./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/eqn3.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 b0fb0070f46fa34e60f2a21833c13b7b67c557f142ffbdfed9bc8ff3d84f7456 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 18:57:45,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 18:57:45,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 18:57:45,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 18:57:45,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 18:57:45,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 18:57:45,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 18:57:45,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 18:57:45,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 18:57:45,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 18:57:45,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 18:57:45,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 18:57:45,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 18:57:45,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 18:57:45,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 18:57:45,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 18:57:45,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 18:57:45,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 18:57:45,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 18:57:45,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 18:57:45,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 18:57:45,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 18:57:45,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 18:57:45,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 18:57:45,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 18:57:45,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 18:57:45,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 18:57:45,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 18:57:45,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 18:57:45,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 18:57:45,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 18:57:45,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 18:57:45,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 18:57:45,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 18:57:45,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 18:57:45,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 18:57:45,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 18:57:45,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 18:57:45,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 18:57:45,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 18:57:45,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 18:57:45,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 18:57:45,571 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 18:57:45,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 18:57:45,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 18:57:45,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 18:57:45,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 18:57:45,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 18:57:45,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 18:57:45,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 18:57:45,574 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 18:57:45,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 18:57:45,575 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 18:57:45,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 18:57:45,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 18:57:45,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 18:57:45,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 18:57:45,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 18:57:45,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 18:57:45,576 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 18:57:45,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 18:57:45,576 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 18:57:45,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 18:57:45,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 18:57:45,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 18:57:45,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 18:57:45,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:57:45,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 18:57:45,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 18:57:45,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 18:57:45,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 18:57:45,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 18:57:45,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 18:57:45,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 18:57:45,579 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 18:57:45,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 18:57:45,579 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 18:57:45,579 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0fb0070f46fa34e60f2a21833c13b7b67c557f142ffbdfed9bc8ff3d84f7456 [2023-02-15 18:57:45,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 18:57:45,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 18:57:45,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 18:57:45,817 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 18:57:45,817 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 18:57:45,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn3.c [2023-02-15 18:57:46,782 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 18:57:46,983 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 18:57:46,984 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3.c [2023-02-15 18:57:46,988 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276c92d9b/9a3d1501dfd8446c82d94461fffc50b7/FLAG8196d98f5 [2023-02-15 18:57:47,000 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/276c92d9b/9a3d1501dfd8446c82d94461fffc50b7 [2023-02-15 18:57:47,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 18:57:47,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 18:57:47,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 18:57:47,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 18:57:47,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 18:57:47,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2ae149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47, skipping insertion in model container [2023-02-15 18:57:47,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 18:57:47,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 18:57:47,125 WARN L237 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/eqn3.c[587,600] [2023-02-15 18:57:47,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:57:47,146 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 18:57:47,154 WARN L237 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/eqn3.c[587,600] [2023-02-15 18:57:47,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 18:57:47,172 INFO L208 MainTranslator]: Completed translation [2023-02-15 18:57:47,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47 WrapperNode [2023-02-15 18:57:47,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 18:57:47,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 18:57:47,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 18:57:47,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 18:57:47,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,206 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-15 18:57:47,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 18:57:47,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 18:57:47,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 18:57:47,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 18:57:47,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 18:57:47,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 18:57:47,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 18:57:47,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 18:57:47,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (1/1) ... [2023-02-15 18:57:47,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 18:57:47,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:47,252 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) [2023-02-15 18:57:47,257 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 [2023-02-15 18:57:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 18:57:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 18:57:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 18:57:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 18:57:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 18:57:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 18:57:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 18:57:47,339 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 18:57:47,340 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 18:57:47,463 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 18:57:47,468 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 18:57:47,469 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 18:57:47,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:57:47 BoogieIcfgContainer [2023-02-15 18:57:47,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 18:57:47,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 18:57:47,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 18:57:47,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 18:57:47,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 06:57:47" (1/3) ... [2023-02-15 18:57:47,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd45ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:57:47, skipping insertion in model container [2023-02-15 18:57:47,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 06:57:47" (2/3) ... [2023-02-15 18:57:47,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd45ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 06:57:47, skipping insertion in model container [2023-02-15 18:57:47,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 06:57:47" (3/3) ... [2023-02-15 18:57:47,477 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn3.c [2023-02-15 18:57:47,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 18:57:47,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 18:57:47,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 18:57:47,533 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1c861992, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 18:57:47,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 18:57:47,536 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) [2023-02-15 18:57:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 18:57:47,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:47,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:47,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:47,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-15 18:57:47,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:47,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502132510] [2023-02-15 18:57:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:47,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:47,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:47,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502132510] [2023-02-15 18:57:47,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 18:57:47,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163528006] [2023-02-15 18:57:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:47,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:47,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:47,669 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) [2023-02-15 18:57:47,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 18:57:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:47,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 18:57:47,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:47,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:57:47,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163528006] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:57:47,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:57:47,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 18:57:47,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366785270] [2023-02-15 18:57:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:57:47,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 18:57:47,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 18:57:47,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:57:47,878 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) [2023-02-15 18:57:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:47,891 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-15 18:57:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 18:57:47,894 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 [2023-02-15 18:57:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:47,901 INFO L225 Difference]: With dead ends: 38 [2023-02-15 18:57:47,901 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 18:57:47,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 18:57:47,908 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 [2023-02-15 18:57:47,910 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] [2023-02-15 18:57:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 18:57:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 18:57:47,934 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) [2023-02-15 18:57:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-15 18:57:47,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-15 18:57:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:47,938 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-15 18:57:47,938 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) [2023-02-15 18:57:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-15 18:57:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 18:57:47,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:47,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:47,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:48,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 18:57:48,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-15 18:57:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:48,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167846066] [2023-02-15 18:57:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:48,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:48,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994300455] [2023-02-15 18:57:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:48,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:48,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:48,206 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) [2023-02-15 18:57:48,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 18:57:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:48,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 18:57:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:48,472 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-15 18:57:48,473 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:48,487 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:48,508 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:48,586 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-02-15 18:57:48,587 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 38 treesize of output 19 [2023-02-15 18:57:48,594 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:48,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:57:48,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167846066] [2023-02-15 18:57:48,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:48,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994300455] [2023-02-15 18:57:48,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994300455] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:57:48,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:57:48,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 18:57:48,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448760413] [2023-02-15 18:57:48,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:57:48,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 18:57:48,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:48,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 18:57:48,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 18:57:48,664 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2023-02-15 18:57:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:48,765 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-15 18:57:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 18:57:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2023-02-15 18:57:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:48,767 INFO L225 Difference]: With dead ends: 34 [2023-02-15 18:57:48,767 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 18:57:48,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-15 18:57:48,768 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:48,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:57:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 18:57:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-15 18:57:48,774 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) [2023-02-15 18:57:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 18:57:48,774 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2023-02-15 18:57:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:48,775 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 18:57:48,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2023-02-15 18:57:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 18:57:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 18:57:48,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:48,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:48,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:48,981 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,SelfDestructingSolverStorable1 [2023-02-15 18:57:48,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2023-02-15 18:57:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:48,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276450446] [2023-02-15 18:57:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:49,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:49,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122155746] [2023-02-15 18:57:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:49,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:49,009 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) [2023-02-15 18:57:49,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 18:57:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:49,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:57:49,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:49,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:57:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276450446] [2023-02-15 18:57:49,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:49,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122155746] [2023-02-15 18:57:49,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122155746] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:57:49,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:57:49,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 18:57:49,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663322669] [2023-02-15 18:57:49,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:57:49,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 18:57:49,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 18:57:49,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 18:57:49,117 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) [2023-02-15 18:57:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:49,217 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-02-15 18:57:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 18:57:49,218 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 [2023-02-15 18:57:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:49,220 INFO L225 Difference]: With dead ends: 49 [2023-02-15 18:57:49,220 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 18:57:49,221 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 [2023-02-15 18:57:49,229 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:49,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:57:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 18:57:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-02-15 18:57:49,236 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) [2023-02-15 18:57:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-15 18:57:49,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-15 18:57:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:49,238 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-15 18:57:49,238 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) [2023-02-15 18:57:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-15 18:57:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 18:57:49,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:49,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:49,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:49,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:49,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2023-02-15 18:57:49,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:49,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712938814] [2023-02-15 18:57:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:49,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:49,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672961653] [2023-02-15 18:57:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:49,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:49,472 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) [2023-02-15 18:57:49,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 18:57:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:49,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 18:57:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:49,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:57:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:49,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:49,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712938814] [2023-02-15 18:57:49,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:49,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672961653] [2023-02-15 18:57:49,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672961653] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:57:49,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:57:49,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-02-15 18:57:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574133131] [2023-02-15 18:57:49,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:57:49,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 18:57:49,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:49,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 18:57:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 18:57:49,622 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) [2023-02-15 18:57:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:49,719 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-15 18:57:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 18:57:49,719 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 [2023-02-15 18:57:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:49,720 INFO L225 Difference]: With dead ends: 44 [2023-02-15 18:57:49,720 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 18:57:49,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-15 18:57:49,722 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:49,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:57:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 18:57:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-02-15 18:57:49,726 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) [2023-02-15 18:57:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-15 18:57:49,727 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-02-15 18:57:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:49,727 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-15 18:57:49,727 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) [2023-02-15 18:57:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-15 18:57:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 18:57:49,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:49,728 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:49,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:49,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:49,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2023-02-15 18:57:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:49,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137820739] [2023-02-15 18:57:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:49,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:49,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631458283] [2023-02-15 18:57:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:49,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:49,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:49,955 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) [2023-02-15 18:57:49,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 18:57:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 18:57:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:50,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 18:57:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:50,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137820739] [2023-02-15 18:57:50,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631458283] [2023-02-15 18:57:50,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631458283] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 18:57:50,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 18:57:50,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 18:57:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471647249] [2023-02-15 18:57:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 18:57:50,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 18:57:50,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 18:57:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-15 18:57:50,065 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) [2023-02-15 18:57:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:50,136 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-02-15 18:57:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 18:57:50,137 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 [2023-02-15 18:57:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:50,138 INFO L225 Difference]: With dead ends: 41 [2023-02-15 18:57:50,138 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 18:57:50,140 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 [2023-02-15 18:57:50,144 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:50,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 18:57:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 18:57:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-15 18:57:50,150 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) [2023-02-15 18:57:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-15 18:57:50,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2023-02-15 18:57:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:50,152 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-15 18:57:50,152 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) [2023-02-15 18:57:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-15 18:57:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 18:57:50,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:50,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:50,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:50,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:50,365 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-15 18:57:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397802934] [2023-02-15 18:57:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:50,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:50,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212325216] [2023-02-15 18:57:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:50,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:50,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:50,390 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) [2023-02-15 18:57:50,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 18:57:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:50,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 18:57:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:50,505 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:50,510 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:50,512 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:50,545 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:50,588 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2023-02-15 18:57:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:50,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:57:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:50,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:50,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397802934] [2023-02-15 18:57:50,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:50,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212325216] [2023-02-15 18:57:50,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212325216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:57:50,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:57:50,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-02-15 18:57:50,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872174766] [2023-02-15 18:57:50,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:57:50,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 18:57:50,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:50,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 18:57:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 18:57:50,822 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:51,182 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-15 18:57:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 18:57:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 18:57:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:51,184 INFO L225 Difference]: With dead ends: 54 [2023-02-15 18:57:51,184 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 18:57:51,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2023-02-15 18:57:51,185 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:51,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 66 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 18:57:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 18:57:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2023-02-15 18:57:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-15 18:57:51,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2023-02-15 18:57:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:51,198 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-15 18:57:51,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-15 18:57:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 18:57:51,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:51,199 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:51,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:51,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:51,405 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2023-02-15 18:57:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:51,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341267466] [2023-02-15 18:57:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:51,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:51,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71616491] [2023-02-15 18:57:51,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:51,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:51,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:51,429 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) [2023-02-15 18:57:51,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 18:57:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 18:57:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 18:57:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:51,530 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:51,541 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:51,545 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:51,549 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:51,554 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:51,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:51,616 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 18:57:51,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-02-15 18:57:51,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:51,671 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 18:57:51,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-02-15 18:57:51,842 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 18:57:51,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 34 [2023-02-15 18:57:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:51,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:57:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:52,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:52,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341267466] [2023-02-15 18:57:52,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:52,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71616491] [2023-02-15 18:57:52,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71616491] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:57:52,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:57:52,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-02-15 18:57:52,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018563176] [2023-02-15 18:57:52,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:57:52,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 18:57:52,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 18:57:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-02-15 18:57:52,312 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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) [2023-02-15 18:57:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:53,906 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-02-15 18:57:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 18:57:53,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 [2023-02-15 18:57:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:53,907 INFO L225 Difference]: With dead ends: 82 [2023-02-15 18:57:53,907 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 18:57:53,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 18:57:53,908 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:53,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 98 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 18:57:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 18:57:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-02-15 18:57:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-02-15 18:57:53,920 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 20 [2023-02-15 18:57:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:53,921 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-02-15 18:57:53,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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) [2023-02-15 18:57:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-02-15 18:57:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 18:57:53,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:53,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:53,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 18:57:54,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:54,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:54,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2023-02-15 18:57:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:54,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143163892] [2023-02-15 18:57:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:54,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:54,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:54,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594627875] [2023-02-15 18:57:54,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:57:54,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:54,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:54,166 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) [2023-02-15 18:57:54,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 18:57:54,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:57:54,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:57:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 18:57:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 18:57:54,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:57:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 18:57:54,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:54,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143163892] [2023-02-15 18:57:54,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:54,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594627875] [2023-02-15 18:57:54,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594627875] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:57:54,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:57:54,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-15 18:57:54,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397851974] [2023-02-15 18:57:54,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:57:54,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 18:57:54,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 18:57:54,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 18:57:54,323 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:54,447 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2023-02-15 18:57:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 18:57:54,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 18:57:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:54,448 INFO L225 Difference]: With dead ends: 103 [2023-02-15 18:57:54,448 INFO L226 Difference]: Without dead ends: 80 [2023-02-15 18:57:54,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-15 18:57:54,450 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:54,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 55 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:57:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-15 18:57:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2023-02-15 18:57:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2023-02-15 18:57:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-15 18:57:54,461 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2023-02-15 18:57:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:54,462 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-15 18:57:54,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-15 18:57:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 18:57:54,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:54,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:54,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:54,668 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,SelfDestructingSolverStorable7 [2023-02-15 18:57:54,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 3 times [2023-02-15 18:57:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549307357] [2023-02-15 18:57:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:54,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:54,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659626036] [2023-02-15 18:57:54,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:57:54,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:54,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:54,708 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) [2023-02-15 18:57:54,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 18:57:54,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 18:57:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:57:54,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 18:57:54,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:54,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:57:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:54,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549307357] [2023-02-15 18:57:54,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:54,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659626036] [2023-02-15 18:57:54,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659626036] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:57:54,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:57:54,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-15 18:57:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442609534] [2023-02-15 18:57:54,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:57:54,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 18:57:54,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 18:57:54,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:57:54,954 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:55,205 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2023-02-15 18:57:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 18:57:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-15 18:57:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:55,207 INFO L225 Difference]: With dead ends: 113 [2023-02-15 18:57:55,207 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 18:57:55,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-02-15 18:57:55,210 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 108 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:55,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 70 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:57:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 18:57:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2023-02-15 18:57:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-15 18:57:55,238 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 22 [2023-02-15 18:57:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:55,238 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-15 18:57:55,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-15 18:57:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 18:57:55,243 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:55,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:55,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:55,450 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 2 times [2023-02-15 18:57:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:55,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63656359] [2023-02-15 18:57:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:55,468 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:55,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530607504] [2023-02-15 18:57:55,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 18:57:55,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:55,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:55,470 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) [2023-02-15 18:57:55,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 18:57:55,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 18:57:55,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:57:55,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 18:57:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 18:57:55,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:57:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 18:57:55,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63656359] [2023-02-15 18:57:55,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:55,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530607504] [2023-02-15 18:57:55,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530607504] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:57:55,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:57:55,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-15 18:57:55,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703950916] [2023-02-15 18:57:55,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:57:55,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 18:57:55,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:55,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 18:57:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-15 18:57:55,643 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2023-02-15 18:57:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:55,893 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-15 18:57:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 18:57:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 18:57:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:55,894 INFO L225 Difference]: With dead ends: 83 [2023-02-15 18:57:55,894 INFO L226 Difference]: Without dead ends: 67 [2023-02-15 18:57:55,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-02-15 18:57:55,895 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 111 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:55,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 93 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 18:57:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-15 18:57:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2023-02-15 18:57:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-15 18:57:55,904 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2023-02-15 18:57:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:55,904 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-15 18:57:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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) [2023-02-15 18:57:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-15 18:57:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 18:57:55,905 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:55,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:55,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:56,111 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,SelfDestructingSolverStorable9 [2023-02-15 18:57:56,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2023-02-15 18:57:56,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618710054] [2023-02-15 18:57:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:56,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:56,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:56,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752079938] [2023-02-15 18:57:56,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:57:56,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:56,143 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) [2023-02-15 18:57:56,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 18:57:56,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:57:56,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:57:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 18:57:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:56,449 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:56,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:56,455 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:56,458 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:56,472 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:56,497 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:56,521 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:56,555 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 50 [2023-02-15 18:57:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:56,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 18:57:56,619 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 50 [2023-02-15 18:57:56,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:56,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:56,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 18:57:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:56,660 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:56,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:57:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 18:57:57,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:57:57,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618710054] [2023-02-15 18:57:57,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:57:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752079938] [2023-02-15 18:57:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752079938] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:57:57,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:57:57,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-02-15 18:57:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887763186] [2023-02-15 18:57:57,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:57:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 18:57:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:57:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 18:57:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=276, Unknown=3, NotChecked=0, Total=380 [2023-02-15 18:57:57,183 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:57:57,927 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-02-15 18:57:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 18:57:57,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 18:57:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:57:57,929 INFO L225 Difference]: With dead ends: 111 [2023-02-15 18:57:57,929 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 18:57:57,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=808, Unknown=3, NotChecked=0, Total=1122 [2023-02-15 18:57:57,931 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 136 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 18:57:57,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 154 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 18:57:57,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 18:57:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 49. [2023-02-15 18:57:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-02-15 18:57:57,944 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2023-02-15 18:57:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:57:57,945 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-02-15 18:57:57,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:57:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-02-15 18:57:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 18:57:57,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:57:57,946 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:57:57,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 18:57:58,152 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,SelfDestructingSolverStorable10 [2023-02-15 18:57:58,152 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:57:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:57:58,153 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2023-02-15 18:57:58,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:57:58,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121360779] [2023-02-15 18:57:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:57:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:57:58,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:57:58,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922719497] [2023-02-15 18:57:58,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 18:57:58,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:57:58,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:57:58,192 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) [2023-02-15 18:57:58,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 18:57:58,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 18:57:58,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:57:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 18:57:58,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:57:58,495 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-02-15 18:57:58,496 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:58,501 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:58,527 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-02-15 18:57:58,527 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 68 [2023-02-15 18:57:58,550 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:58,563 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 17 [2023-02-15 18:57:58,582 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:58,604 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:57:58,665 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:57:58,666 INFO L350 Elim1Store]: Elim1 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 132 treesize of output 124 [2023-02-15 18:57:58,685 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:57:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,689 INFO L350 Elim1Store]: Elim1 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 113 treesize of output 187 [2023-02-15 18:57:58,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-02-15 18:57:58,745 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 18:57:58,827 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:57:58,828 INFO L350 Elim1Store]: Elim1 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 79 treesize of output 71 [2023-02-15 18:57:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:58,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 119 [2023-02-15 18:57:58,848 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 18:57:59,021 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:57:59,022 INFO L350 Elim1Store]: Elim1 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 157 treesize of output 141 [2023-02-15 18:57:59,030 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:57:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,035 INFO L350 Elim1Store]: Elim1 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 123 treesize of output 197 [2023-02-15 18:57:59,045 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 18:57:59,253 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:57:59,254 INFO L350 Elim1Store]: Elim1 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 269 treesize of output 243 [2023-02-15 18:57:59,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:57:59,267 INFO L350 Elim1Store]: Elim1 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 163 treesize of output 235 [2023-02-15 18:57:59,804 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-15 18:57:59,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 42 [2023-02-15 18:57:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:57:59,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:58:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:58:06,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:58:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121360779] [2023-02-15 18:58:06,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:58:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922719497] [2023-02-15 18:58:06,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922719497] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:58:06,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:58:06,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2023-02-15 18:58:06,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154789144] [2023-02-15 18:58:06,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:58:06,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 18:58:06,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:58:06,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 18:58:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 18:58:06,573 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:58:29,167 WARN L233 SmtUtils]: Spent 21.50s on a formula simplification. DAG size of input: 221 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:58:43,201 WARN L233 SmtUtils]: Spent 9.90s on a formula simplification. DAG size of input: 196 DAG size of output: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 18:59:01,030 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse71 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse38 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4294967295) 4294967296)) (.cse70 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse72 (mod .cse70 4294967296)) (.cse53 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse10 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse12 (* .cse38 8)) (.cse68 (* .cse71 8))) (let ((.cse55 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse68)) (.cse37 (select .cse10 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse12))) (.cse67 (select .cse53 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse12))) (.cse27 (<= .cse72 2147483647)) (.cse69 (* .cse72 8)) (.cse31 (<= .cse71 2147483647))) (let ((.cse30 (not .cse31)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse68 (- 34359738368))) (.cse40 (< .cse70 c_~N~0)) (.cse13 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse69 (- 34359738368))) (.cse14 (not .cse27)) (.cse5 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8)) (.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse21 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse69)) (.cse39 (< 3 c_~N~0)) (.cse0 (not (< 2 c_~N~0))) (.cse1 (< (+ |c_ULTIMATE.start_main_~i~0#1| 2) c_~N~0)) (.cse54 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse69)) (.cse41 (store .cse53 .cse55 (+ .cse37 .cse67))) (.cse28 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse68)) (.cse42 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16)) (.cse66 (<= (mod c_~N~0 4294967296) 536870911))) (and (or .cse0 .cse1 (let ((.cse2 (<= .cse38 2147483647))) (and (or .cse2 (and (forall ((v_ArrVal_429 Int)) (= (let ((.cse9 (store (store .cse10 .cse11 (+ (select .cse10 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse12 (- 34359738368))) 6)) .cse13 v_ArrVal_429))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse9))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse6 (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (select .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ (select (select (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse4 .cse5 (+ .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse6 .cse7))))) 19)) .cse14)) (or (not .cse2) (let ((.cse29 (+ .cse37 6))) (and (or (let ((.cse20 (store .cse10 .cse28 .cse29))) (and (or (forall ((v_ArrVal_429 Int)) (= (let ((.cse19 (store .cse20 .cse21 v_ArrVal_429))) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse19))) (let ((.cse17 (select .cse16 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse15 (select .cse19 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (select .cse17 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse15 (select (select (store .cse16 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse17 .cse5 (+ .cse15 .cse18))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse18))))) 19)) .cse14) (or (forall ((v_ArrVal_429 Int)) (= (let ((.cse26 (store .cse20 .cse13 v_ArrVal_429))) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse26))) (let ((.cse25 (select .cse24 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse22 (select .cse25 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse23 (select .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse22 .cse23 (select (select (store .cse24 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse25 .cse5 (+ .cse22 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8)))))) 19)) .cse27))) .cse30) (or .cse31 (forall ((v_ArrVal_429 Int)) (= (let ((.cse36 (store (store .cse10 .cse11 .cse29) .cse13 v_ArrVal_429))) (let ((.cse34 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse36))) (let ((.cse35 (select .cse34 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse32 (select .cse35 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse33 (select .cse36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse32 .cse33 (select (select (store .cse34 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse35 .cse5 (+ .cse32 .cse33))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8)))))) 19)))))))) .cse39) (or .cse40 .cse0 (= (select .cse41 .cse42) 19)) (or (and (or .cse30 (forall ((v_ArrVal_429 Int)) (= (let ((.cse47 (store .cse10 .cse28 v_ArrVal_429))) (let ((.cse45 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse47))) (let ((.cse46 (select .cse45 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse43 (select .cse46 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse44 (select .cse47 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse43 .cse44 (select (select (store .cse45 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse46 .cse5 (+ .cse43 .cse44))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8)))))) 19))) (or .cse31 (forall ((v_ArrVal_429 Int)) (= (let ((.cse52 (store .cse10 .cse11 v_ArrVal_429))) (let ((.cse49 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse52))) (let ((.cse50 (select .cse49 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse48 (select .cse50 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse51 (select .cse52 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse48 (select (select (store .cse49 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse50 .cse5 (+ .cse48 .cse51))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse51))))) 19)))) .cse40 .cse0 .cse39) (or .cse40 .cse0 (= (select .cse53 .cse42) 19)) (or .cse0 .cse1 (= (select (store .cse53 .cse54 (+ (select .cse10 .cse28) (select .cse53 .cse55))) .cse42) 19)) (or .cse0 .cse1 (and (or (forall ((v_ArrVal_429 Int)) (= (let ((.cse60 (store .cse10 .cse13 v_ArrVal_429))) (let ((.cse56 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse60))) (let ((.cse57 (select .cse56 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse58 (select .cse60 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse59 (select .cse57 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ (select (select (store .cse56 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse57 .cse5 (+ .cse58 .cse59))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse58 .cse59))))) 19)) .cse27) (or .cse14 (forall ((v_ArrVal_429 Int)) (= (let ((.cse65 (store .cse10 .cse21 v_ArrVal_429))) (let ((.cse61 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse65))) (let ((.cse62 (select .cse61 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse63 (select .cse62 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse64 (select .cse65 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse61 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse62 .cse5 (+ .cse63 .cse64))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8) .cse63 .cse64))))) 19)))) .cse39) .cse66 (or .cse0 .cse1 (= (select (store .cse41 .cse54 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse41) |c_ULTIMATE.start_main_~a~0#1.base|) .cse28) .cse37 .cse67)) .cse42) 19)) (or (and (not .cse66) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 0)) (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse66))))))) is different from true [2023-02-15 18:59:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 18:59:02,273 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2023-02-15 18:59:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-15 18:59:02,273 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 18:59:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 18:59:02,274 INFO L225 Difference]: With dead ends: 81 [2023-02-15 18:59:02,274 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 18:59:02,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=987, Invalid=3438, Unknown=1, NotChecked=130, Total=4556 [2023-02-15 18:59:02,276 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 143 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-15 18:59:02,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 140 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 333 Invalid, 0 Unknown, 1 Unchecked, 4.0s Time] [2023-02-15 18:59:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 18:59:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2023-02-15 18:59:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:59:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-02-15 18:59:02,288 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2023-02-15 18:59:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 18:59:02,289 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-02-15 18:59:02,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 18:59:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-02-15 18:59:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 18:59:02,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 18:59:02,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 18:59:02,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 18:59:02,496 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,SelfDestructingSolverStorable11 [2023-02-15 18:59:02,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 18:59:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 18:59:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 4 times [2023-02-15 18:59:02,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 18:59:02,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555463888] [2023-02-15 18:59:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 18:59:02,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 18:59:02,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 18:59:02,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145302769] [2023-02-15 18:59:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 18:59:02,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 18:59:02,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 18:59:02,542 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) [2023-02-15 18:59:02,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 18:59:02,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 18:59:02,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 18:59:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 18:59:02,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 18:59:02,853 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:59:02,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:02,859 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:59:02,862 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:59:02,865 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:59:02,870 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 18:59:02,907 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:59:02,907 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 60 [2023-02-15 18:59:02,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:02,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-15 18:59:02,922 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-15 18:59:02,993 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:59:02,994 INFO L350 Elim1Store]: Elim1 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 117 treesize of output 109 [2023-02-15 18:59:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,008 INFO L350 Elim1Store]: Elim1 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 98 treesize of output 182 [2023-02-15 18:59:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,126 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-15 18:59:03,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 53 [2023-02-15 18:59:03,246 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:59:03,246 INFO L350 Elim1Store]: Elim1 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 159 treesize of output 143 [2023-02-15 18:59:03,252 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:59:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,257 INFO L350 Elim1Store]: Elim1 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 123 treesize of output 197 [2023-02-15 18:59:03,420 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-15 18:59:03,421 INFO L350 Elim1Store]: Elim1 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 167 treesize of output 147 [2023-02-15 18:59:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:59:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 213 [2023-02-15 18:59:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 136 [2023-02-15 18:59:03,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:59:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 18:59:03,635 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 18:59:03,639 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-02-15 18:59:03,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 77 [2023-02-15 18:59:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:59:03,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 18:59:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 18:59:20,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 18:59:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555463888] [2023-02-15 18:59:20,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 18:59:20,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145302769] [2023-02-15 18:59:20,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145302769] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 18:59:20,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 18:59:20,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2023-02-15 18:59:20,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569436533] [2023-02-15 18:59:20,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 18:59:20,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 18:59:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 18:59:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 18:59:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-02-15 18:59:20,985 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 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) [2023-02-15 18:59:34,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-15 19:00:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:00:00,506 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2023-02-15 19:00:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 19:00:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 19:00:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:00:00,507 INFO L225 Difference]: With dead ends: 150 [2023-02-15 19:00:00,507 INFO L226 Difference]: Without dead ends: 148 [2023-02-15 19:00:00,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=677, Invalid=2862, Unknown=1, NotChecked=0, Total=3540 [2023-02-15 19:00:00,509 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 358 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:00:00,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 218 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2023-02-15 19:00:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-15 19:00:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 78. [2023-02-15 19:00:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:00:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2023-02-15 19:00:00,532 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 28 [2023-02-15 19:00:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:00:00,533 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2023-02-15 19:00:00,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 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) [2023-02-15 19:00:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2023-02-15 19:00:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 19:00:00,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:00:00,534 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:00:00,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 19:00:00,736 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,SelfDestructingSolverStorable12 [2023-02-15 19:00:00,737 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:00:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:00:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 5 times [2023-02-15 19:00:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:00:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307900668] [2023-02-15 19:00:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:00:00,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:00:00,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 19:00:00,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676826195] [2023-02-15 19:00:00,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 19:00:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:00:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:00:00,753 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) [2023-02-15 19:00:00,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process