./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --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/list-ext3-properties/sll_nondet_insert-2.i -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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 00:54:05,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 00:54:05,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 00:54:05,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 00:54:05,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 00:54:05,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 00:54:05,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 00:54:05,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 00:54:05,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 00:54:05,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 00:54:05,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 00:54:05,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 00:54:05,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 00:54:05,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 00:54:05,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 00:54:05,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 00:54:05,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 00:54:05,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 00:54:05,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 00:54:05,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 00:54:05,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 00:54:05,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 00:54:05,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 00:54:05,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 00:54:05,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 00:54:05,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 00:54:05,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 00:54:05,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 00:54:05,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 00:54:05,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 00:54:05,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 00:54:05,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 00:54:05,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 00:54:05,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 00:54:05,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 00:54:05,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 00:54:05,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 00:54:05,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 00:54:05,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 00:54:05,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 00:54:05,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 00:54:05,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 00:54:05,410 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 00:54:05,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 00:54:05,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 00:54:05,411 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 00:54:05,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 00:54:05,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 00:54:05,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 00:54:05,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 00:54:05,413 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 00:54:05,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 00:54:05,414 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 00:54:05,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 00:54:05,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 00:54:05,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 00:54:05,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 00:54:05,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 00:54:05,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 00:54:05,415 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 00:54:05,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 00:54:05,415 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 00:54:05,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 00:54:05,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 00:54:05,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 00:54:05,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 00:54:05,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:54:05,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 00:54:05,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 00:54:05,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 00:54:05,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 00:54:05,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 00:54:05,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 00:54:05,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 00:54:05,417 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 00:54:05,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 00:54:05,418 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 00:54:05,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2023-02-17 00:54:05,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 00:54:05,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 00:54:05,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 00:54:05,592 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 00:54:05,592 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 00:54:05,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-02-17 00:54:06,611 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 00:54:06,782 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 00:54:06,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-02-17 00:54:06,790 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344f1075c/b5fbd9a2851c4ca79d8bd6bca4d95e3a/FLAG19ea2cd8f [2023-02-17 00:54:06,800 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/344f1075c/b5fbd9a2851c4ca79d8bd6bca4d95e3a [2023-02-17 00:54:06,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 00:54:06,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 00:54:06,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 00:54:06,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 00:54:06,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 00:54:06,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:54:06" (1/1) ... [2023-02-17 00:54:06,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568c8f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:06, skipping insertion in model container [2023-02-17 00:54:06,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 12:54:06" (1/1) ... [2023-02-17 00:54:06,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 00:54:06,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 00:54:07,049 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/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-02-17 00:54:07,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:54:07,059 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 00:54:07,100 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/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-02-17 00:54:07,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 00:54:07,118 INFO L208 MainTranslator]: Completed translation [2023-02-17 00:54:07,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07 WrapperNode [2023-02-17 00:54:07,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 00:54:07,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 00:54:07,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 00:54:07,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 00:54:07,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,155 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2023-02-17 00:54:07,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 00:54:07,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 00:54:07,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 00:54:07,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 00:54:07,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 00:54:07,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 00:54:07,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 00:54:07,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 00:54:07,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (1/1) ... [2023-02-17 00:54:07,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 00:54:07,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:54:07,232 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 00:54:07,244 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 00:54:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-02-17 00:54:07,270 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-02-17 00:54:07,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 00:54:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-02-17 00:54:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-02-17 00:54:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 00:54:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 00:54:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 00:54:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 00:54:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 00:54:07,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 00:54:07,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 00:54:07,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 00:54:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 00:54:07,369 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 00:54:07,371 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 00:54:07,406 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-02-17 00:54:07,637 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 00:54:07,641 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 00:54:07,646 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 00:54:07,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:54:07 BoogieIcfgContainer [2023-02-17 00:54:07,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 00:54:07,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 00:54:07,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 00:54:07,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 00:54:07,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 12:54:06" (1/3) ... [2023-02-17 00:54:07,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d025725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:54:07, skipping insertion in model container [2023-02-17 00:54:07,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 12:54:07" (2/3) ... [2023-02-17 00:54:07,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d025725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 12:54:07, skipping insertion in model container [2023-02-17 00:54:07,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 12:54:07" (3/3) ... [2023-02-17 00:54:07,655 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2023-02-17 00:54:07,666 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 00:54:07,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 00:54:07,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 00:54:07,715 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;@21979d3d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 00:54:07,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 00:54:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 39 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 00:54:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 00:54:07,724 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:54:07,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 00:54:07,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:54:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:54:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1347884454, now seen corresponding path program 1 times [2023-02-17 00:54:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:54:07,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034946267] [2023-02-17 00:54:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:54:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:07,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:54:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:07,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 00:54:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 00:54:07,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:54:07,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034946267] [2023-02-17 00:54:07,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034946267] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:54:07,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:54:07,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 00:54:07,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250443542] [2023-02-17 00:54:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:54:07,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 00:54:07,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:54:07,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 00:54:07,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 00:54:07,944 INFO L87 Difference]: Start difference. First operand has 45 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 39 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:54:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:54:07,965 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2023-02-17 00:54:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 00:54:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-17 00:54:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:54:07,970 INFO L225 Difference]: With dead ends: 87 [2023-02-17 00:54:07,970 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 00:54:07,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 00:54:07,975 INFO L413 NwaCegarLoop]: 56 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, 56 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 00:54:07,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:54:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 00:54:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-17 00:54:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 00:54:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-02-17 00:54:08,002 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 26 [2023-02-17 00:54:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:54:08,003 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-02-17 00:54:08,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:54:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-02-17 00:54:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 00:54:08,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:54:08,005 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] [2023-02-17 00:54:08,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 00:54:08,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:54:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:54:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1629031390, now seen corresponding path program 1 times [2023-02-17 00:54:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:54:08,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868241716] [2023-02-17 00:54:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:54:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:08,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:54:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:08,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-17 00:54:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 00:54:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:54:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868241716] [2023-02-17 00:54:08,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868241716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:54:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367386598] [2023-02-17 00:54:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:08,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:08,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:54:08,306 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 00:54:08,308 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 00:54:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 00:54:08,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:54:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:54:08,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 00:54:08,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367386598] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:54:08,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 00:54:08,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-02-17 00:54:08,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366316503] [2023-02-17 00:54:08,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:54:08,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:54:08,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:54:08,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:54:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-17 00:54:08,429 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:54:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:54:08,472 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2023-02-17 00:54:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:54:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-02-17 00:54:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:54:08,473 INFO L225 Difference]: With dead ends: 66 [2023-02-17 00:54:08,474 INFO L226 Difference]: Without dead ends: 38 [2023-02-17 00:54:08,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-17 00:54:08,475 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 00:54:08,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 195 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 00:54:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-17 00:54:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-17 00:54:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 00:54:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-02-17 00:54:08,479 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 31 [2023-02-17 00:54:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:54:08,480 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-02-17 00:54:08,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:54:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-02-17 00:54:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 00:54:08,481 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:54:08,481 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] [2023-02-17 00:54:08,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 00:54:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:08,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:54:08,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:54:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash -719160247, now seen corresponding path program 1 times [2023-02-17 00:54:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:54:08,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311651581] [2023-02-17 00:54:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:54:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:08,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:54:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:08,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-17 00:54:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:54:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:54:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311651581] [2023-02-17 00:54:08,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311651581] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 00:54:08,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 00:54:08,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 00:54:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121748263] [2023-02-17 00:54:08,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 00:54:08,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 00:54:08,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:54:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 00:54:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 00:54:08,810 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:54:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:54:08,905 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-02-17 00:54:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 00:54:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-02-17 00:54:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:54:08,907 INFO L225 Difference]: With dead ends: 61 [2023-02-17 00:54:08,907 INFO L226 Difference]: Without dead ends: 56 [2023-02-17 00:54:08,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-17 00:54:08,908 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 136 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:54:08,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 151 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:54:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-17 00:54:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2023-02-17 00:54:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 00:54:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-02-17 00:54:08,918 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 35 [2023-02-17 00:54:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:54:08,919 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-02-17 00:54:08,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 00:54:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-02-17 00:54:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 00:54:08,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:54:08,920 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 00:54:08,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 00:54:08,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:54:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:54:08,922 INFO L85 PathProgramCache]: Analyzing trace with hash -767476857, now seen corresponding path program 1 times [2023-02-17 00:54:08,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:54:08,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235801750] [2023-02-17 00:54:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:54:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:09,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:54:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-17 00:54:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:54:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:54:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235801750] [2023-02-17 00:54:09,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235801750] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:54:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262214491] [2023-02-17 00:54:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:09,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:54:09,116 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 00:54:09,144 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 00:54:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:09,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 00:54:09,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:54:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 00:54:09,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:54:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 00:54:09,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262214491] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:54:09,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:54:09,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-17 00:54:09,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619067081] [2023-02-17 00:54:09,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:54:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 00:54:09,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:54:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 00:54:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-17 00:54:09,382 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:54:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:54:09,525 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2023-02-17 00:54:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 00:54:09,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-02-17 00:54:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:54:09,528 INFO L225 Difference]: With dead ends: 94 [2023-02-17 00:54:09,528 INFO L226 Difference]: Without dead ends: 63 [2023-02-17 00:54:09,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-02-17 00:54:09,529 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:54:09,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 408 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:54:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-17 00:54:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2023-02-17 00:54:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 00:54:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-02-17 00:54:09,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 36 [2023-02-17 00:54:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:54:09,534 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-02-17 00:54:09,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:54:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-02-17 00:54:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 00:54:09,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:54:09,536 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2023-02-17 00:54:09,555 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 00:54:09,758 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,SelfDestructingSolverStorable3 [2023-02-17 00:54:09,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:54:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:54:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1635273792, now seen corresponding path program 2 times [2023-02-17 00:54:09,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:54:09,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148877074] [2023-02-17 00:54:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:54:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:54:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:09,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:54:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:54:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:54:09,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148877074] [2023-02-17 00:54:09,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148877074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:54:09,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088474566] [2023-02-17 00:54:09,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 00:54:09,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:54:09,925 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 00:54:09,945 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 00:54:10,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 00:54:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:54:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-17 00:54:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:54:10,052 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 00:54:10,127 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 15 treesize of output 7 [2023-02-17 00:54:10,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:54:10,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-17 00:54:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:54:10,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:54:10,152 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 25 treesize of output 17 [2023-02-17 00:54:10,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:54:10,191 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 143 [2023-02-17 00:54:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:54:10,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088474566] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:54:10,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:54:10,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2023-02-17 00:54:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133612645] [2023-02-17 00:54:10,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:54:10,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 00:54:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:54:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 00:54:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-02-17 00:54:10,238 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 00:54:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:54:10,417 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-02-17 00:54:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 00:54:10,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2023-02-17 00:54:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:54:10,418 INFO L225 Difference]: With dead ends: 79 [2023-02-17 00:54:10,419 INFO L226 Difference]: Without dead ends: 74 [2023-02-17 00:54:10,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2023-02-17 00:54:10,420 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 224 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 00:54:10,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 498 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 00:54:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-17 00:54:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2023-02-17 00:54:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 00:54:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-02-17 00:54:10,427 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 40 [2023-02-17 00:54:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:54:10,427 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-02-17 00:54:10,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 00:54:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-02-17 00:54:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 00:54:10,428 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:54:10,428 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2023-02-17 00:54:10,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 00:54:10,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:10,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:54:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:54:10,634 INFO L85 PathProgramCache]: Analyzing trace with hash 897774320, now seen corresponding path program 3 times [2023-02-17 00:54:10,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:54:10,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279286769] [2023-02-17 00:54:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:10,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:54:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:10,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:54:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:10,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:54:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:54:10,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:54:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279286769] [2023-02-17 00:54:10,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279286769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:54:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547910184] [2023-02-17 00:54:10,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 00:54:10,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:54:10,861 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 00:54:10,864 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 00:54:10,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 00:54:10,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:54:10,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 00:54:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:54:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 00:54:10,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:54:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 00:54:11,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547910184] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 00:54:11,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 00:54:11,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15] total 26 [2023-02-17 00:54:11,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191336748] [2023-02-17 00:54:11,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 00:54:11,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-17 00:54:11,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 00:54:11,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-17 00:54:11,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-02-17 00:54:11,089 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:54:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 00:54:11,341 INFO L93 Difference]: Finished difference Result 153 states and 193 transitions. [2023-02-17 00:54:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 00:54:11,343 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-02-17 00:54:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 00:54:11,346 INFO L225 Difference]: With dead ends: 153 [2023-02-17 00:54:11,346 INFO L226 Difference]: Without dead ends: 148 [2023-02-17 00:54:11,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 00:54:11,348 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 99 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 00:54:11,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 752 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 00:54:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-17 00:54:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2023-02-17 00:54:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 86 states have (on average 1.244186046511628) internal successors, (107), 89 states have internal predecessors, (107), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-17 00:54:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2023-02-17 00:54:11,388 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 41 [2023-02-17 00:54:11,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 00:54:11,389 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2023-02-17 00:54:11,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 00:54:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2023-02-17 00:54:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 00:54:11,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 00:54:11,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2023-02-17 00:54:11,399 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 00:54:11,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:11,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 00:54:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 00:54:11,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2112854464, now seen corresponding path program 4 times [2023-02-17 00:54:11,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 00:54:11,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278441082] [2023-02-17 00:54:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 00:54:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 00:54:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:11,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 00:54:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 00:54:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 00:54:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 00:54:11,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 00:54:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278441082] [2023-02-17 00:54:11,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278441082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 00:54:11,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134804088] [2023-02-17 00:54:11,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 00:54:11,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 00:54:11,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 00:54:11,993 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 00:54:12,059 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 00:54:12,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 00:54:12,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 00:54:12,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-17 00:54:12,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 00:54:12,142 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 6 treesize of output 5 [2023-02-17 00:54:12,155 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 00:54:12,157 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 00:54:12,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:54:12,170 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 00:54:12,187 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 00:54:12,190 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 23 treesize of output 22 [2023-02-17 00:54:12,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:54:12,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 120 treesize of output 171 [2023-02-17 00:54:12,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:54:12,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 139 [2023-02-17 00:54:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 00:54:12,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 00:54:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 00:54:12,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:54:12,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 4140 treesize of output 3933 [2023-02-17 00:54:13,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 00:54:13,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 0 disjoint index pairs (out of 780 index pairs), introduced 49 new quantified variables, introduced 780 case distinctions, treesize of input 249348 treesize of output 212512