./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifcomp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/ifcomp.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 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 20:59:39,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 20:59:39,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 20:59:39,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 20:59:39,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 20:59:39,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 20:59:39,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 20:59:39,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 20:59:39,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 20:59:39,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 20:59:39,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 20:59:39,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 20:59:39,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 20:59:39,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 20:59:39,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 20:59:39,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 20:59:39,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 20:59:39,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 20:59:39,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 20:59:39,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 20:59:39,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 20:59:39,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 20:59:39,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 20:59:39,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 20:59:39,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 20:59:39,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 20:59:39,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 20:59:39,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 20:59:39,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 20:59:39,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 20:59:39,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 20:59:39,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 20:59:39,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 20:59:39,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 20:59:39,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 20:59:39,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 20:59:39,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 20:59:39,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 20:59:39,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 20:59:39,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 20:59:39,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 20:59:39,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 20:59:39,507 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 20:59:39,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 20:59:39,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 20:59:39,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 20:59:39,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 20:59:39,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 20:59:39,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 20:59:39,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 20:59:39,512 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 20:59:39,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 20:59:39,513 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 20:59:39,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 20:59:39,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 20:59:39,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 20:59:39,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 20:59:39,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 20:59:39,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 20:59:39,514 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 20:59:39,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 20:59:39,514 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 20:59:39,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 20:59:39,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 20:59:39,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 20:59:39,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 20:59:39,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 20:59:39,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 20:59:39,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 20:59:39,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 20:59:39,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 20:59:39,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 20:59:39,517 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 20:59:39,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 20:59:39,517 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 20:59:39,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 20:59:39,517 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 20:59:39,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d2a65255d8b2e6b68882339bb2639d8ae744f5b340e0d3d33c067476b0c9dc7 [2023-02-17 20:59:39,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 20:59:39,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 20:59:39,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 20:59:39,734 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 20:59:39,734 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 20:59:39,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcomp.c [2023-02-17 20:59:40,725 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 20:59:40,871 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 20:59:40,872 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcomp.c [2023-02-17 20:59:40,876 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506455ab9/678b46f324184f99b9ab3c0ca03a5cd7/FLAG70fb0e205 [2023-02-17 20:59:40,892 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506455ab9/678b46f324184f99b9ab3c0ca03a5cd7 [2023-02-17 20:59:40,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 20:59:40,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 20:59:40,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 20:59:40,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 20:59:40,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 20:59:40,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:59:40" (1/1) ... [2023-02-17 20:59:40,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b197c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:40, skipping insertion in model container [2023-02-17 20:59:40,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:59:40" (1/1) ... [2023-02-17 20:59:40,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 20:59:40,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 20:59:41,031 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/ifcomp.c[589,602] [2023-02-17 20:59:41,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 20:59:41,059 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 20:59:41,068 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/ifcomp.c[589,602] [2023-02-17 20:59:41,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 20:59:41,086 INFO L208 MainTranslator]: Completed translation [2023-02-17 20:59:41,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41 WrapperNode [2023-02-17 20:59:41,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 20:59:41,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 20:59:41,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 20:59:41,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 20:59:41,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,116 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-02-17 20:59:41,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 20:59:41,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 20:59:41,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 20:59:41,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 20:59:41,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 20:59:41,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 20:59:41,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 20:59:41,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 20:59:41,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (1/1) ... [2023-02-17 20:59:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 20:59:41,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:41,165 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) [2023-02-17 20:59:41,166 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 [2023-02-17 20:59:41,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 20:59:41,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 20:59:41,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 20:59:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 20:59:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 20:59:41,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 20:59:41,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 20:59:41,303 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 20:59:41,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 20:59:41,473 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 20:59:41,492 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 20:59:41,492 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 20:59:41,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:59:41 BoogieIcfgContainer [2023-02-17 20:59:41,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 20:59:41,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 20:59:41,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 20:59:41,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 20:59:41,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:59:40" (1/3) ... [2023-02-17 20:59:41,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e1bfbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:59:41, skipping insertion in model container [2023-02-17 20:59:41,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:59:41" (2/3) ... [2023-02-17 20:59:41,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e1bfbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:59:41, skipping insertion in model container [2023-02-17 20:59:41,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:59:41" (3/3) ... [2023-02-17 20:59:41,499 INFO L112 eAbstractionObserver]: Analyzing ICFG ifcomp.c [2023-02-17 20:59:41,509 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 20:59:41,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 20:59:41,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 20:59:41,541 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;@260cf017, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 20:59:41,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 20:59:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:59:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 20:59:41,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:59:41,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:59:41,548 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:59:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:59:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2023-02-17 20:59:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:59:41,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104065204] [2023-02-17 20:59:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:59:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:41,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:59:41,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104065204] [2023-02-17 20:59:41,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 20:59:41,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526150292] [2023-02-17 20:59:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:41,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:59:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:41,664 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) [2023-02-17 20:59:41,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 20:59:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:41,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 20:59:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:59:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:59:41,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 20:59:41,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526150292] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 20:59:41,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 20:59:41,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 20:59:41,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967731210] [2023-02-17 20:59:41,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 20:59:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 20:59:41,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:59:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 20:59:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 20:59:41,755 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2023-02-17 20:59:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:59:41,765 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2023-02-17 20:59:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 20:59:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 [2023-02-17 20:59:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:59:41,771 INFO L225 Difference]: With dead ends: 50 [2023-02-17 20:59:41,771 INFO L226 Difference]: Without dead ends: 23 [2023-02-17 20:59:41,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 20:59:41,774 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2023-02-17 20:59:41,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:59:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-17 20:59:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-17 20:59:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2023-02-17 20:59:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-02-17 20:59:41,793 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2023-02-17 20:59:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:59:41,794 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-02-17 20:59:41,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2023-02-17 20:59:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-02-17 20:59:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 20:59:41,794 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:59:41,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:59:41,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 20:59:42,001 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 [2023-02-17 20:59:42,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:59:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:59:42,002 INFO L85 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2023-02-17 20:59:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:59:42,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66827010] [2023-02-17 20:59:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:42,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:59:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:59:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66827010] [2023-02-17 20:59:42,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 20:59:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506160748] [2023-02-17 20:59:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:42,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:59:42,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:42,051 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) [2023-02-17 20:59:42,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 20:59:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 20:59:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:59:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 20:59:42,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 20:59:42,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506160748] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 20:59:42,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 20:59:42,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 20:59:42,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861260429] [2023-02-17 20:59:42,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 20:59:42,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 20:59:42,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:59:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 20:59:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 20:59:42,143 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-02-17 20:59:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:59:42,207 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-02-17 20:59:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 20:59:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 [2023-02-17 20:59:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:59:42,208 INFO L225 Difference]: With dead ends: 53 [2023-02-17 20:59:42,208 INFO L226 Difference]: Without dead ends: 38 [2023-02-17 20:59:42,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 20:59:42,209 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 20:59:42,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 20:59:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-17 20:59:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2023-02-17 20:59:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:59:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-17 20:59:42,225 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2023-02-17 20:59:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:59:42,226 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-17 20:59:42,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-02-17 20:59:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-17 20:59:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 20:59:42,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:59:42,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:59:42,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 20:59:42,431 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 [2023-02-17 20:59:42,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:59:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:59:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -203130337, now seen corresponding path program 1 times [2023-02-17 20:59:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:59:42,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229344670] [2023-02-17 20:59:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:59:42,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 20:59:42,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763689542] [2023-02-17 20:59:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:42,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:59:42,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:42,480 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) [2023-02-17 20:59:42,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 20:59:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 20:59:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:59:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 20:59:42,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 20:59:42,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:59:42,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229344670] [2023-02-17 20:59:42,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 20:59:42,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763689542] [2023-02-17 20:59:42,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763689542] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 20:59:42,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 20:59:42,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 20:59:42,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523966264] [2023-02-17 20:59:42,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 20:59:42,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 20:59:42,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:59:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 20:59:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 20:59:42,550 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2023-02-17 20:59:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:59:42,594 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-02-17 20:59:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 20:59:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2023-02-17 20:59:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:59:42,595 INFO L225 Difference]: With dead ends: 58 [2023-02-17 20:59:42,595 INFO L226 Difference]: Without dead ends: 38 [2023-02-17 20:59:42,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 20:59:42,598 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 20:59:42,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:59:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-17 20:59:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2023-02-17 20:59:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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) [2023-02-17 20:59:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-17 20:59:42,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 23 [2023-02-17 20:59:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:59:42,617 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-17 20:59:42,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2023-02-17 20:59:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-17 20:59:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 20:59:42,620 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:59:42,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:59:42,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 20:59:42,824 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 [2023-02-17 20:59:42,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:59:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:59:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2023-02-17 20:59:42,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:59:42,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299649648] [2023-02-17 20:59:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:42,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:59:42,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 20:59:42,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155271708] [2023-02-17 20:59:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:42,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:59:42,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:42,842 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) [2023-02-17 20:59:42,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 20:59:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 20:59:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:59:42,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 20:59:42,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:59:42,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 20:59:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 20:59:42,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 20:59:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:59:42,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299649648] [2023-02-17 20:59:42,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 20:59:42,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155271708] [2023-02-17 20:59:42,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155271708] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 20:59:42,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 20:59:42,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 20:59:42,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44021475] [2023-02-17 20:59:42,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 20:59:42,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 20:59:42,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:59:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 20:59:42,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 20:59:42,963 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2023-02-17 20:59:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:59:43,019 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-02-17 20:59:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 20:59:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 23 [2023-02-17 20:59:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:59:43,023 INFO L225 Difference]: With dead ends: 46 [2023-02-17 20:59:43,024 INFO L226 Difference]: Without dead ends: 44 [2023-02-17 20:59:43,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-17 20:59:43,027 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 20:59:43,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 77 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 20:59:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-17 20:59:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2023-02-17 20:59:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2023-02-17 20:59:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-02-17 20:59:43,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2023-02-17 20:59:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:59:43,039 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-02-17 20:59:43,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2023-02-17 20:59:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-02-17 20:59:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 20:59:43,040 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:59:43,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:59:43,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 20:59:43,247 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 [2023-02-17 20:59:43,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:59:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:59:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1659346963, now seen corresponding path program 1 times [2023-02-17 20:59:43,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:59:43,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147257714] [2023-02-17 20:59:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:43,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:59:43,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 20:59:43,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403833730] [2023-02-17 20:59:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:59:43,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:43,276 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) [2023-02-17 20:59:43,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 20:59:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:43,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 20:59:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:59:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 20:59:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:59:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 20:59:43,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:59:43,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147257714] [2023-02-17 20:59:43,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 20:59:43,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403833730] [2023-02-17 20:59:43,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403833730] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:59:43,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 20:59:43,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-17 20:59:43,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418485353] [2023-02-17 20:59:43,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 20:59:43,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 20:59:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:59:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 20:59:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 20:59:43,361 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:59:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:59:43,457 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2023-02-17 20:59:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 20:59:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-17 20:59:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:59:43,458 INFO L225 Difference]: With dead ends: 92 [2023-02-17 20:59:43,458 INFO L226 Difference]: Without dead ends: 53 [2023-02-17 20:59:43,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-17 20:59:43,459 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 20:59:43,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 41 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 20:59:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-17 20:59:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2023-02-17 20:59:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 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) [2023-02-17 20:59:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-17 20:59:43,462 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2023-02-17 20:59:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:59:43,462 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-17 20:59:43,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 20:59:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-17 20:59:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 20:59:43,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:59:43,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:59:43,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 20:59:43,668 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 [2023-02-17 20:59:43,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:59:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:59:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash -643446870, now seen corresponding path program 1 times [2023-02-17 20:59:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:59:43,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448562175] [2023-02-17 20:59:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:43,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:59:43,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 20:59:43,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125932926] [2023-02-17 20:59:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:43,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:59:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:43,689 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) [2023-02-17 20:59:43,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 20:59:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:43,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 20:59:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:59:43,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 20:59:43,815 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 50 treesize of output 43 [2023-02-17 20:59:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:59:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:59:43,822 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 42 treesize of output 87 [2023-02-17 20:59:43,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:59:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 20:59:43,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 22 [2023-02-17 20:59:43,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:59:43,878 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 42 treesize of output 23 [2023-02-17 20:59:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 20:59:43,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 20:59:44,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-02-17 20:59:44,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-02-17 20:59:44,012 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 20:59:44,014 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 20:59:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 20:59:44,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 20:59:44,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448562175] [2023-02-17 20:59:44,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 20:59:44,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125932926] [2023-02-17 20:59:44,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125932926] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 20:59:44,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 20:59:44,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-02-17 20:59:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227684395] [2023-02-17 20:59:44,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 20:59:44,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 20:59:44,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 20:59:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 20:59:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-17 20:59:44,029 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 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) [2023-02-17 20:59:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 20:59:44,348 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2023-02-17 20:59:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 20:59:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-17 20:59:44,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 20:59:44,349 INFO L225 Difference]: With dead ends: 134 [2023-02-17 20:59:44,349 INFO L226 Difference]: Without dead ends: 106 [2023-02-17 20:59:44,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-02-17 20:59:44,350 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 235 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 20:59:44,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 86 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 20:59:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-17 20:59:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 49. [2023-02-17 20:59:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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) [2023-02-17 20:59:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-02-17 20:59:44,358 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 32 [2023-02-17 20:59:44,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 20:59:44,358 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-02-17 20:59:44,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 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) [2023-02-17 20:59:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-02-17 20:59:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 20:59:44,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 20:59:44,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 20:59:44,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 20:59:44,559 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 [2023-02-17 20:59:44,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 20:59:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 20:59:44,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2023-02-17 20:59:44,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 20:59:44,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963853620] [2023-02-17 20:59:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:44,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 20:59:44,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 20:59:44,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650842827] [2023-02-17 20:59:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 20:59:44,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 20:59:44,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 20:59:44,610 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) [2023-02-17 20:59:44,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 20:59:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 20:59:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-17 20:59:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 20:59:44,710 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 44 treesize of output 42 [2023-02-17 20:59:44,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 20:59:44,732 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 50 treesize of output 43 [2023-02-17 20:59:44,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 42 treesize of output 87 [2023-02-17 20:59:44,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 22 [2023-02-17 20:59:44,754 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 19 treesize of output 18 [2023-02-17 20:59:44,770 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 113 treesize of output 101 [2023-02-17 20:59:44,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:59:44,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 168 [2023-02-17 20:59:44,782 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 20:59:44,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 20:59:44,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 155 treesize of output 498