./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sqm.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/sqm.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 950fd5ff5cc9d2c5e3d846192e43f4963ef3abd0ec7056eb5d764989d48b2064 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:35:05,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:35:05,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:35:05,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:35:05,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:35:05,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:35:05,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:35:05,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:35:05,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:35:05,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:35:05,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:35:05,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:35:05,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:35:05,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:35:05,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:35:05,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:35:05,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:35:05,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:35:05,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:35:05,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:35:05,483 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:35:05,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:35:05,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:35:05,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:35:05,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:35:05,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:35:05,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:35:05,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:35:05,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:35:05,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:35:05,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:35:05,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:35:05,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:35:05,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:35:05,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:35:05,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:35:05,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:35:05,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:35:05,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:35:05,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:35:05,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:35:05,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:35:05,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:35:05,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:35:05,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:35:05,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:35:05,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:35:05,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:35:05,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:35:05,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:35:05,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:35:05,519 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:35:05,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:35:05,519 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:35:05,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:35:05,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:35:05,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:35:05,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:35:05,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:35:05,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:35:05,520 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:35:05,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:35:05,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:35:05,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:35:05,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:35:05,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:35:05,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:35:05,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:35:05,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:35:05,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:35:05,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:35:05,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:35:05,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:35:05,523 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:35:05,523 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:35:05,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:35:05,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 950fd5ff5cc9d2c5e3d846192e43f4963ef3abd0ec7056eb5d764989d48b2064 [2022-07-11 23:35:05,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:35:05,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:35:05,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:35:05,701 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:35:05,701 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:35:05,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqm.c [2022-07-11 23:35:05,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb89c5ba4/834d2ba5aaf4424ba4a9bace94454ff7/FLAG53a46db41 [2022-07-11 23:35:06,099 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:35:06,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm.c [2022-07-11 23:35:06,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb89c5ba4/834d2ba5aaf4424ba4a9bace94454ff7/FLAG53a46db41 [2022-07-11 23:35:06,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb89c5ba4/834d2ba5aaf4424ba4a9bace94454ff7 [2022-07-11 23:35:06,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:35:06,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:35:06,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:35:06,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:35:06,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:35:06,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7213ebcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06, skipping insertion in model container [2022-07-11 23:35:06,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:35:06,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:35:06,277 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/sqm.c[586,599] [2022-07-11 23:35:06,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:35:06,307 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:35:06,320 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/sqm.c[586,599] [2022-07-11 23:35:06,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:35:06,343 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:35:06,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06 WrapperNode [2022-07-11 23:35:06,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:35:06,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:35:06,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:35:06,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:35:06,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,381 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-07-11 23:35:06,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:35:06,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:35:06,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:35:06,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:35:06,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:35:06,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:35:06,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:35:06,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:35:06,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (1/1) ... [2022-07-11 23:35:06,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:35:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:06,440 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) [2022-07-11 23:35:06,479 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 [2022-07-11 23:35:06,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:35:06,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:35:06,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:35:06,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:35:06,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:35:06,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:35:06,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:35:06,534 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:35:06,535 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:35:06,712 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:35:06,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:35:06,719 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 23:35:06,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:35:06 BoogieIcfgContainer [2022-07-11 23:35:06,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:35:06,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:35:06,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:35:06,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:35:06,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:35:06" (1/3) ... [2022-07-11 23:35:06,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1947e349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:35:06, skipping insertion in model container [2022-07-11 23:35:06,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:35:06" (2/3) ... [2022-07-11 23:35:06,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1947e349 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:35:06, skipping insertion in model container [2022-07-11 23:35:06,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:35:06" (3/3) ... [2022-07-11 23:35:06,740 INFO L111 eAbstractionObserver]: Analyzing ICFG sqm.c [2022-07-11 23:35:06,749 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:35:06,749 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:35:06,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:35:06,811 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b07ad66, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@51a77204 [2022-07-11 23:35:06,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:35:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:35:06,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:06,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:06,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:06,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-07-11 23:35:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:06,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132692403] [2022-07-11 23:35:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132692403] [2022-07-11 23:35:06,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132692403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:35:06,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:35:06,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:35:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658350469] [2022-07-11 23:35:06,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:35:06,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:35:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:35:06,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:35:07,000 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-07-11 23:35:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:07,013 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-11 23:35:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:35:07,014 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 [2022-07-11 23:35:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:07,020 INFO L225 Difference]: With dead ends: 38 [2022-07-11 23:35:07,021 INFO L226 Difference]: Without dead ends: 17 [2022-07-11 23:35:07,023 INFO L412 NwaCegarLoop]: 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 [2022-07-11 23:35:07,026 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:07,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:35:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-11 23:35:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-11 23:35:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-11 23:35:07,051 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-11 23:35:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:07,052 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-11 23:35:07,052 INFO L496 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) [2022-07-11 23:35:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-11 23:35:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 23:35:07,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:07,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:07,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:35:07,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-07-11 23:35:07,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:07,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145815376] [2022-07-11 23:35:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:07,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:07,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:07,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131818316] [2022-07-11 23:35:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:07,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:07,102 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) [2022-07-11 23:35:07,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:35:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:07,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 23:35:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:07,243 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-11 23:35:07,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-11 23:35:07,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:07,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:07,369 INFO L390 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 16 treesize of output 5 [2022-07-11 23:35:07,372 INFO L390 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 5 treesize of output 3 [2022-07-11 23:35:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:07,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:35:07,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145815376] [2022-07-11 23:35:07,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131818316] [2022-07-11 23:35:07,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131818316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:35:07,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:35:07,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:35:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704100909] [2022-07-11 23:35:07,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:35:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:35:07,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:35:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:35:07,434 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-11 23:35:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:07,540 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-11 23:35:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:35:07,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2022-07-11 23:35:07,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:07,543 INFO L225 Difference]: With dead ends: 34 [2022-07-11 23:35:07,543 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 23:35:07,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:35:07,544 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:07,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:35:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 23:35:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-11 23:35:07,551 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) [2022-07-11 23:35:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-11 23:35:07,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-07-11 23:35:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:07,552 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-11 23:35:07,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-07-11 23:35:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-11 23:35:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 23:35:07,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:07,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:07,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:07,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:07,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2022-07-11 23:35:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962782475] [2022-07-11 23:35:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:07,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:07,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:07,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835515849] [2022-07-11 23:35:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:07,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:07,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:07,788 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) [2022-07-11 23:35:07,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:35:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:07,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 23:35:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:07,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:35:07,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962782475] [2022-07-11 23:35:07,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835515849] [2022-07-11 23:35:07,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835515849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:35:07,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:35:07,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:35:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886276644] [2022-07-11 23:35:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:35:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:35:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:35:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:35:07,867 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-11 23:35:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:07,926 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-11 23:35:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:35:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2022-07-11 23:35:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:07,928 INFO L225 Difference]: With dead ends: 49 [2022-07-11 23:35:07,928 INFO L226 Difference]: Without dead ends: 40 [2022-07-11 23:35:07,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:35:07,929 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:07,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:35:07,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-11 23:35:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-07-11 23:35:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-07-11 23:35:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-11 23:35:07,936 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-07-11 23:35:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:07,937 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-11 23:35:07,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-07-11 23:35:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-11 23:35:07,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 23:35:07,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:07,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:07,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:08,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-11 23:35:08,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:08,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-07-11 23:35:08,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:08,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943555544] [2022-07-11 23:35:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:08,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:08,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:08,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466481990] [2022-07-11 23:35:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:08,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:08,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:08,167 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) [2022-07-11 23:35:08,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:35:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 23:35:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:08,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:08,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943555544] [2022-07-11 23:35:08,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466481990] [2022-07-11 23:35:08,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466481990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:08,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:08,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-11 23:35:08,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100121713] [2022-07-11 23:35:08,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:08,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:35:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:35:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:35:08,262 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-11 23:35:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:08,335 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-11 23:35:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:35:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 14 [2022-07-11 23:35:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:08,336 INFO L225 Difference]: With dead ends: 44 [2022-07-11 23:35:08,336 INFO L226 Difference]: Without dead ends: 37 [2022-07-11 23:35:08,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:35:08,337 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:08,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:35:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-11 23:35:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-07-11 23:35:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2022-07-11 23:35:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-11 23:35:08,357 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-07-11 23:35:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:08,357 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-11 23:35:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-11 23:35:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-11 23:35:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-11 23:35:08,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:08,358 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:08,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-11 23:35:08,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:08,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2022-07-11 23:35:08,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:08,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053562698] [2022-07-11 23:35:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:08,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:08,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:08,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403499742] [2022-07-11 23:35:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:08,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:08,578 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) [2022-07-11 23:35:08,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:35:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 23:35:08,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:08,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:35:08,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053562698] [2022-07-11 23:35:08,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403499742] [2022-07-11 23:35:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403499742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:35:08,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:35:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-11 23:35:08,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61821159] [2022-07-11 23:35:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:35:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-11 23:35:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-11 23:35:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-11 23:35:08,655 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-11 23:35:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:08,703 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-07-11 23:35:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:35:08,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2022-07-11 23:35:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:08,704 INFO L225 Difference]: With dead ends: 41 [2022-07-11 23:35:08,704 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 23:35:08,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:35:08,705 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:08,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:35:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 23:35:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-11 23:35:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-11 23:35:08,707 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2022-07-11 23:35:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:08,708 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-11 23:35:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-07-11 23:35:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-11 23:35:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-11 23:35:08,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:08,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:08,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:08,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:08,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:08,916 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-07-11 23:35:08,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:08,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103482627] [2022-07-11 23:35:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:08,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:08,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:08,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792686954] [2022-07-11 23:35:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:08,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:08,934 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) [2022-07-11 23:35:08,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:35:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:09,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 23:35:09,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:09,013 INFO L390 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 [2022-07-11 23:35:09,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:09,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-07-11 23:35:09,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:09,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-11 23:35:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:09,069 INFO L390 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 [2022-07-11 23:35:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:09,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:09,245 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-07-11 23:35:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-11 23:35:09,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:09,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103482627] [2022-07-11 23:35:09,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:09,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792686954] [2022-07-11 23:35:09,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792686954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:09,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:09,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-07-11 23:35:09,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915960264] [2022-07-11 23:35:09,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:09,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:35:09,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:35:09,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=64, Unknown=1, NotChecked=16, Total=110 [2022-07-11 23:35:09,269 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-07-11 23:35:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:09,383 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-11 23:35:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:35:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 16 [2022-07-11 23:35:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:09,384 INFO L225 Difference]: With dead ends: 44 [2022-07-11 23:35:09,384 INFO L226 Difference]: Without dead ends: 42 [2022-07-11 23:35:09,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=109, Unknown=1, NotChecked=22, Total=182 [2022-07-11 23:35:09,385 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:09,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 107 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-07-11 23:35:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-11 23:35:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2022-07-11 23:35:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-11 23:35:09,418 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2022-07-11 23:35:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:09,419 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-11 23:35:09,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-07-11 23:35:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-11 23:35:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 23:35:09,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:09,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:09,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:09,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:09,629 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2022-07-11 23:35:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:09,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519944083] [2022-07-11 23:35:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:09,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:09,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762496704] [2022-07-11 23:35:09,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:35:09,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:09,671 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) [2022-07-11 23:35:09,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:35:09,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:35:09,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:35:09,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:35:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:09,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519944083] [2022-07-11 23:35:09,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762496704] [2022-07-11 23:35:09,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762496704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:09,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:09,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-11 23:35:09,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067127603] [2022-07-11 23:35:09,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:09,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:35:09,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:35:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:35:09,771 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-11 23:35:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:09,856 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-07-11 23:35:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:35:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 [2022-07-11 23:35:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:09,857 INFO L225 Difference]: With dead ends: 61 [2022-07-11 23:35:09,857 INFO L226 Difference]: Without dead ends: 52 [2022-07-11 23:35:09,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:35:09,858 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:09,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:35:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-11 23:35:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2022-07-11 23:35:09,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-07-11 23:35:09,862 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2022-07-11 23:35:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:09,862 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-07-11 23:35:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-11 23:35:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-07-11 23:35:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 23:35:09,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:09,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:09,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:10,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:10,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2022-07-11 23:35:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116314233] [2022-07-11 23:35:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:10,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:10,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606960918] [2022-07-11 23:35:10,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:35:10,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:10,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:10,105 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) [2022-07-11 23:35:10,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:35:10,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:35:10,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:35:10,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:35:10,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:10,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:10,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:10,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116314233] [2022-07-11 23:35:10,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:10,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606960918] [2022-07-11 23:35:10,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606960918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:10,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:10,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-07-11 23:35:10,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793345742] [2022-07-11 23:35:10,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:10,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:35:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:35:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:35:10,228 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-11 23:35:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:10,335 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-07-11 23:35:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:35:10,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 [2022-07-11 23:35:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:10,336 INFO L225 Difference]: With dead ends: 56 [2022-07-11 23:35:10,336 INFO L226 Difference]: Without dead ends: 49 [2022-07-11 23:35:10,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:35:10,337 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:10,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:35:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-11 23:35:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2022-07-11 23:35:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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) [2022-07-11 23:35:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-07-11 23:35:10,340 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2022-07-11 23:35:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:10,340 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-07-11 23:35:10,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-07-11 23:35:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-07-11 23:35:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-11 23:35:10,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:10,341 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:10,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:10,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:10,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-07-11 23:35:10,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:10,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490261296] [2022-07-11 23:35:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:10,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:10,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598987667] [2022-07-11 23:35:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:10,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:10,580 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) [2022-07-11 23:35:10,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:35:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:35:10,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-11 23:35:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:10,676 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-11 23:35:10,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-07-11 23:35:10,697 INFO L356 Elim1Store]: treesize reduction 39, result has 26.4 percent of original size [2022-07-11 23:35:10,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 67 [2022-07-11 23:35:10,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:10,722 INFO L390 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 5 treesize of output 3 [2022-07-11 23:35:10,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:35:10,740 INFO L390 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-11 23:35:10,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:10,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:10,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 17 treesize of output 36 [2022-07-11 23:35:10,786 INFO L390 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 [2022-07-11 23:35:10,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:10,821 INFO L390 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 [2022-07-11 23:35:10,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:10,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 46 treesize of output 43 [2022-07-11 23:35:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:11,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:11,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490261296] [2022-07-11 23:35:11,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598987667] [2022-07-11 23:35:11,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598987667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:11,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:11,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-11 23:35:11,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31934893] [2022-07-11 23:35:11,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:11,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:35:11,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:35:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:35:11,549 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2022-07-11 23:35:25,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-11 23:35:51,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 13.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-07-11 23:35:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:52,297 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-07-11 23:35:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 23:35:52,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 20 [2022-07-11 23:35:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:52,299 INFO L225 Difference]: With dead ends: 76 [2022-07-11 23:35:52,299 INFO L226 Difference]: Without dead ends: 74 [2022-07-11 23:35:52,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=170, Invalid=531, Unknown=1, NotChecked=0, Total=702 [2022-07-11 23:35:52,300 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:52,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 118 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 141 Invalid, 2 Unknown, 35 Unchecked, 26.6s Time] [2022-07-11 23:35:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-11 23:35:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2022-07-11 23:35:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:35:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-07-11 23:35:52,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2022-07-11 23:35:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:52,305 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-07-11 23:35:52,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2022-07-11 23:35:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-07-11 23:35:52,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-11 23:35:52,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:52,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:52,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:52,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-11 23:35:52,507 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2022-07-11 23:35:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:52,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858258305] [2022-07-11 23:35:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:52,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:52,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67114904] [2022-07-11 23:35:52,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:35:52,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:52,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:52,554 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) [2022-07-11 23:35:52,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:35:52,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:35:52,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:35:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-11 23:35:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:52,749 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-11 23:35:52,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-11 23:35:52,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:52,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:35:52,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-07-11 23:35:52,797 INFO L390 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 5 treesize of output 3 [2022-07-11 23:35:52,800 INFO L390 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 [2022-07-11 23:35:52,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-11 23:35:52,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-11 23:35:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:35:52,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:35:52,899 INFO L390 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 [2022-07-11 23:35:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:35:52,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:53,110 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_305 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_305) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-07-11 23:35:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-07-11 23:35:53,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:53,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858258305] [2022-07-11 23:35:53,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:53,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67114904] [2022-07-11 23:35:53,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67114904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:53,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:53,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-11 23:35:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547152581] [2022-07-11 23:35:53,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:35:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:35:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=129, Unknown=1, NotChecked=24, Total=210 [2022-07-11 23:35:53,123 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2022-07-11 23:35:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:53,366 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2022-07-11 23:35:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:35:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 20 [2022-07-11 23:35:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:53,367 INFO L225 Difference]: With dead ends: 104 [2022-07-11 23:35:53,367 INFO L226 Difference]: Without dead ends: 102 [2022-07-11 23:35:53,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=443, Unknown=1, NotChecked=46, Total=650 [2022-07-11 23:35:53,368 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:53,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 127 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 92 Invalid, 0 Unknown, 158 Unchecked, 0.1s Time] [2022-07-11 23:35:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-11 23:35:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 47. [2022-07-11 23:35:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 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) [2022-07-11 23:35:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-11 23:35:53,379 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 20 [2022-07-11 23:35:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:53,379 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-11 23:35:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2022-07-11 23:35:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-11 23:35:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 23:35:53,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:53,381 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:53,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:53,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 23:35:53,592 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2022-07-11 23:35:53,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:53,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532671416] [2022-07-11 23:35:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:53,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:53,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768038616] [2022-07-11 23:35:53,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:35:53,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:53,605 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) [2022-07-11 23:35:53,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:35:53,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:35:53,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:35:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 23:35:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:35:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:35:53,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:35:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 23:35:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:35:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532671416] [2022-07-11 23:35:53,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:35:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768038616] [2022-07-11 23:35:53,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768038616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:35:53,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:35:53,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-11 23:35:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405451665] [2022-07-11 23:35:53,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:35:53,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:35:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:35:53,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:35:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:35:53,754 INFO L87 Difference]: Start difference. First operand 47 states and 54 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) [2022-07-11 23:35:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:35:53,870 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-07-11 23:35:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-11 23:35:53,871 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 [2022-07-11 23:35:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:35:53,871 INFO L225 Difference]: With dead ends: 77 [2022-07-11 23:35:53,871 INFO L226 Difference]: Without dead ends: 57 [2022-07-11 23:35:53,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:35:53,872 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:35:53,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:35:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-11 23:35:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-07-11 23:35:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-07-11 23:35:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-11 23:35:53,877 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 24 [2022-07-11 23:35:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:35:53,877 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-11 23:35:53,877 INFO L496 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) [2022-07-11 23:35:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-11 23:35:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 23:35:53,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:35:53,878 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:35:53,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:35:54,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-11 23:35:54,088 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:35:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:35:54,088 INFO L85 PathProgramCache]: Analyzing trace with hash -900609774, now seen corresponding path program 5 times [2022-07-11 23:35:54,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:35:54,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004353296] [2022-07-11 23:35:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:35:54,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:35:54,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:35:54,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797431973] [2022-07-11 23:35:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:35:54,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:35:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:35:54,107 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) [2022-07-11 23:35:54,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:36:57,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 23:36:57,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:36:57,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:36:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:36:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:36:57,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:36:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:36:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:36:57,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004353296] [2022-07-11 23:36:57,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:36:57,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797431973] [2022-07-11 23:36:57,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797431973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:36:57,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:36:57,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:36:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603408631] [2022-07-11 23:36:57,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:36:57,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:36:57,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:36:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:36:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:36:57,258 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:36:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:36:57,375 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-07-11 23:36:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:36:57,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-11 23:36:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:36:57,376 INFO L225 Difference]: With dead ends: 90 [2022-07-11 23:36:57,376 INFO L226 Difference]: Without dead ends: 76 [2022-07-11 23:36:57,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:36:57,376 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:36:57,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 56 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:36:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-11 23:36:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2022-07-11 23:36:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2022-07-11 23:36:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-07-11 23:36:57,381 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2022-07-11 23:36:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:36:57,381 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-07-11 23:36:57,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:36:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-07-11 23:36:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-11 23:36:57,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:36:57,382 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:36:57,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:36:57,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 23:36:57,583 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:36:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:36:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 149788298, now seen corresponding path program 3 times [2022-07-11 23:36:57,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:36:57,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665754854] [2022-07-11 23:36:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:36:57,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:36:57,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:36:57,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161472056] [2022-07-11 23:36:57,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:36:57,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:36:57,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:36:57,608 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) [2022-07-11 23:36:57,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:36:57,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 23:36:57,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:36:57,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:36:57,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:36:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:36:57,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:36:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-11 23:36:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:36:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665754854] [2022-07-11 23:36:57,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:36:57,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161472056] [2022-07-11 23:36:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161472056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:36:57,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:36:57,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-11 23:36:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087843860] [2022-07-11 23:36:57,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:36:57,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:36:57,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:36:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:36:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:36:57,863 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2022-07-11 23:36:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:36:58,041 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-07-11 23:36:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 23:36:58,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) Word has length 26 [2022-07-11 23:36:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:36:58,042 INFO L225 Difference]: With dead ends: 78 [2022-07-11 23:36:58,042 INFO L226 Difference]: Without dead ends: 69 [2022-07-11 23:36:58,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:36:58,043 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:36:58,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:36:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-11 23:36:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2022-07-11 23:36:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:36:58,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-07-11 23:36:58,047 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2022-07-11 23:36:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:36:58,047 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-07-11 23:36:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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) [2022-07-11 23:36:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-07-11 23:36:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-11 23:36:58,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:36:58,048 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:36:58,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:36:58,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 23:36:58,259 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:36:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:36:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1983767408, now seen corresponding path program 6 times [2022-07-11 23:36:58,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:36:58,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422188315] [2022-07-11 23:36:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:36:58,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:36:58,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:36:58,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732080274] [2022-07-11 23:36:58,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:36:58,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:36:58,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:36:58,288 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) [2022-07-11 23:36:58,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:36:58,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:36:58,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:36:58,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:36:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:36:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:36:58,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:36:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:36:58,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:36:58,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422188315] [2022-07-11 23:36:58,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:36:58,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732080274] [2022-07-11 23:36:58,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732080274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:36:58,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:36:58,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-07-11 23:36:58,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026789122] [2022-07-11 23:36:58,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:36:58,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 23:36:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:36:58,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 23:36:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:36:58,598 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2022-07-11 23:36:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:36:58,844 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2022-07-11 23:36:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 23:36:58,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 26 [2022-07-11 23:36:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:36:58,845 INFO L225 Difference]: With dead ends: 115 [2022-07-11 23:36:58,845 INFO L226 Difference]: Without dead ends: 103 [2022-07-11 23:36:58,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2022-07-11 23:36:58,846 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 187 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:36:58,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 78 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:36:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-11 23:36:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 59. [2022-07-11 23:36:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 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) [2022-07-11 23:36:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-07-11 23:36:58,854 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 26 [2022-07-11 23:36:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:36:58,854 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-07-11 23:36:58,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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) [2022-07-11 23:36:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-07-11 23:36:58,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:36:58,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:36:58,856 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:36:58,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:36:59,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 23:36:59,072 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:36:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:36:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 4 times [2022-07-11 23:36:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:36:59,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630717915] [2022-07-11 23:36:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:36:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:36:59,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:36:59,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798761111] [2022-07-11 23:36:59,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:36:59,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:36:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:36:59,108 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:36:59,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:36:59,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:36:59,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:36:59,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-11 23:36:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:36:59,299 INFO L390 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 [2022-07-11 23:36:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-11 23:36:59,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:36:59,311 INFO L390 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 [2022-07-11 23:36:59,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 109 [2022-07-11 23:36:59,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:36:59,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,346 INFO L390 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 98 treesize of output 172 [2022-07-11 23:36:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 44 [2022-07-11 23:36:59,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 163 [2022-07-11 23:36:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:36:59,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,510 INFO L390 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 125 treesize of output 199 [2022-07-11 23:36:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 108 treesize of output 39 [2022-07-11 23:36:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:36:59,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:36:59,635 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-11 23:36:59,635 INFO L390 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 74 treesize of output 60 [2022-07-11 23:36:59,876 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-11 23:36:59,876 INFO L390 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 74 treesize of output 42 [2022-07-11 23:36:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:36:59,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:37:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:37:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:37:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630717915] [2022-07-11 23:37:10,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:37:10,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798761111] [2022-07-11 23:37:10,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798761111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:37:10,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:37:10,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-07-11 23:37:10,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263207400] [2022-07-11 23:37:10,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:37:10,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:37:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:37:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:37:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:37:10,268 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-07-11 23:37:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:37:12,382 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-07-11 23:37:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 23:37:12,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 [2022-07-11 23:37:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:37:12,383 INFO L225 Difference]: With dead ends: 61 [2022-07-11 23:37:12,383 INFO L226 Difference]: Without dead ends: 42 [2022-07-11 23:37:12,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-07-11 23:37:12,384 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:37:12,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-07-11 23:37:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-11 23:37:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-11 23:37:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:37:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-11 23:37:12,409 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2022-07-11 23:37:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:37:12,409 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-11 23:37:12,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2022-07-11 23:37:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-11 23:37:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:37:12,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:37:12,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:37:12,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-11 23:37:12,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:37:12,613 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:37:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:37:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 5 times [2022-07-11 23:37:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:37:12,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654211237] [2022-07-11 23:37:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:37:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:37:12,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:37:12,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663095836] [2022-07-11 23:37:12,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:37:12,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:37:12,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:37:12,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:37:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 23:37:47,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-11 23:37:47,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:37:47,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-11 23:37:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:37:47,166 INFO L390 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 [2022-07-11 23:37:47,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-11 23:37:47,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-07-11 23:37:47,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:37:47,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:37:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,213 INFO L390 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 32 treesize of output 34 [2022-07-11 23:37:47,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,250 INFO L390 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 32 treesize of output 34 [2022-07-11 23:37:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,283 INFO L390 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 28 treesize of output 30 [2022-07-11 23:37:47,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 129 [2022-07-11 23:37:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:37:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,334 INFO L390 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 122 treesize of output 196 [2022-07-11 23:37:47,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 104 [2022-07-11 23:37:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 48 [2022-07-11 23:37:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:47,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 44 [2022-07-11 23:37:47,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2022-07-11 23:37:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:37:47,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:37:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:37:57,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:37:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654211237] [2022-07-11 23:37:57,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:37:57,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663095836] [2022-07-11 23:37:57,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663095836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:37:57,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:37:57,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2022-07-11 23:37:57,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693084474] [2022-07-11 23:37:57,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:37:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 23:37:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:37:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 23:37:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-07-11 23:37:57,423 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-07-11 23:37:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:37:57,973 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-07-11 23:37:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 23:37:57,974 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 [2022-07-11 23:37:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:37:57,974 INFO L225 Difference]: With dead ends: 69 [2022-07-11 23:37:57,974 INFO L226 Difference]: Without dead ends: 67 [2022-07-11 23:37:57,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-07-11 23:37:57,975 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:37:57,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-07-11 23:37:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-11 23:37:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-07-11 23:37:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 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) [2022-07-11 23:37:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-07-11 23:37:57,981 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 28 [2022-07-11 23:37:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:37:57,981 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-07-11 23:37:57,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-07-11 23:37:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-07-11 23:37:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 23:37:57,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:37:57,982 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:37:58,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:37:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-11 23:37:58,194 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:37:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:37:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 7 times [2022-07-11 23:37:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:37:58,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898370060] [2022-07-11 23:37:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:37:58,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:37:58,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:37:58,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323306939] [2022-07-11 23:37:58,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:37:58,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:37:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:37:58,219 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:37:58,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 23:37:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:37:58,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-11 23:37:58,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:37:58,992 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-07-11 23:37:58,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-07-11 23:37:58,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:37:59,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:37:59,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-07-11 23:37:59,027 INFO L390 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 5 treesize of output 3 [2022-07-11 23:37:59,036 INFO L390 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 [2022-07-11 23:37:59,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-11 23:37:59,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-11 23:37:59,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-11 23:37:59,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-11 23:37:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:59,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:37:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:59,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:37:59,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:59,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 23:37:59,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:37:59,239 INFO L390 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 [2022-07-11 23:37:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:37:59,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:37:59,910 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_659 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_659) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-07-11 23:37:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 7 not checked. [2022-07-11 23:37:59,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:37:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898370060] [2022-07-11 23:37:59,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:37:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323306939] [2022-07-11 23:37:59,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323306939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:37:59,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:37:59,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-07-11 23:37:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556590054] [2022-07-11 23:37:59,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:37:59,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 23:37:59,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:37:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 23:37:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=322, Unknown=1, NotChecked=40, Total=506 [2022-07-11 23:37:59,925 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:38:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:38:00,406 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2022-07-11 23:38:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 23:38:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-11 23:38:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:38:00,407 INFO L225 Difference]: With dead ends: 111 [2022-07-11 23:38:00,407 INFO L226 Difference]: Without dead ends: 109 [2022-07-11 23:38:00,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=789, Unknown=1, NotChecked=62, Total=1122 [2022-07-11 23:38:00,408 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:38:00,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 108 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 152 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-07-11 23:38:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-11 23:38:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 67. [2022-07-11 23:38:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 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) [2022-07-11 23:38:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-11 23:38:00,414 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 28 [2022-07-11 23:38:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:38:00,414 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-11 23:38:00,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:38:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-11 23:38:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 23:38:00,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:38:00,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:38:00,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 23:38:00,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-11 23:38:00,622 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:38:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:38:00,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 6 times [2022-07-11 23:38:00,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:38:00,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109850171] [2022-07-11 23:38:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:38:00,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:38:00,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:38:00,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498034430] [2022-07-11 23:38:00,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:38:00,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:38:00,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:38:00,640 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:38:00,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 23:38:01,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-11 23:38:01,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:38:01,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-11 23:38:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:38:01,198 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-07-11 23:38:01,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-07-11 23:38:01,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-07-11 23:38:01,224 INFO L356 Elim1Store]: treesize reduction 34, result has 34.6 percent of original size [2022-07-11 23:38:01,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 70 [2022-07-11 23:38:01,249 INFO L390 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 28 treesize of output 16 [2022-07-11 23:38:01,253 INFO L390 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 16 treesize of output 12 [2022-07-11 23:38:01,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:38:01,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-07-11 23:38:01,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:38:01,309 INFO L390 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 [2022-07-11 23:38:01,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 109 [2022-07-11 23:38:01,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:01,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,365 INFO L390 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 98 treesize of output 172 [2022-07-11 23:38:01,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 84 [2022-07-11 23:38:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 50 [2022-07-11 23:38:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-07-11 23:38:01,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 139 [2022-07-11 23:38:01,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,764 INFO L390 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 125 treesize of output 199 [2022-07-11 23:38:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 115 [2022-07-11 23:38:01,967 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-11 23:38:01,967 INFO L390 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 196 treesize of output 176 [2022-07-11 23:38:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:01,979 INFO L390 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 238 [2022-07-11 23:38:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 60 [2022-07-11 23:38:02,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:02,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:02,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:02,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:02,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:02,203 INFO L356 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-07-11 23:38:02,204 INFO L390 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 21 case distinctions, treesize of input 127 treesize of output 120 [2022-07-11 23:38:02,782 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-11 23:38:02,783 INFO L390 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 89 treesize of output 45 [2022-07-11 23:38:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:38:02,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:38:12,503 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 105 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:38:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:38:14,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:38:14,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109850171] [2022-07-11 23:38:14,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 23:38:14,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498034430] [2022-07-11 23:38:14,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498034430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:38:14,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:38:14,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2022-07-11 23:38:14,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847232189] [2022-07-11 23:38:14,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:38:14,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-11 23:38:14,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:38:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-11 23:38:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2022-07-11 23:38:14,231 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:38:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:38:24,012 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2022-07-11 23:38:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-11 23:38:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-11 23:38:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:38:24,014 INFO L225 Difference]: With dead ends: 110 [2022-07-11 23:38:24,014 INFO L226 Difference]: Without dead ends: 108 [2022-07-11 23:38:24,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=679, Invalid=3102, Unknown=1, NotChecked=0, Total=3782 [2022-07-11 23:38:24,015 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:38:24,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 173 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 191 Invalid, 0 Unknown, 322 Unchecked, 0.4s Time] [2022-07-11 23:38:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-11 23:38:24,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2022-07-11 23:38:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.15625) internal successors, (111), 96 states have internal predecessors, (111), 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) [2022-07-11 23:38:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2022-07-11 23:38:24,028 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 32 [2022-07-11 23:38:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:38:24,028 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2022-07-11 23:38:24,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:38:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2022-07-11 23:38:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 23:38:24,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:38:24,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:38:24,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 23:38:24,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-11 23:38:24,230 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:38:24,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:38:24,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1910230140, now seen corresponding path program 7 times [2022-07-11 23:38:24,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:38:24,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219161108] [2022-07-11 23:38:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:38:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:38:24,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 23:38:24,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940728271] [2022-07-11 23:38:24,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:38:24,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:38:24,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:38:24,243 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:38:24,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 23:38:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:38:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-11 23:38:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:38:24,983 INFO L390 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 [2022-07-11 23:38:24,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:24,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-07-11 23:38:24,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-07-11 23:38:24,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:38:24,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-11 23:38:25,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 109 [2022-07-11 23:38:25,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:25,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,030 INFO L390 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 98 treesize of output 172 [2022-07-11 23:38:25,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 208 [2022-07-11 23:38:25,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,142 INFO L390 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 131 treesize of output 203 [2022-07-11 23:38:25,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-11 23:38:25,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 129 [2022-07-11 23:38:25,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 204 [2022-07-11 23:38:25,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 72 [2022-07-11 23:38:25,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 178 [2022-07-11 23:38:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:25,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,589 INFO L390 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 125 treesize of output 199 [2022-07-11 23:38:25,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 225 [2022-07-11 23:38:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,833 INFO L390 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 155 treesize of output 237 [2022-07-11 23:38:25,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:25,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 60 [2022-07-11 23:38:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,073 INFO L356 Elim1Store]: treesize reduction 63, result has 10.0 percent of original size [2022-07-11 23:38:26,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 153 treesize of output 155 [2022-07-11 23:38:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:38:26,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:38:26,238 INFO L356 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-07-11 23:38:26,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 111 treesize of output 105 [2022-07-11 23:38:26,536 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-11 23:38:26,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 56 [2022-07-11 23:38:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:38:26,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:39:20,429 WARN L233 SmtUtils]: Spent 21.06s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)