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:22,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:53:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 00:53:22,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-12-17 00:53:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:53:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-17 00:53:22,372 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2021-12-17 00:53:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:22,373 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-17 00:53:22,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:53:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-17 00:53:22,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 00:53:22,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:22,374 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:22,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:22,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:22,575 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2021-12-17 00:53:22,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:22,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133268786] [2021-12-17 00:53:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:22,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:22,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441180472] [2021-12-17 00:53:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:22,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:22,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:22,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:22,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:53:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:53:22,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:53:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:53:22,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:53:22,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133268786] [2021-12-17 00:53:22,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441180472] [2021-12-17 00:53:22,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441180472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:53:22,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:53:22,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:53:22,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766203981] [2021-12-17 00:53:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:53:22,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:53:22,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:53:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:53:22,779 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:53:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:22,793 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-12-17 00:53:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:53:22,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-12-17 00:53:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:22,794 INFO L225 Difference]: With dead ends: 43 [2021-12-17 00:53:22,794 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 00:53:22,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:53:22,803 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:22,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:53:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 00:53:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-17 00:53:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:53:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-17 00:53:22,823 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2021-12-17 00:53:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:22,824 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-17 00:53:22,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:53:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-17 00:53:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 00:53:22,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:22,826 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:22,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:23,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 00:53:23,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:23,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:23,033 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2021-12-17 00:53:23,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:23,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076906580] [2021-12-17 00:53:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:23,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:23,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:23,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280495711] [2021-12-17 00:53:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:23,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:23,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:23,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:23,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:53:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:53:23,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:53:23,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 00:53:23,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:53:23,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076906580] [2021-12-17 00:53:23,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280495711] [2021-12-17 00:53:23,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280495711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:53:23,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:53:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:53:23,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119724365] [2021-12-17 00:53:23,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:53:23,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:53:23,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:23,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:53:23,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:53:23,202 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:53:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:23,278 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2021-12-17 00:53:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:53:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-12-17 00:53:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:23,280 INFO L225 Difference]: With dead ends: 77 [2021-12-17 00:53:23,280 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 00:53:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:53:23,281 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:53:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 00:53:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-17 00:53:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 00:53:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-17 00:53:23,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2021-12-17 00:53:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:23,286 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-17 00:53:23,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:53:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-17 00:53:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 00:53:23,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:23,287 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:23,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:23,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:23,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:23,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2021-12-17 00:53:23,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:23,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993143338] [2021-12-17 00:53:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:23,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:23,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:23,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160337053] [2021-12-17 00:53:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:23,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:23,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:23,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:23,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:53:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:53:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 00:53:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:23,630 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 [2021-12-17 00:53:24,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:24,107 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:53:24,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:53:24,122 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 [2021-12-17 00:53:24,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:24,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:24,334 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-12-17 00:53:24,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2021-12-17 00:53:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:53:24,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:24,462 INFO L354 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2021-12-17 00:53:24,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 111 [2021-12-17 00:53:24,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:53:24,482 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 155 treesize of output 155 [2021-12-17 00:53:24,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:53:24,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 164 [2021-12-17 00:53:24,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:53:24,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 148 [2021-12-17 00:53:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:25,097 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 39 treesize of output 37 [2021-12-17 00:53:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 00:53:26,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:26,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993143338] [2021-12-17 00:53:26,151 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:26,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160337053] [2021-12-17 00:53:26,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160337053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:53:26,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:53:26,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-12-17 00:53:26,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722889251] [2021-12-17 00:53:26,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:26,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 00:53:26,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:26,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 00:53:26,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-12-17 00:53:26,157 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:53:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:26,950 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2021-12-17 00:53:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 00:53:26,950 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 46 [2021-12-17 00:53:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:26,952 INFO L225 Difference]: With dead ends: 86 [2021-12-17 00:53:26,952 INFO L226 Difference]: Without dead ends: 82 [2021-12-17 00:53:26,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=1681, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 00:53:26,953 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:26,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 320 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 685 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2021-12-17 00:53:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-17 00:53:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2021-12-17 00:53:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 00:53:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2021-12-17 00:53:26,963 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 46 [2021-12-17 00:53:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:26,964 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2021-12-17 00:53:26,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:53:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2021-12-17 00:53:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 00:53:26,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:26,970 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:26,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 00:53:27,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:27,188 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2021-12-17 00:53:27,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331382235] [2021-12-17 00:53:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:27,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:27,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:27,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196485776] [2021-12-17 00:53:27,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:53:27,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:27,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:27,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:27,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:53:27,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:53:27,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:27,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:53:27,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 00:53:27,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:53:27,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331382235] [2021-12-17 00:53:27,403 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196485776] [2021-12-17 00:53:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196485776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:53:27,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:53:27,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-17 00:53:27,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149211853] [2021-12-17 00:53:27,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:27,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:53:27,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:27,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:53:27,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:53:27,405 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:27,545 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2021-12-17 00:53:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 00:53:27,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2021-12-17 00:53:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:27,546 INFO L225 Difference]: With dead ends: 146 [2021-12-17 00:53:27,546 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 00:53:27,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:53:27,547 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:27,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 169 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:53:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 00:53:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2021-12-17 00:53:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 00:53:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2021-12-17 00:53:27,557 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 48 [2021-12-17 00:53:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:27,558 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2021-12-17 00:53:27,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2021-12-17 00:53:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 00:53:27,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:27,559 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:27,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:27,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:27,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2021-12-17 00:53:27,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:27,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073642039] [2021-12-17 00:53:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:27,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:27,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:27,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938041301] [2021-12-17 00:53:27,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:53:27,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:27,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:27,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:27,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:53:27,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 00:53:27,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:27,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 00:53:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:27,873 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 [2021-12-17 00:53:28,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:28,233 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:53:28,237 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 28 treesize of output 28 [2021-12-17 00:53:28,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:53:28,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:53:28,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:53:28,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-12-17 00:53:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 00:53:28,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:28,600 INFO L354 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2021-12-17 00:53:28,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 111 [2021-12-17 00:53:28,625 INFO L354 Elim1Store]: treesize reduction 18, result has 59.1 percent of original size [2021-12-17 00:53:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 76 [2021-12-17 00:53:28,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:53:28,637 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 174 treesize of output 172 [2021-12-17 00:53:28,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:53:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 144 [2021-12-17 00:53:28,697 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 58 treesize of output 56 [2021-12-17 00:53:28,725 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 182 treesize of output 176 [2021-12-17 00:53:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 00:53:30,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073642039] [2021-12-17 00:53:30,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938041301] [2021-12-17 00:53:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938041301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:53:30,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:53:30,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-12-17 00:53:30,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615858007] [2021-12-17 00:53:30,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:30,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 00:53:30,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 00:53:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-12-17 00:53:30,181 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:53:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:31,077 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2021-12-17 00:53:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 00:53:31,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2021-12-17 00:53:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:31,079 INFO L225 Difference]: With dead ends: 132 [2021-12-17 00:53:31,079 INFO L226 Difference]: Without dead ends: 128 [2021-12-17 00:53:31,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=1712, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 00:53:31,080 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:31,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 185 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 396 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2021-12-17 00:53:31,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-17 00:53:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2021-12-17 00:53:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 88 states have internal predecessors, (96), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 00:53:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 154 transitions. [2021-12-17 00:53:31,091 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 154 transitions. Word has length 48 [2021-12-17 00:53:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:31,091 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 154 transitions. [2021-12-17 00:53:31,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-17 00:53:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 154 transitions. [2021-12-17 00:53:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 00:53:31,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:31,092 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:31,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:31,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:31,308 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2021-12-17 00:53:31,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:31,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811444496] [2021-12-17 00:53:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:31,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:31,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:31,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292340778] [2021-12-17 00:53:31,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:53:31,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:31,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:31,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:31,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 00:53:31,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:53:31,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-17 00:53:31,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:31,425 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 [2021-12-17 00:53:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:31,449 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:53:31,452 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 28 treesize of output 28 [2021-12-17 00:53:31,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:53:31,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:53:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:31,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:31,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-17 00:53:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:32,796 INFO L354 Elim1Store]: treesize reduction 84, result has 40.4 percent of original size [2021-12-17 00:53:32,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 91 [2021-12-17 00:53:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:33,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:33,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:33,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:33,227 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-12-17 00:53:33,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 102 treesize of output 58 [2021-12-17 00:53:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:53:33,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:37,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811444496] [2021-12-17 00:53:37,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292340778] [2021-12-17 00:53:37,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292340778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:53:37,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:53:37,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-17 00:53:37,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26827695] [2021-12-17 00:53:37,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:37,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 00:53:37,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:37,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 00:53:37,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=980, Unknown=1, NotChecked=0, Total=1190 [2021-12-17 00:53:37,505 INFO L87 Difference]: Start difference. First operand 122 states and 154 transitions. Second operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:53:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:38,009 INFO L93 Difference]: Finished difference Result 198 states and 250 transitions. [2021-12-17 00:53:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:53:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2021-12-17 00:53:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:38,011 INFO L225 Difference]: With dead ends: 198 [2021-12-17 00:53:38,011 INFO L226 Difference]: Without dead ends: 158 [2021-12-17 00:53:38,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=259, Invalid=1222, Unknown=1, NotChecked=0, Total=1482 [2021-12-17 00:53:38,012 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 53 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:38,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 269 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 418 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2021-12-17 00:53:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-17 00:53:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2021-12-17 00:53:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 103 states have (on average 1.116504854368932) internal successors, (115), 106 states have internal predecessors, (115), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 00:53:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 185 transitions. [2021-12-17 00:53:38,032 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 185 transitions. Word has length 50 [2021-12-17 00:53:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:38,033 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 185 transitions. [2021-12-17 00:53:38,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:53:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 185 transitions. [2021-12-17 00:53:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:53:38,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:38,036 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:38,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:38,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:38,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2021-12-17 00:53:38,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:38,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421592087] [2021-12-17 00:53:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:38,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:38,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:38,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268911232] [2021-12-17 00:53:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:53:38,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:38,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:38,283 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:38,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 00:53:38,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-17 00:53:38,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:53:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 00:53:38,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:53:38,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421592087] [2021-12-17 00:53:38,528 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268911232] [2021-12-17 00:53:38,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268911232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:53:38,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:53:38,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-17 00:53:38,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287000406] [2021-12-17 00:53:38,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 00:53:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 00:53:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:53:38,530 INFO L87 Difference]: Start difference. First operand 146 states and 185 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:38,839 INFO L93 Difference]: Finished difference Result 328 states and 414 transitions. [2021-12-17 00:53:38,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 00:53:38,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-12-17 00:53:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:38,841 INFO L225 Difference]: With dead ends: 328 [2021-12-17 00:53:38,841 INFO L226 Difference]: Without dead ends: 250 [2021-12-17 00:53:38,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:53:38,842 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 190 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:38,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 229 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:53:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-17 00:53:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2021-12-17 00:53:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 148 states have internal predecessors, (163), 55 states have call successors, (55), 9 states have call predecessors, (55), 9 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-12-17 00:53:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2021-12-17 00:53:38,857 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 52 [2021-12-17 00:53:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:38,858 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2021-12-17 00:53:38,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2021-12-17 00:53:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:53:38,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:38,859 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:38,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:39,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 00:53:39,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:39,068 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2021-12-17 00:53:39,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:39,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665524380] [2021-12-17 00:53:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:39,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:39,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234093474] [2021-12-17 00:53:39,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:53:39,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:39,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:39,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 00:53:39,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-17 00:53:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:39,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:53:39,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 00:53:39,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:53:39,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:39,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665524380] [2021-12-17 00:53:39,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:39,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234093474] [2021-12-17 00:53:39,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234093474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:53:39,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:53:39,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-17 00:53:39,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598876471] [2021-12-17 00:53:39,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:39,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 00:53:39,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 00:53:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:53:39,368 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:39,675 INFO L93 Difference]: Finished difference Result 239 states and 300 transitions. [2021-12-17 00:53:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:53:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-12-17 00:53:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:39,676 INFO L225 Difference]: With dead ends: 239 [2021-12-17 00:53:39,676 INFO L226 Difference]: Without dead ends: 235 [2021-12-17 00:53:39,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:53:39,677 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 85 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:39,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 260 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:53:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-17 00:53:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 215. [2021-12-17 00:53:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 152 states have internal predecessors, (167), 55 states have call successors, (55), 10 states have call predecessors, (55), 10 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-12-17 00:53:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 277 transitions. [2021-12-17 00:53:39,689 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 277 transitions. Word has length 52 [2021-12-17 00:53:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:39,690 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 277 transitions. [2021-12-17 00:53:39,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 277 transitions. [2021-12-17 00:53:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 00:53:39,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:39,691 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:39,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:39,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 00:53:39,896 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2021-12-17 00:53:39,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:39,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347408161] [2021-12-17 00:53:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:39,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:39,907 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:39,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156451917] [2021-12-17 00:53:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:53:39,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:39,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:39,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 00:53:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:53:40,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-17 00:53:40,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:40,021 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 [2021-12-17 00:53:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,046 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:53:40,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:53:40,051 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 [2021-12-17 00:53:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-17 00:53:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:40,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-12-17 00:53:44,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:44,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:44,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:44,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:45,002 INFO L354 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2021-12-17 00:53:45,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 127 [2021-12-17 00:53:45,848 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-12-17 00:53:45,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2021-12-17 00:53:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:53:45,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:47,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:47,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347408161] [2021-12-17 00:53:47,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:47,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156451917] [2021-12-17 00:53:47,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156451917] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:53:47,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:53:47,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-17 00:53:47,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633763432] [2021-12-17 00:53:47,183 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:47,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 00:53:47,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 00:53:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1604, Unknown=4, NotChecked=0, Total=1806 [2021-12-17 00:53:47,184 INFO L87 Difference]: Start difference. First operand 215 states and 277 transitions. Second operand has 31 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:53:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:48,126 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions. [2021-12-17 00:53:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 00:53:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2021-12-17 00:53:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:48,128 INFO L225 Difference]: With dead ends: 262 [2021-12-17 00:53:48,128 INFO L226 Difference]: Without dead ends: 258 [2021-12-17 00:53:48,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=214, Invalid=1762, Unknown=4, NotChecked=0, Total=1980 [2021-12-17 00:53:48,129 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 47 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:48,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 527 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 911 Invalid, 0 Unknown, 76 Unchecked, 0.8s Time] [2021-12-17 00:53:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-17 00:53:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 244. [2021-12-17 00:53:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 171 states have (on average 1.1169590643274854) internal successors, (191), 174 states have internal predecessors, (191), 59 states have call successors, (59), 13 states have call predecessors, (59), 13 states have return successors, (59), 56 states have call predecessors, (59), 59 states have call successors, (59) [2021-12-17 00:53:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 309 transitions. [2021-12-17 00:53:48,143 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 309 transitions. Word has length 54 [2021-12-17 00:53:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:48,143 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 309 transitions. [2021-12-17 00:53:48,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:53:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 309 transitions. [2021-12-17 00:53:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 00:53:48,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:48,144 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:48,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:48,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 00:53:48,347 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2021-12-17 00:53:48,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:48,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411303683] [2021-12-17 00:53:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:48,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:48,380 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:48,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790885069] [2021-12-17 00:53:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:53:48,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:48,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:48,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:48,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 00:53:48,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:53:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:53:48,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 00:53:48,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:53:48,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411303683] [2021-12-17 00:53:48,674 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:48,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790885069] [2021-12-17 00:53:48,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790885069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:53:48,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:53:48,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-17 00:53:48,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007143046] [2021-12-17 00:53:48,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:48,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:53:48,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:53:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:53:48,676 INFO L87 Difference]: Start difference. First operand 244 states and 309 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:49,235 INFO L93 Difference]: Finished difference Result 540 states and 690 transitions. [2021-12-17 00:53:49,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:53:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-17 00:53:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:49,237 INFO L225 Difference]: With dead ends: 540 [2021-12-17 00:53:49,237 INFO L226 Difference]: Without dead ends: 389 [2021-12-17 00:53:49,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:53:49,239 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 200 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:49,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 393 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:53:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-17 00:53:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 334. [2021-12-17 00:53:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 229 states have (on average 1.1179039301310043) internal successors, (256), 233 states have internal predecessors, (256), 89 states have call successors, (89), 15 states have call predecessors, (89), 15 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-17 00:53:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 434 transitions. [2021-12-17 00:53:49,257 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 434 transitions. Word has length 56 [2021-12-17 00:53:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:49,257 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 434 transitions. [2021-12-17 00:53:49,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 434 transitions. [2021-12-17 00:53:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 00:53:49,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:49,258 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:49,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:49,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 00:53:49,472 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2021-12-17 00:53:49,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:49,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883356142] [2021-12-17 00:53:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:49,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:49,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:49,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136835267] [2021-12-17 00:53:49,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:53:49,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:49,497 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:49,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 00:53:49,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 00:53:49,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:53:49,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 00:53:49,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:53:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 00:53:49,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:53:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883356142] [2021-12-17 00:53:49,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:53:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136835267] [2021-12-17 00:53:49,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136835267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:53:49,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:53:49,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-17 00:53:49,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714653816] [2021-12-17 00:53:49,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:53:49,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:53:49,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:53:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:53:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:53:49,834 INFO L87 Difference]: Start difference. First operand 334 states and 434 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:53:50,191 INFO L93 Difference]: Finished difference Result 368 states and 465 transitions. [2021-12-17 00:53:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:53:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-17 00:53:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:53:50,193 INFO L225 Difference]: With dead ends: 368 [2021-12-17 00:53:50,193 INFO L226 Difference]: Without dead ends: 364 [2021-12-17 00:53:50,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:53:50,193 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 124 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:53:50,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 381 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:53:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-12-17 00:53:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 336. [2021-12-17 00:53:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 231 states have (on average 1.1168831168831168) internal successors, (258), 235 states have internal predecessors, (258), 89 states have call successors, (89), 15 states have call predecessors, (89), 15 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-17 00:53:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 436 transitions. [2021-12-17 00:53:50,210 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 436 transitions. Word has length 56 [2021-12-17 00:53:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:53:50,211 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 436 transitions. [2021-12-17 00:53:50,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:53:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 436 transitions. [2021-12-17 00:53:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 00:53:50,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:53:50,212 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:53:50,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:53:50,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 00:53:50,416 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:53:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:53:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2021-12-17 00:53:50,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:53:50,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164881287] [2021-12-17 00:53:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:53:50,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:53:50,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:53:50,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299371795] [2021-12-17 00:53:50,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:53:50,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:53:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:53:50,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:53:50,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 00:53:50,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:53:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:53:50,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 126 conjunts are in the unsatisfiable core [2021-12-17 00:53:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:53:50,587 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 [2021-12-17 00:53:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,612 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-17 00:53:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-17 00:53:50,622 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 [2021-12-17 00:53:50,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-12-17 00:53:50,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-12-17 00:53:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:50,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-12-17 00:53:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:52,842 INFO L354 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2021-12-17 00:53:52,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 163 [2021-12-17 00:53:54,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:54,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:54,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:53:54,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:54,849 INFO L354 Elim1Store]: treesize reduction 100, result has 18.7 percent of original size [2021-12-17 00:53:54,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 272 treesize of output 138 [2021-12-17 00:53:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 00:53:55,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:55:00,336 INFO L354 Elim1Store]: treesize reduction 17, result has 66.0 percent of original size [2021-12-17 00:55:00,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 117546 treesize of output 75146 [2021-12-17 00:55:27,302 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-17 00:55:27,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:55:27,306 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 474162 treesize of output 468454 [2021-12-17 00:55:28,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:28,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:28,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:28,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:28,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:29,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:29,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:29,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:30,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:31,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:31,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:32,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:55:32,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:32,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:55:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver