./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn2.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-fpi/ifeqn2.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 cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:50:21,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:50:21,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:50:21,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:50:21,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:50:21,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:50:21,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:50:21,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:50:21,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:50:21,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:50:21,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:50:21,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:50:21,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:50:21,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:50:21,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:50:21,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:50:21,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:50:21,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:50:21,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:50:21,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:50:21,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:50:21,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:50:21,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:50:21,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:50:21,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:50:21,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:50:21,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:50:21,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:50:21,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:50:21,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:50:21,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:50:21,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:50:21,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:50:21,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:50:21,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:50:21,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:50:21,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:50:21,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:50:21,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:50:21,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:50:21,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:50:21,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:50:21,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:50:21,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:50:21,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:50:21,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:50:21,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:50:21,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:50:21,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:50:21,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:50:21,477 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:50:21,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:50:21,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:50:21,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:50:21,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:50:21,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:50:21,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:50:21,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:50:21,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:50:21,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:50:21,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:50:21,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:50:21,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:50:21,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:50:21,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:50:21,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:50:21,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:50:21,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:50:21,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:50:21,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:50:21,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:50:21,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:50:21,480 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:50:21,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:50:21,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:50:21,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:50:21,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb71614531ba069deddebdade1f57f90be50d3de3732c63efbb92b9f6b8c62e1 [2021-12-15 21:50:21,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:50:21,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:50:21,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:50:21,677 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:50:21,678 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:50:21,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn2.c [2021-12-15 21:50:21,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53959955e/2f1a22dba5b048ffa9260fed55e0719c/FLAGf115b00a6 [2021-12-15 21:50:22,119 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:50:22,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn2.c [2021-12-15 21:50:22,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53959955e/2f1a22dba5b048ffa9260fed55e0719c/FLAGf115b00a6 [2021-12-15 21:50:22,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53959955e/2f1a22dba5b048ffa9260fed55e0719c [2021-12-15 21:50:22,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:50:22,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:50:22,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:50:22,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:50:22,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:50:22,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f24d831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22, skipping insertion in model container [2021-12-15 21:50:22,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:50:22,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:50:22,273 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-12-15 21:50:22,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:50:22,290 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:50:22,297 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-12-15 21:50:22,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:50:22,310 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:50:22,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22 WrapperNode [2021-12-15 21:50:22,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:50:22,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:50:22,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:50:22,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:50:22,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,333 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-12-15 21:50:22,333 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:50:22,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:50:22,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:50:22,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:50:22,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:50:22,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:50:22,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:50:22,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:50:22,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (1/1) ... [2021-12-15 21:50:22,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:50:22,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:22,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:50:22,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:50:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:50:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:50:22,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:50:22,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:50:22,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:50:22,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:50:22,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:50:22,444 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:50:22,445 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:50:22,543 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:50:22,547 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:50:22,548 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 21:50:22,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:50:22 BoogieIcfgContainer [2021-12-15 21:50:22,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:50:22,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:50:22,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:50:22,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:50:22,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:50:22" (1/3) ... [2021-12-15 21:50:22,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1262ef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:50:22, skipping insertion in model container [2021-12-15 21:50:22,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:50:22" (2/3) ... [2021-12-15 21:50:22,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1262ef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:50:22, skipping insertion in model container [2021-12-15 21:50:22,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:50:22" (3/3) ... [2021-12-15 21:50:22,570 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2021-12-15 21:50:22,574 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:50:22,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:50:22,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:50:22,608 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:50:22,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:50:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 21:50:22,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:22,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:22,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-12-15 21:50:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:22,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2402679] [2021-12-15 21:50:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:22,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:22,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2402679] [2021-12-15 21:50:22,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2402679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:50:22,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:50:22,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:50:22,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970345536] [2021-12-15 21:50:22,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:50:22,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:50:22,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:50:22,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:50:22,837 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:22,853 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-12-15 21:50:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:50:22,855 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 21:50:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:22,861 INFO L225 Difference]: With dead ends: 42 [2021-12-15 21:50:22,861 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 21:50:22,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:50:22,867 INFO L933 BasicCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:22,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:50:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 21:50:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-15 21:50:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-15 21:50:22,892 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-12-15 21:50:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:22,892 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-15 21:50:22,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-15 21:50:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 21:50:22,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:22,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:22,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:50:22,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:22,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-12-15 21:50:22,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:22,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992487027] [2021-12-15 21:50:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:22,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:22,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:22,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992487027] [2021-12-15 21:50:23,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992487027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:50:23,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:50:23,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:50:23,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913283823] [2021-12-15 21:50:23,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:50:23,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:50:23,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:50:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:50:23,008 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:23,065 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-12-15 21:50:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:50:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 21:50:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:23,067 INFO L225 Difference]: With dead ends: 45 [2021-12-15 21:50:23,068 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 21:50:23,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:50:23,072 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:23,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:50:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 21:50:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-12-15 21:50:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-15 21:50:23,083 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-12-15 21:50:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:23,083 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-15 21:50:23,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-15 21:50:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 21:50:23,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:23,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:23,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:50:23,085 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-12-15 21:50:23,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:23,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529511338] [2021-12-15 21:50:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:23,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:23,108 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618934894] [2021-12-15 21:50:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:23,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:23,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:50:23,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:50:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:23,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 21:50:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:23,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:50:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:50:23,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:50:23,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529511338] [2021-12-15 21:50:23,336 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618934894] [2021-12-15 21:50:23,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618934894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:50:23,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:50:23,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:50:23,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466374416] [2021-12-15 21:50:23,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:50:23,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:50:23,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:23,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:50:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:50:23,342 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:23,416 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-12-15 21:50:23,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:50:23,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 21:50:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:23,418 INFO L225 Difference]: With dead ends: 40 [2021-12-15 21:50:23,418 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 21:50:23,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:50:23,419 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:23,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:50:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 21:50:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-12-15 21:50:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-12-15 21:50:23,422 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-12-15 21:50:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-12-15 21:50:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-12-15 21:50:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 21:50:23,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:23,424 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:23,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:50:23,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:23,643 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-12-15 21:50:23,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369799948] [2021-12-15 21:50:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:23,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:23,661 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:23,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099507059] [2021-12-15 21:50:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:23,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:23,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:23,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:50:23,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:50:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:23,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:50:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:23,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:50:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:23,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:23,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369799948] [2021-12-15 21:50:23,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:23,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099507059] [2021-12-15 21:50:23,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099507059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:50:23,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:50:23,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-15 21:50:23,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75362612] [2021-12-15 21:50:23,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:50:23,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:50:23,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:23,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:50:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:50:23,809 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:23,920 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-12-15 21:50:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:50:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 21:50:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:23,922 INFO L225 Difference]: With dead ends: 70 [2021-12-15 21:50:23,922 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 21:50:23,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:50:23,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:23,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:50:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 21:50:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-12-15 21:50:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-15 21:50:23,943 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-12-15 21:50:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:23,943 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-15 21:50:23,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-15 21:50:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:50:23,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:23,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:23,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:50:24,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 21:50:24,152 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-12-15 21:50:24,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724943995] [2021-12-15 21:50:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:24,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:24,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:24,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419077012] [2021-12-15 21:50:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:24,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:24,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:24,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:50:24,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:50:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:24,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 21:50:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:24,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:50:24,335 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-15 21:50:24,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 21:50:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:50:24,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:50:24,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-12-15 21:50:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 21:50:24,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:24,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724943995] [2021-12-15 21:50:24,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:24,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419077012] [2021-12-15 21:50:24,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419077012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:50:24,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:50:24,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-12-15 21:50:24,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019485535] [2021-12-15 21:50:24,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:50:24,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:50:24,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:50:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:50:24,580 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:24,726 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-12-15 21:50:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 21:50:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 21:50:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:24,727 INFO L225 Difference]: With dead ends: 73 [2021-12-15 21:50:24,727 INFO L226 Difference]: Without dead ends: 61 [2021-12-15 21:50:24,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:50:24,728 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:24,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 80 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-15 21:50:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-15 21:50:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-12-15 21:50:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-12-15 21:50:24,732 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2021-12-15 21:50:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:24,732 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-12-15 21:50:24,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-12-15 21:50:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:50:24,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:24,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:24,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 21:50:24,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:24,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-12-15 21:50:24,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:24,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721607747] [2021-12-15 21:50:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:24,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:24,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:24,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363127090] [2021-12-15 21:50:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:24,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:24,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:24,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:50:24,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:50:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:50:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 21:50:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:25,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 21:50:25,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:50:25,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:25,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-15 21:50:25,199 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 19 treesize of output 18 [2021-12-15 21:50:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:25,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-15 21:50:25,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-12-15 21:50:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:25,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:50:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:25,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721607747] [2021-12-15 21:50:25,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363127090] [2021-12-15 21:50:25,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363127090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:50:25,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:50:25,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-12-15 21:50:25,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20517638] [2021-12-15 21:50:25,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:50:25,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 21:50:25,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 21:50:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-12-15 21:50:25,961 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:41,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 12.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-15 21:50:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:55,289 INFO L93 Difference]: Finished difference Result 158 states and 187 transitions. [2021-12-15 21:50:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 21:50:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-15 21:50:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:55,292 INFO L225 Difference]: With dead ends: 158 [2021-12-15 21:50:55,292 INFO L226 Difference]: Without dead ends: 127 [2021-12-15 21:50:55,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=359, Invalid=1361, Unknown=2, NotChecked=0, Total=1722 [2021-12-15 21:50:55,294 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 171 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:55,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 175 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 292 Invalid, 1 Unknown, 73 Unchecked, 12.9s Time] [2021-12-15 21:50:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-15 21:50:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 78. [2021-12-15 21:50:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-12-15 21:50:55,302 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 28 [2021-12-15 21:50:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:55,303 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-12-15 21:50:55,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-12-15 21:50:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 21:50:55,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:55,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:55,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:50:55,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:55,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash -849177916, now seen corresponding path program 2 times [2021-12-15 21:50:55,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135638925] [2021-12-15 21:50:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:55,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:55,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:55,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493756212] [2021-12-15 21:50:55,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:50:55,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:55,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:55,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:50:55,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:50:55,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:50:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:50:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:50:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:50:55,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:50:55,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135638925] [2021-12-15 21:50:55,651 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493756212] [2021-12-15 21:50:55,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493756212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:50:55,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:50:55,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:50:55,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29032947] [2021-12-15 21:50:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:50:55,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:50:55,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:55,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:50:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:50:55,654 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:55,720 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2021-12-15 21:50:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:50:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 21:50:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:55,721 INFO L225 Difference]: With dead ends: 121 [2021-12-15 21:50:55,721 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 21:50:55,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:50:55,722 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:55,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:50:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 21:50:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-12-15 21:50:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 65 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2021-12-15 21:50:55,727 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 30 [2021-12-15 21:50:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:55,728 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2021-12-15 21:50:55,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2021-12-15 21:50:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 21:50:55,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:55,728 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:55,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:50:55,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:55,929 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1242204926, now seen corresponding path program 3 times [2021-12-15 21:50:55,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:55,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465528826] [2021-12-15 21:50:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:55,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:55,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:55,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100704261] [2021-12-15 21:50:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:50:55,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:55,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:50:55,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:50:56,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 21:50:56,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:50:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 21:50:56,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:50:56,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:50:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:50:56,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:56,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465528826] [2021-12-15 21:50:56,418 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:56,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100704261] [2021-12-15 21:50:56,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100704261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:50:56,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:50:56,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-12-15 21:50:56,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476121054] [2021-12-15 21:50:56,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:50:56,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 21:50:56,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:56,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 21:50:56,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-15 21:50:56,419 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:56,714 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-12-15 21:50:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 21:50:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 21:50:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:56,715 INFO L225 Difference]: With dead ends: 116 [2021-12-15 21:50:56,715 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 21:50:56,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-12-15 21:50:56,716 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 221 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:56,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 66 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:50:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 21:50:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2021-12-15 21:50:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-12-15 21:50:56,732 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 30 [2021-12-15 21:50:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:56,732 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-12-15 21:50:56,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-12-15 21:50:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 21:50:56,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:56,733 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:56,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:50:56,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:56,938 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2021-12-15 21:50:56,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:56,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101972976] [2021-12-15 21:50:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:56,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:56,950 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:56,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232942506] [2021-12-15 21:50:56,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:50:56,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:56,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:56,960 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) [2021-12-15 21:50:56,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:50:57,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:50:57,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:50:57,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:50:57,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 21:50:57,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:50:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 21:50:57,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101972976] [2021-12-15 21:50:57,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232942506] [2021-12-15 21:50:57,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232942506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:50:57,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:50:57,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-15 21:50:57,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038703794] [2021-12-15 21:50:57,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:50:57,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 21:50:57,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:57,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 21:50:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:50:57,184 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:57,327 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-12-15 21:50:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:50:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-15 21:50:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:57,328 INFO L225 Difference]: With dead ends: 102 [2021-12-15 21:50:57,328 INFO L226 Difference]: Without dead ends: 77 [2021-12-15 21:50:57,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-15 21:50:57,329 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:57,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 62 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:50:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-15 21:50:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-12-15 21:50:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-12-15 21:50:57,334 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 32 [2021-12-15 21:50:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:57,334 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-12-15 21:50:57,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-12-15 21:50:57,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 21:50:57,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:57,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:57,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:50:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:57,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1847758638, now seen corresponding path program 4 times [2021-12-15 21:50:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:57,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760080491] [2021-12-15 21:50:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:57,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:57,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:57,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021234617] [2021-12-15 21:50:57,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:50:57,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:57,563 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) [2021-12-15 21:50:57,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:50:57,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:50:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:50:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 21:50:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:57,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:50:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:57,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:50:57,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760080491] [2021-12-15 21:50:57,825 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:50:57,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021234617] [2021-12-15 21:50:57,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021234617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:50:57,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:50:57,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-15 21:50:57,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228690700] [2021-12-15 21:50:57,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:50:57,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 21:50:57,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:50:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 21:50:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:50:57,826 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:50:58,050 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-12-15 21:50:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 21:50:58,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-15 21:50:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:50:58,051 INFO L225 Difference]: With dead ends: 116 [2021-12-15 21:50:58,051 INFO L226 Difference]: Without dead ends: 103 [2021-12-15 21:50:58,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-12-15 21:50:58,052 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 145 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:50:58,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 96 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:50:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-15 21:50:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2021-12-15 21:50:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-12-15 21:50:58,069 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 33 [2021-12-15 21:50:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:50:58,070 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-12-15 21:50:58,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:50:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-12-15 21:50:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 21:50:58,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:50:58,071 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:50:58,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:50:58,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 21:50:58,283 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:50:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:50:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1646708229, now seen corresponding path program 3 times [2021-12-15 21:50:58,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:50:58,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050498771] [2021-12-15 21:50:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:50:58,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:50:58,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:50:58,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883308055] [2021-12-15 21:50:58,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:50:58,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:50:58,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:50:58,299 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) [2021-12-15 21:50:58,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:50:58,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 21:50:58,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:50:58,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-15 21:50:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:50:58,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 21:50:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:50:58,628 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 56 treesize of output 49 [2021-12-15 21:50:58,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-15 21:50:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-12-15 21:50:58,725 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 56 treesize of output 49 [2021-12-15 21:50:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-15 21:50:58,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 21:50:58,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-12-15 21:50:58,885 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 19 treesize of output 18 [2021-12-15 21:50:59,007 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 21:50:59,007 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 125 [2021-12-15 21:50:59,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:50:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 153 [2021-12-15 21:50:59,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 21:50:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 48 [2021-12-15 21:50:59,218 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 21:50:59,218 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 70 [2021-12-15 21:50:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 83 [2021-12-15 21:50:59,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 21:50:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:50:59,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 39 [2021-12-15 21:50:59,509 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 21:50:59,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2021-12-15 21:50:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:50:59,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:01,713 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-12-15 21:51:01,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 228 treesize of output 176 [2021-12-15 21:51:01,725 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-15 21:51:01,725 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 172 treesize of output 164 [2021-12-15 21:51:01,735 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-15 21:51:01,735 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 144 treesize of output 132 [2021-12-15 21:51:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:51:01,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:01,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050498771] [2021-12-15 21:51:01,811 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:01,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883308055] [2021-12-15 21:51:01,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883308055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:01,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:01,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 39 [2021-12-15 21:51:01,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930143429] [2021-12-15 21:51:01,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:01,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 21:51:01,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:01,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 21:51:01,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1161, Unknown=1, NotChecked=0, Total=1482 [2021-12-15 21:51:01,812 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:02,703 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-12-15 21:51:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 21:51:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 21:51:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:02,704 INFO L225 Difference]: With dead ends: 98 [2021-12-15 21:51:02,704 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 21:51:02,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=442, Invalid=1719, Unknown=1, NotChecked=0, Total=2162 [2021-12-15 21:51:02,708 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:02,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 112 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 192 Invalid, 0 Unknown, 440 Unchecked, 0.2s Time] [2021-12-15 21:51:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 21:51:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2021-12-15 21:51:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 85 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-12-15 21:51:02,724 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 34 [2021-12-15 21:51:02,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:02,724 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-12-15 21:51:02,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-12-15 21:51:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 21:51:02,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:02,728 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:02,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:02,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:02,929 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash -653025448, now seen corresponding path program 4 times [2021-12-15 21:51:02,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:02,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164947262] [2021-12-15 21:51:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:02,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:02,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:02,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684053499] [2021-12-15 21:51:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:51:02,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:02,947 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) [2021-12-15 21:51:02,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:51:02,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:51:02,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:02,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 21:51:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:51:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:51:03,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:03,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164947262] [2021-12-15 21:51:03,172 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:03,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684053499] [2021-12-15 21:51:03,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684053499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:03,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:03,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-12-15 21:51:03,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721915192] [2021-12-15 21:51:03,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:03,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-15 21:51:03,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-15 21:51:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:51:03,174 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:03,454 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-12-15 21:51:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 21:51:03,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 21:51:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:03,456 INFO L225 Difference]: With dead ends: 120 [2021-12-15 21:51:03,456 INFO L226 Difference]: Without dead ends: 99 [2021-12-15 21:51:03,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-12-15 21:51:03,456 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:03,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 100 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:51:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-15 21:51:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2021-12-15 21:51:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-12-15 21:51:03,460 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 34 [2021-12-15 21:51:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:03,460 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-12-15 21:51:03,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-12-15 21:51:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 21:51:03,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:03,461 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:03,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-15 21:51:03,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 21:51:03,661 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1259217666, now seen corresponding path program 5 times [2021-12-15 21:51:03,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:03,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46691245] [2021-12-15 21:51:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:03,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:03,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:03,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450827813] [2021-12-15 21:51:03,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:51:03,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:03,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:03,681 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) [2021-12-15 21:51:03,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 21:51:04,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 21:51:04,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 21:51:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:04,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:51:04,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2021-12-15 21:51:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-15 21:51:04,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 21:51:04,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-12-15 21:51:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2021-12-15 21:51:04,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 60 [2021-12-15 21:51:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2021-12-15 21:51:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:04,743 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 21 treesize of output 20 [2021-12-15 21:51:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:51:04,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:05,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-15 21:51:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 21:51:05,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46691245] [2021-12-15 21:51:05,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450827813] [2021-12-15 21:51:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450827813] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:05,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:05,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-12-15 21:51:05,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645659145] [2021-12-15 21:51:05,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:05,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 21:51:05,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 21:51:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-12-15 21:51:05,300 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:05,625 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2021-12-15 21:51:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 21:51:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-15 21:51:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:05,626 INFO L225 Difference]: With dead ends: 109 [2021-12-15 21:51:05,626 INFO L226 Difference]: Without dead ends: 107 [2021-12-15 21:51:05,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2021-12-15 21:51:05,627 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:05,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 130 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 203 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2021-12-15 21:51:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-15 21:51:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2021-12-15 21:51:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-12-15 21:51:05,633 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 36 [2021-12-15 21:51:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:05,633 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-12-15 21:51:05,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-12-15 21:51:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 21:51:05,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:05,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:05,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:05,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 21:51:05,840 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 5 times [2021-12-15 21:51:05,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:05,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522634354] [2021-12-15 21:51:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:05,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:05,858 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:05,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177095828] [2021-12-15 21:51:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:51:05,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:05,884 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) [2021-12-15 21:51:05,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 21:51:06,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 21:51:06,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-15 21:51:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 21:51:06,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:51:06,296 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 108 treesize of output 97 [2021-12-15 21:51:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 131 [2021-12-15 21:51:06,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 76 [2021-12-15 21:51:06,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-15 21:51:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-15 21:51:06,601 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 21:51:06,602 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 135 [2021-12-15 21:51:06,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 156 [2021-12-15 21:51:06,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 29 [2021-12-15 21:51:06,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:06,771 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-15 21:51:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2021-12-15 21:51:07,406 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-12-15 21:51:07,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 42 [2021-12-15 21:51:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:51:07,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:51:18,825 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-12-15 21:51:18,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 14596 treesize of output 11168 [2021-12-15 21:51:18,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:18,931 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 857 treesize of output 813 [2021-12-15 21:51:18,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:18,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:18,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:18,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 302 [2021-12-15 21:51:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:51:19,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:51:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522634354] [2021-12-15 21:51:19,062 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-15 21:51:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177095828] [2021-12-15 21:51:19,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177095828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:51:19,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 21:51:19,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-12-15 21:51:19,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193620509] [2021-12-15 21:51:19,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 21:51:19,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 21:51:19,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:51:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 21:51:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=944, Unknown=1, NotChecked=0, Total=1122 [2021-12-15 21:51:19,064 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:51:28,688 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-12-15 21:51:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 21:51:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 21:51:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:51:28,689 INFO L225 Difference]: With dead ends: 94 [2021-12-15 21:51:28,689 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 21:51:28,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=261, Invalid=1378, Unknown=1, NotChecked=0, Total=1640 [2021-12-15 21:51:28,690 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 21:51:28,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 138 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 302 Invalid, 0 Unknown, 155 Unchecked, 1.8s Time] [2021-12-15 21:51:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 21:51:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 51. [2021-12-15 21:51:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-12-15 21:51:28,693 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 38 [2021-12-15 21:51:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:51:28,695 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-12-15 21:51:28,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:51:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-12-15 21:51:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 21:51:28,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:51:28,696 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:51:28,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 21:51:28,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 21:51:28,899 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:51:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:51:28,900 INFO L85 PathProgramCache]: Analyzing trace with hash 173090424, now seen corresponding path program 6 times [2021-12-15 21:51:28,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:51:28,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298886488] [2021-12-15 21:51:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:51:28,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:51:28,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-15 21:51:28,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478317051] [2021-12-15 21:51:28,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:51:28,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:51:28,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:51:28,934 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) [2021-12-15 21:51:28,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 21:51:29,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 21:51:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:51:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-15 21:51:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:51:29,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 21:51:29,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:51:29,486 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 108 treesize of output 97 [2021-12-15 21:51:29,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:29,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 131 [2021-12-15 21:51:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 54 [2021-12-15 21:51:29,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 21:51:29,606 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 123 treesize of output 108 [2021-12-15 21:51:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:29,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 146 [2021-12-15 21:51:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 72 [2021-12-15 21:51:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 53 [2021-12-15 21:51:29,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:29,938 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 54 treesize of output 56 [2021-12-15 21:51:30,075 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 21:51:30,076 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 175 treesize of output 155 [2021-12-15 21:51:30,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 156 [2021-12-15 21:51:30,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 21:51:30,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-15 21:51:30,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 65 [2021-12-15 21:51:30,330 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-15 21:51:30,331 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 224 treesize of output 198 [2021-12-15 21:51:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 199 [2021-12-15 21:51:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 157 [2021-12-15 21:51:30,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:30,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:30,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:51:30,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:51:30,581 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-12-15 21:51:30,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 113 treesize of output 96 [2021-12-15 21:51:30,883 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-12-15 21:51:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 123 treesize of output 55 [2021-12-15 21:51:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:51:30,909 INFO L328 TraceCheckSpWp]: Computing backward predicates...