/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:13:08,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:13:08,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:13:08,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:13:08,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:13:08,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:13:08,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:13:08,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:13:08,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:13:08,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:13:08,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:13:08,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:13:08,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:13:08,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:13:08,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:13:08,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:13:08,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:13:08,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:13:08,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:13:08,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:13:08,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:13:08,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:13:08,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:13:08,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:13:08,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 18:13:08,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 18:13:08,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 18:13:08,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 18:13:08,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 18:13:08,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 18:13:08,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:13:08,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:13:08,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:13:08,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:13:08,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:13:08,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:13:08,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:13:08,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:13:08,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:13:08,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:13:08,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:13:08,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:13:08,687 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:13:08,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:13:08,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:13:08,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:13:08,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:13:08,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:13:08,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:13:08,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:13:08,689 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:13:08,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:13:08,690 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:13:08,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:13:08,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:13:08,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:13:08,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:13:08,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:13:08,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:13:08,691 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:13:08,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:13:08,691 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:13:08,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:13:08,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:13:08,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:13:08,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:13:08,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:13:08,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:13:08,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:13:08,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:13:08,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:13:08,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:13:08,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:13:08,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:13:08,693 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:13:08,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:13:08,693 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:13:08,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:13:08,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:13:08,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:13:08,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:13:08,947 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:13:08,947 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:13:08,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-04-01 18:13:10,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:13:10,303 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:13:10,304 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2023-04-01 18:13:10,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58f8bfb98/bd32fe7dc5dc412aab4cb64fbe069409/FLAG36e6ea3fe [2023-04-01 18:13:10,320 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58f8bfb98/bd32fe7dc5dc412aab4cb64fbe069409 [2023-04-01 18:13:10,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:13:10,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:13:10,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:13:10,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:13:10,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:13:10,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ae2bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10, skipping insertion in model container [2023-04-01 18:13:10,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:13:10,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:13:10,461 WARN L247 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-examples/standard_allDiff2_ground.i[817,830] [2023-04-01 18:13:10,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:13:10,486 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:13:10,498 WARN L247 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-examples/standard_allDiff2_ground.i[817,830] [2023-04-01 18:13:10,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:13:10,517 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:13:10,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10 WrapperNode [2023-04-01 18:13:10,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:13:10,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:13:10,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:13:10,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:13:10,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:13:10,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:13:10,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:13:10,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:13:10,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (1/1) ... [2023-04-01 18:13:10,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:13:10,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:10,581 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) [2023-04-01 18:13:10,587 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 [2023-04-01 18:13:10,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:13:10,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:13:10,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:13:10,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:13:10,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:13:10,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:13:10,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:13:10,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:13:10,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:13:10,616 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:13:10,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:13:10,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:13:10,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:13:10,683 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:13:10,685 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:13:10,815 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:13:10,820 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:13:10,820 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 18:13:10,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:13:10 BoogieIcfgContainer [2023-04-01 18:13:10,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:13:10,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:13:10,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:13:10,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:13:10,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:13:10" (1/3) ... [2023-04-01 18:13:10,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5cd8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:13:10, skipping insertion in model container [2023-04-01 18:13:10,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:10" (2/3) ... [2023-04-01 18:13:10,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5cd8bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:13:10, skipping insertion in model container [2023-04-01 18:13:10,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:13:10" (3/3) ... [2023-04-01 18:13:10,829 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2023-04-01 18:13:10,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:13:10,845 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:13:10,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:13:10,893 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;@3c798df6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:13:10,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:13:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:13:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:13:10,903 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:10,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:10,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:10,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash 981523330, now seen corresponding path program 1 times [2023-04-01 18:13:10,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524128394] [2023-04-01 18:13:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:11,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:13:11,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:11,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524128394] [2023-04-01 18:13:11,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524128394] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:11,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:11,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:13:11,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265250025] [2023-04-01 18:13:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:13:11,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:11,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:13:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:13:11,254 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:11,355 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2023-04-01 18:13:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:13:11,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:13:11,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:11,364 INFO L225 Difference]: With dead ends: 56 [2023-04-01 18:13:11,364 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 18:13:11,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:13:11,370 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:11,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 18:13:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 18:13:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-04-01 18:13:11,401 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2023-04-01 18:13:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:11,402 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-04-01 18:13:11,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-04-01 18:13:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:13:11,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:11,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:11,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:13:11,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:11,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:11,404 INFO L85 PathProgramCache]: Analyzing trace with hash 730672319, now seen corresponding path program 1 times [2023-04-01 18:13:11,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:11,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640686623] [2023-04-01 18:13:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:11,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:11,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:13:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:11,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640686623] [2023-04-01 18:13:11,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640686623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:11,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:11,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:13:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622519083] [2023-04-01 18:13:11,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:11,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:13:11,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:13:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:13:11,514 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:11,597 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-04-01 18:13:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:13:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:13:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:11,598 INFO L225 Difference]: With dead ends: 48 [2023-04-01 18:13:11,598 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 18:13:11,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:13:11,600 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:11,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 12 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 18:13:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-01 18:13:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-04-01 18:13:11,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2023-04-01 18:13:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:11,623 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-04-01 18:13:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-04-01 18:13:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 18:13:11,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:11,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:13:11,625 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:11,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash -157742879, now seen corresponding path program 1 times [2023-04-01 18:13:11,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:11,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848628601] [2023-04-01 18:13:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:11,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:13:11,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848628601] [2023-04-01 18:13:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848628601] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342134518] [2023-04-01 18:13:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:11,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:11,787 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) [2023-04-01 18:13:11,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:13:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:11,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:13:11,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:11,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:13:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342134518] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:11,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:13:11,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-04-01 18:13:11,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286120042] [2023-04-01 18:13:11,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:11,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:13:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:13:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:13:11,898 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:11,930 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-04-01 18:13:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:13:11,930 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 18:13:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:11,931 INFO L225 Difference]: With dead ends: 47 [2023-04-01 18:13:11,931 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 18:13:11,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:13:11,933 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:11,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:13:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 18:13:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-04-01 18:13:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-04-01 18:13:11,939 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2023-04-01 18:13:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:11,939 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-04-01 18:13:11,939 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-04-01 18:13:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:13:11,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:11,940 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] [2023-04-01 18:13:11,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:12,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:12,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:12,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash -606723, now seen corresponding path program 1 times [2023-04-01 18:13:12,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:12,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081824947] [2023-04-01 18:13:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:12,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:12,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081824947] [2023-04-01 18:13:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081824947] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248756582] [2023-04-01 18:13:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:12,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:12,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:12,243 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) [2023-04-01 18:13:12,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:13:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:12,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:13:12,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:12,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:12,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248756582] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:12,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:12,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:13:12,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422376690] [2023-04-01 18:13:12,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:12,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:13:12,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:13:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:13:12,399 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:12,582 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2023-04-01 18:13:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:13:12,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 18:13:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:12,586 INFO L225 Difference]: With dead ends: 79 [2023-04-01 18:13:12,586 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 18:13:12,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:13:12,589 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:12,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 17 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 18:13:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2023-04-01 18:13:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-04-01 18:13:12,617 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2023-04-01 18:13:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:12,617 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-04-01 18:13:12,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-04-01 18:13:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 18:13:12,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:12,621 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:12,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:12,827 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 [2023-04-01 18:13:12,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:12,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 424831703, now seen corresponding path program 2 times [2023-04-01 18:13:12,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:12,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622601041] [2023-04-01 18:13:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:12,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:13:12,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:12,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622601041] [2023-04-01 18:13:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622601041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:12,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:12,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:13:12,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117627126] [2023-04-01 18:13:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:12,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:13:12,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:12,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:13:12,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:13:12,971 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:13,054 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-04-01 18:13:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:13:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 18:13:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:13,055 INFO L225 Difference]: With dead ends: 60 [2023-04-01 18:13:13,056 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 18:13:13,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:13:13,058 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:13,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 18:13:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-04-01 18:13:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-04-01 18:13:13,069 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 27 [2023-04-01 18:13:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:13,070 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-04-01 18:13:13,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-04-01 18:13:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 18:13:13,071 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:13,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:13,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 18:13:13,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:13,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1006955424, now seen corresponding path program 1 times [2023-04-01 18:13:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:13,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548852488] [2023-04-01 18:13:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:13,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:13:13,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:13,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548852488] [2023-04-01 18:13:13,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548852488] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:13,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888282361] [2023-04-01 18:13:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:13,249 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) [2023-04-01 18:13:13,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:13:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:13,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:13:13,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:13:13,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:13:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888282361] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:13,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:13,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-04-01 18:13:13,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312488587] [2023-04-01 18:13:13,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 18:13:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 18:13:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2023-04-01 18:13:13,491 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:13,885 INFO L93 Difference]: Finished difference Result 109 states and 148 transitions. [2023-04-01 18:13:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 18:13:13,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-01 18:13:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:13,889 INFO L225 Difference]: With dead ends: 109 [2023-04-01 18:13:13,889 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 18:13:13,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2023-04-01 18:13:13,891 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 271 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:13,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 27 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:13:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 18:13:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-01 18:13:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2023-04-01 18:13:13,916 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 30 [2023-04-01 18:13:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:13,917 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2023-04-01 18:13:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2023-04-01 18:13:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 18:13:13,922 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:13,922 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:13,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:14,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:14,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:14,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2054705388, now seen corresponding path program 2 times [2023-04-01 18:13:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:14,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353027830] [2023-04-01 18:13:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:14,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-04-01 18:13:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:14,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353027830] [2023-04-01 18:13:14,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353027830] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:14,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648656256] [2023-04-01 18:13:14,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:13:14,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:14,446 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) [2023-04-01 18:13:14,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:13:14,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:13:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:14,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:13:14,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-04-01 18:13:14,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-04-01 18:13:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648656256] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:14,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:14,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:13:14,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632014920] [2023-04-01 18:13:14,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:14,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:13:14,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:13:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:13:14,855 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:15,664 INFO L93 Difference]: Finished difference Result 317 states and 430 transitions. [2023-04-01 18:13:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:13:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-01 18:13:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:15,666 INFO L225 Difference]: With dead ends: 317 [2023-04-01 18:13:15,667 INFO L226 Difference]: Without dead ends: 256 [2023-04-01 18:13:15,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:13:15,669 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 848 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:15,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 22 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:13:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-04-01 18:13:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 112. [2023-04-01 18:13:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 106 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2023-04-01 18:13:15,696 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 66 [2023-04-01 18:13:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:15,697 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2023-04-01 18:13:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2023-04-01 18:13:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 18:13:15,701 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:15,701 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:15,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:15,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:15,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:15,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash -707613820, now seen corresponding path program 3 times [2023-04-01 18:13:15,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:15,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752846908] [2023-04-01 18:13:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:15,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:16,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-04-01 18:13:16,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:16,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752846908] [2023-04-01 18:13:16,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752846908] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:16,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877704902] [2023-04-01 18:13:16,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:13:16,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:16,549 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) [2023-04-01 18:13:16,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:13:16,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:13:16,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:16,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 18:13:16,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 584 trivial. 0 not checked. [2023-04-01 18:13:16,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:13:16,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877704902] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:16,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:13:16,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [26] total 30 [2023-04-01 18:13:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115129758] [2023-04-01 18:13:16,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:13:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:13:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2023-04-01 18:13:16,762 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:16,859 INFO L93 Difference]: Finished difference Result 205 states and 267 transitions. [2023-04-01 18:13:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 18:13:16,859 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2023-04-01 18:13:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:16,861 INFO L225 Difference]: With dead ends: 205 [2023-04-01 18:13:16,861 INFO L226 Difference]: Without dead ends: 192 [2023-04-01 18:13:16,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2023-04-01 18:13:16,863 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:16,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:13:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-04-01 18:13:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 113. [2023-04-01 18:13:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 107 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2023-04-01 18:13:16,884 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 90 [2023-04-01 18:13:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:16,885 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2023-04-01 18:13:16,886 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2023-04-01 18:13:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 18:13:16,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:16,887 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:16,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:17,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:17,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:17,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1290489811, now seen corresponding path program 4 times [2023-04-01 18:13:17,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:17,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089537910] [2023-04-01 18:13:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:17,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-04-01 18:13:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:17,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089537910] [2023-04-01 18:13:17,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089537910] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:17,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142844851] [2023-04-01 18:13:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:13:17,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:17,732 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) [2023-04-01 18:13:17,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:13:17,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:13:17,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:17,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:13:17,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-04-01 18:13:17,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-04-01 18:13:18,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142844851] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:18,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:18,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-01 18:13:18,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69073757] [2023-04-01 18:13:18,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:18,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:13:18,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:18,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:13:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:13:18,681 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:21,061 INFO L93 Difference]: Finished difference Result 765 states and 1048 transitions. [2023-04-01 18:13:21,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:13:21,062 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2023-04-01 18:13:21,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:21,066 INFO L225 Difference]: With dead ends: 765 [2023-04-01 18:13:21,066 INFO L226 Difference]: Without dead ends: 703 [2023-04-01 18:13:21,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 18:13:21,070 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2316 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2317 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:21,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2317 Valid, 47 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 18:13:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2023-04-01 18:13:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 161. [2023-04-01 18:13:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 155 states have (on average 1.1483870967741936) internal successors, (178), 155 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2023-04-01 18:13:21,096 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 93 [2023-04-01 18:13:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:21,096 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2023-04-01 18:13:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2023-04-01 18:13:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-04-01 18:13:21,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:21,098 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:21,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:21,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:21,304 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:21,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:21,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1957944157, now seen corresponding path program 5 times [2023-04-01 18:13:21,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:21,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114438152] [2023-04-01 18:13:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:21,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:23,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-04-01 18:13:23,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114438152] [2023-04-01 18:13:23,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114438152] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:23,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616931042] [2023-04-01 18:13:23,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:13:23,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:23,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:23,065 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) [2023-04-01 18:13:23,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:13:36,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-04-01 18:13:36,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:36,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:13:36,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 120 proven. 15 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2023-04-01 18:13:36,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 127 proven. 8 refuted. 0 times theorem prover too weak. 2119 trivial. 0 not checked. [2023-04-01 18:13:37,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616931042] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:37,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:37,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 13, 13] total 72 [2023-04-01 18:13:37,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942058417] [2023-04-01 18:13:37,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:37,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-04-01 18:13:37,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:37,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-04-01 18:13:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=3731, Unknown=0, NotChecked=0, Total=5112 [2023-04-01 18:13:37,341 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 72 states, 72 states have (on average 2.3333333333333335) internal successors, (168), 71 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:44,758 INFO L93 Difference]: Finished difference Result 580 states and 862 transitions. [2023-04-01 18:13:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2023-04-01 18:13:44,759 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.3333333333333335) internal successors, (168), 71 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2023-04-01 18:13:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:44,765 INFO L225 Difference]: With dead ends: 580 [2023-04-01 18:13:44,765 INFO L226 Difference]: Without dead ends: 518 [2023-04-01 18:13:44,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19124 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17674, Invalid=46588, Unknown=0, NotChecked=0, Total=64262 [2023-04-01 18:13:44,783 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4080 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4080 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:44,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4080 Valid, 52 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [993 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 18:13:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-04-01 18:13:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 509. [2023-04-01 18:13:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 503 states have (on average 1.268389662027833) internal successors, (638), 503 states have internal predecessors, (638), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:13:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 643 transitions. [2023-04-01 18:13:44,930 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 643 transitions. Word has length 141 [2023-04-01 18:13:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:44,931 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 643 transitions. [2023-04-01 18:13:44,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.3333333333333335) internal successors, (168), 71 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 643 transitions. [2023-04-01 18:13:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2023-04-01 18:13:44,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:44,941 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:44,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:45,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:45,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:45,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash 334529330, now seen corresponding path program 6 times [2023-04-01 18:13:45,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:45,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566638896] [2023-04-01 18:13:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:48,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 17771 trivial. 0 not checked. [2023-04-01 18:13:48,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566638896] [2023-04-01 18:13:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566638896] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977175578] [2023-04-01 18:13:48,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:13:48,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:48,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:48,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:13:48,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:13:48,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-04-01 18:13:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:48,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 18:13:48,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7686 proven. 26 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2023-04-01 18:13:48,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 19980 backedges. 7690 proven. 22 refuted. 0 times theorem prover too weak. 12268 trivial. 0 not checked. [2023-04-01 18:13:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977175578] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:48,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:48,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 10, 10] total 63 [2023-04-01 18:13:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642313218] [2023-04-01 18:13:48,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:48,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-04-01 18:13:48,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-04-01 18:13:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1269, Invalid=2637, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 18:13:48,847 INFO L87 Difference]: Start difference. First operand 509 states and 643 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 62 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:14:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:14:07,096 INFO L93 Difference]: Finished difference Result 1497 states and 2044 transitions. [2023-04-01 18:14:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2023-04-01 18:14:07,097 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 62 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 503 [2023-04-01 18:14:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:14:07,101 INFO L225 Difference]: With dead ends: 1497 [2023-04-01 18:14:07,101 INFO L226 Difference]: Without dead ends: 1089 [2023-04-01 18:14:07,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1728 GetRequests, 1239 SyntacticMatches, 4 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95892 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=46669, Invalid=190013, Unknown=0, NotChecked=0, Total=236682 [2023-04-01 18:14:07,121 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7478 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7478 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:14:07,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7478 Valid, 62 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 18:14:07,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2023-04-01 18:14:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 693. [2023-04-01 18:14:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 687 states have (on average 1.2838427947598254) internal successors, (882), 687 states have internal predecessors, (882), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:14:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 887 transitions. [2023-04-01 18:14:07,327 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 887 transitions. Word has length 503 [2023-04-01 18:14:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:14:07,328 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 887 transitions. [2023-04-01 18:14:07,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 62 states have internal predecessors, (149), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:14:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 887 transitions. [2023-04-01 18:14:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-04-01 18:14:07,339 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:14:07,340 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 48, 48, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:14:07,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:14:07,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 18:14:07,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:14:07,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:14:07,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1021812486, now seen corresponding path program 7 times [2023-04-01 18:14:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:14:07,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940956770] [2023-04-01 18:14:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:14:07,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:14:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:14:10,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:14:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:14:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-04-01 18:14:10,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:14:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940956770] [2023-04-01 18:14:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940956770] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:14:10,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858660524] [2023-04-01 18:14:10,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:14:10,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:14:10,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:14:10,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:14:10,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:14:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:14:11,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:14:11,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:14:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-04-01 18:14:11,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:14:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33622 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-04-01 18:14:13,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858660524] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:14:13,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:14:13,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-04-01 18:14:13,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579305811] [2023-04-01 18:14:13,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:14:13,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 18:14:13,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:14:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 18:14:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 18:14:13,624 INFO L87 Difference]: Start difference. First operand 693 states and 887 transitions. Second operand has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:14:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:14:21,318 INFO L93 Difference]: Finished difference Result 2352 states and 3146 transitions. [2023-04-01 18:14:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 18:14:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 619 [2023-04-01 18:14:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:14:21,325 INFO L225 Difference]: With dead ends: 2352 [2023-04-01 18:14:21,325 INFO L226 Difference]: Without dead ends: 1762 [2023-04-01 18:14:21,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1190 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-04-01 18:14:21,328 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4996 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4997 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:14:21,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4997 Valid, 42 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 18:14:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2023-04-01 18:14:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 793. [2023-04-01 18:14:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 787 states have (on average 1.2477763659466328) internal successors, (982), 787 states have internal predecessors, (982), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:14:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 987 transitions. [2023-04-01 18:14:21,504 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 987 transitions. Word has length 619 [2023-04-01 18:14:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:14:21,506 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 987 transitions. [2023-04-01 18:14:21,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 101 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:14:21,506 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 987 transitions. [2023-04-01 18:14:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 720 [2023-04-01 18:14:21,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:14:21,513 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 98, 98, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:14:21,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:14:21,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:14:21,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:14:21,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:14:21,723 INFO L85 PathProgramCache]: Analyzing trace with hash 882273890, now seen corresponding path program 8 times [2023-04-01 18:14:21,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:14:21,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939676626] [2023-04-01 18:14:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:14:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:14:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:14:28,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:14:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:14:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-04-01 18:14:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:14:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939676626] [2023-04-01 18:14:28,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939676626] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:14:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518030176] [2023-04-01 18:14:28,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:14:28,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:14:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:14:28,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:14:28,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:14:29,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:14:29,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:14:29,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 100 conjunts are in the unsatisfiable core [2023-04-01 18:14:29,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:14:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-04-01 18:14:29,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:14:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40922 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-04-01 18:14:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518030176] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:14:39,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:14:39,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2023-04-01 18:14:39,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695954468] [2023-04-01 18:14:39,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:14:39,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2023-04-01 18:14:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:14:39,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2023-04-01 18:14:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2023-04-01 18:14:39,047 INFO L87 Difference]: Start difference. First operand 793 states and 987 transitions. Second operand has 202 states, 202 states have (on average 2.0594059405940595) internal successors, (416), 201 states have internal predecessors, (416), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:15:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:15:34,637 INFO L93 Difference]: Finished difference Result 4452 states and 5996 transitions. [2023-04-01 18:15:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2023-04-01 18:15:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 2.0594059405940595) internal successors, (416), 201 states have internal predecessors, (416), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 719 [2023-04-01 18:15:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:15:34,652 INFO L225 Difference]: With dead ends: 4452 [2023-04-01 18:15:34,653 INFO L226 Difference]: Without dead ends: 3862 [2023-04-01 18:15:34,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1738 GetRequests, 1340 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24942 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=59901, Invalid=99699, Unknown=0, NotChecked=0, Total=159600 [2023-04-01 18:15:34,663 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11754 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11755 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 4737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:15:34,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11755 Valid, 52 Invalid, 4737 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1220 Valid, 3517 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 18:15:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2023-04-01 18:15:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 993. [2023-04-01 18:15:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 987 states have (on average 1.1975683890577509) internal successors, (1182), 987 states have internal predecessors, (1182), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:15:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1187 transitions. [2023-04-01 18:15:34,911 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1187 transitions. Word has length 719 [2023-04-01 18:15:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:15:34,912 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1187 transitions. [2023-04-01 18:15:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 2.0594059405940595) internal successors, (416), 201 states have internal predecessors, (416), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:15:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1187 transitions. [2023-04-01 18:15:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2023-04-01 18:15:34,920 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:15:34,921 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 123, 123, 123, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:15:34,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:15:35,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 18:15:35,127 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:15:35,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:15:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1718750438, now seen corresponding path program 9 times [2023-04-01 18:15:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:15:35,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349742226] [2023-04-01 18:15:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:15:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:15:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:16:00,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:16:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:16:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 0 proven. 39204 refuted. 0 times theorem prover too weak. 31318 trivial. 0 not checked. [2023-04-01 18:16:00,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:16:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349742226] [2023-04-01 18:16:00,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349742226] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:16:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073656341] [2023-04-01 18:16:00,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:16:00,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:16:00,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:16:00,613 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:16:00,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:16:00,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 18:16:00,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:16:00,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 18:16:00,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:16:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 1471 proven. 12 refuted. 0 times theorem prover too weak. 69039 trivial. 0 not checked. [2023-04-01 18:16:01,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:16:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 70522 backedges. 1471 proven. 12 refuted. 0 times theorem prover too weak. 69039 trivial. 0 not checked. [2023-04-01 18:16:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073656341] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:16:02,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:16:02,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 9, 9] total 215 [2023-04-01 18:16:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256269467] [2023-04-01 18:16:02,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:16:02,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2023-04-01 18:16:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:16:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2023-04-01 18:16:02,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21369, Invalid=24641, Unknown=0, NotChecked=0, Total=46010 [2023-04-01 18:16:02,380 INFO L87 Difference]: Start difference. First operand 993 states and 1187 transitions. Second operand has 215 states, 215 states have (on average 2.1069767441860465) internal successors, (453), 214 states have internal predecessors, (453), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)