/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:03:26,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:03:26,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:03:26,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:03:26,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:03:26,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:03:26,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:03:26,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:03:26,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:03:26,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:03:26,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:03:26,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:03:26,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:03:26,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:03:26,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:03:26,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:03:26,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:03:26,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:03:26,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:03:26,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:03:26,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:03:26,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:03:26,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:03:26,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:03:26,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:03:26,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:03:26,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:03:26,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:03:26,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:03:26,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:03:26,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:03:26,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:03:26,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:03:26,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:03:26,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:03:26,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:03:26,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:03:26,804 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:03:26,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:03:26,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:03:26,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:03:26,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:03:26,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:03:26,806 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:03:26,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:03:26,807 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:03:26,807 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:03:26,807 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:03:26,808 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:03:26,808 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:03:26,808 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:03:26,808 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:03:26,808 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:03:26,808 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:03:26,809 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:03:26,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:03:26,809 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:03:26,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:03:26,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:03:26,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:03:26,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:03:26,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:03:26,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:03:26,811 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:03:26,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:03:26,811 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:03:26,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:03:26,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:03:26,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:03:26,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:03:26,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:03:26,812 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:03:26,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:03:26,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:03:26,813 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:03:26,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:03:26,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:03:26,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:03:26,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:03:27,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:03:27,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:03:27,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:03:27,070 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:03:27,071 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:03:27,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_k.i [2023-04-01 05:03:28,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:03:28,448 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:03:28,449 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i [2023-04-01 05:03:28,454 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/240239781/c2ba3bb1525d4a9d85a87c58497cac23/FLAG9e5e7d8cb [2023-04-01 05:03:28,467 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/240239781/c2ba3bb1525d4a9d85a87c58497cac23 [2023-04-01 05:03:28,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:03:28,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:03:28,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:03:28,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:03:28,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:03:28,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598dc010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28, skipping insertion in model container [2023-04-01 05:03:28,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:03:28,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:03:28,609 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/loop-new/count_by_k.i[891,904] [2023-04-01 05:03:28,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:03:28,624 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:03:28,634 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/loop-new/count_by_k.i[891,904] [2023-04-01 05:03:28,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:03:28,646 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:03:28,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28 WrapperNode [2023-04-01 05:03:28,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:03:28,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:03:28,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:03:28,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:03:28,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,668 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:03:28,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:03:28,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:03:28,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:03:28,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (1/1) ... [2023-04-01 05:03:28,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:03:28,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:28,700 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 05:03:28,706 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 05:03:28,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:03:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:03:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:03:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:03:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:03:28,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:03:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:03:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:03:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:03:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:03:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:03:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:03:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:03:28,794 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:03:28,796 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:03:28,892 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:03:28,912 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:03:28,912 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:03:28,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:03:28 BoogieIcfgContainer [2023-04-01 05:03:28,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:03:28,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:03:28,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:03:28,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:03:28,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:03:28" (1/3) ... [2023-04-01 05:03:28,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be5f143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:03:28, skipping insertion in model container [2023-04-01 05:03:28,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:03:28" (2/3) ... [2023-04-01 05:03:28,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be5f143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:03:28, skipping insertion in model container [2023-04-01 05:03:28,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:03:28" (3/3) ... [2023-04-01 05:03:28,928 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2023-04-01 05:03:28,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:03:28,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:03:28,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:03:29,000 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=FINITE_AUTOMATA, 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;@4c4ad0a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:03:29,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:03:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 05:03:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:03:29,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:29,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:29,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:29,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1907642805, now seen corresponding path program 1 times [2023-04-01 05:03:29,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:29,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826568639] [2023-04-01 05:03:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:29,478 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 05:03:29,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:29,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826568639] [2023-04-01 05:03:29,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826568639] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:03:29,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:03:29,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:03:29,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947749935] [2023-04-01 05:03:29,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:03:29,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:03:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:29,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:03:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:03:29,513 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 05:03:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:29,594 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-04-01 05:03:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:03:29,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 11 [2023-04-01 05:03:29,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:29,605 INFO L225 Difference]: With dead ends: 37 [2023-04-01 05:03:29,605 INFO L226 Difference]: Without dead ends: 13 [2023-04-01 05:03:29,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:03:29,613 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:29,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:03:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-01 05:03:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-01 05:03:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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 05:03:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-04-01 05:03:29,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2023-04-01 05:03:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:29,649 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-04-01 05:03:29,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 05:03:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-04-01 05:03:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 05:03:29,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:29,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:29,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:03:29,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:29,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:29,652 INFO L85 PathProgramCache]: Analyzing trace with hash 859952967, now seen corresponding path program 1 times [2023-04-01 05:03:29,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:29,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198474366] [2023-04-01 05:03:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:29,851 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 05:03:29,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:29,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198474366] [2023-04-01 05:03:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198474366] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:29,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695427227] [2023-04-01 05:03:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:29,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:29,857 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 05:03:29,858 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 05:03:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:29,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 05:03:29,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:29,983 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 05:03:29,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:30,055 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 05:03:30,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695427227] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:30,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143548260] [2023-04-01 05:03:30,077 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:03:30,077 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:30,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:30,085 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:30,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:30,167 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:03:30,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 05:03:30,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:03:30,325 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:30,702 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '178#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:30,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:30,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:30,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 11 [2023-04-01 05:03:30,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147210470] [2023-04-01 05:03:30,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:30,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 05:03:30,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 05:03:30,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:03:30,708 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 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 05:03:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:30,785 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2023-04-01 05:03:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:03:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 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 12 [2023-04-01 05:03:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:30,786 INFO L225 Difference]: With dead ends: 20 [2023-04-01 05:03:30,786 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 05:03:30,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 05:03:30,789 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:30,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:03:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 05:03:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 05:03:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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 05:03:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 05:03:30,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2023-04-01 05:03:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:30,798 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 05:03:30,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 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 05:03:30,798 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 05:03:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 05:03:30,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:30,799 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:30,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 05:03:31,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:31,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:31,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1830856647, now seen corresponding path program 2 times [2023-04-01 05:03:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561344585] [2023-04-01 05:03:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:31,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:31,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561344585] [2023-04-01 05:03:31,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561344585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:31,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813178379] [2023-04-01 05:03:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:03:31,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:31,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:31,076 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 05:03:31,079 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 05:03:31,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 05:03:31,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:03:31,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 05:03:31,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:31,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:31,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813178379] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1258830102] [2023-04-01 05:03:31,238 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:03:31,238 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:31,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:31,238 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:31,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:31,261 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:03:31,310 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 05:03:31,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:03:31,337 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:31,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '337#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:31,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:31,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:31,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-04-01 05:03:31,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378741321] [2023-04-01 05:03:31,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:31,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:03:31,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:03:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-04-01 05:03:31,598 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 05:03:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:31,710 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-04-01 05:03:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:03:31,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 14 [2023-04-01 05:03:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:31,712 INFO L225 Difference]: With dead ends: 24 [2023-04-01 05:03:31,712 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 05:03:31,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:03:31,713 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:31,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:03:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 05:03:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 05:03:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 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 05:03:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-04-01 05:03:31,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2023-04-01 05:03:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:31,718 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-04-01 05:03:31,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 05:03:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-04-01 05:03:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 05:03:31,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:31,719 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:31,733 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 05:03:31,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 05:03:31,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:31,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1066395847, now seen corresponding path program 3 times [2023-04-01 05:03:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:31,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341769303] [2023-04-01 05:03:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:31,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:32,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:32,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341769303] [2023-04-01 05:03:32,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341769303] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:32,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101802707] [2023-04-01 05:03:32,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:03:32,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:32,060 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 05:03:32,063 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 05:03:32,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:03:32,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:03:32,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 05:03:32,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:32,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:32,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101802707] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:32,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636300283] [2023-04-01 05:03:32,329 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:03:32,329 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:32,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:32,330 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:32,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:32,354 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:03:32,405 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 05:03:32,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:03:32,449 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:32,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '554#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:32,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:32,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-04-01 05:03:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219936591] [2023-04-01 05:03:32,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:32,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 05:03:32,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 05:03:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:03:32,737 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 05:03:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:33,043 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-04-01 05:03:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 05:03:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 05:03:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:33,045 INFO L225 Difference]: With dead ends: 32 [2023-04-01 05:03:33,045 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 05:03:33,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 05:03:33,046 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:33,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:03:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 05:03:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 05:03:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 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 05:03:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2023-04-01 05:03:33,052 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2023-04-01 05:03:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:33,055 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2023-04-01 05:03:33,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 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 05:03:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2023-04-01 05:03:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 05:03:33,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:33,056 INFO L195 NwaCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:33,064 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 05:03:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:33,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:33,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash 706013895, now seen corresponding path program 4 times [2023-04-01 05:03:33,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:33,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107711635] [2023-04-01 05:03:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:33,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:33,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:33,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107711635] [2023-04-01 05:03:33,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107711635] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:33,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501753680] [2023-04-01 05:03:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:03:33,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:33,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:33,580 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 05:03:33,583 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 05:03:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:33,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 05:03:33,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:33,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:34,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501753680] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:34,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739301033] [2023-04-01 05:03:34,192 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:03:34,193 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:34,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:34,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:34,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:34,211 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:03:34,263 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 05:03:34,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:03:34,285 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:34,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '883#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:34,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:34,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:34,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2023-04-01 05:03:34,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738963228] [2023-04-01 05:03:34,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 05:03:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 05:03:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 05:03:34,671 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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 05:03:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:35,538 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-04-01 05:03:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 05:03:35,538 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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 26 [2023-04-01 05:03:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:35,539 INFO L225 Difference]: With dead ends: 48 [2023-04-01 05:03:35,539 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 05:03:35,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1407, Invalid=3995, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 05:03:35,542 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:35,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:03:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 05:03:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-01 05:03:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 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 05:03:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2023-04-01 05:03:35,551 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 26 [2023-04-01 05:03:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:35,551 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2023-04-01 05:03:35,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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 05:03:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2023-04-01 05:03:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 05:03:35,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:35,552 INFO L195 NwaCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:35,561 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 05:03:35,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:35,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:35,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash -591860025, now seen corresponding path program 5 times [2023-04-01 05:03:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:35,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722600248] [2023-04-01 05:03:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:36,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:36,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722600248] [2023-04-01 05:03:36,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722600248] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:36,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149332824] [2023-04-01 05:03:36,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:03:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:36,546 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 05:03:36,547 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 05:03:36,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-04-01 05:03:36,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:03:36,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 05:03:36,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:36,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:38,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149332824] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:38,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682984005] [2023-04-01 05:03:38,246 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:03:38,247 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:38,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:38,247 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:38,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:38,268 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:03:38,299 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 05:03:38,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:03:38,319 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:38,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1436#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:38,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:38,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:38,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2023-04-01 05:03:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145761531] [2023-04-01 05:03:38,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:38,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-04-01 05:03:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-04-01 05:03:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=4226, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 05:03:38,786 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 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 05:03:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:03:41,561 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-04-01 05:03:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-04-01 05:03:41,561 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 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 42 [2023-04-01 05:03:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:03:41,563 INFO L225 Difference]: With dead ends: 80 [2023-04-01 05:03:41,563 INFO L226 Difference]: Without dead ends: 75 [2023-04-01 05:03:41,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5591, Invalid=13315, Unknown=0, NotChecked=0, Total=18906 [2023-04-01 05:03:41,568 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:03:41,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:03:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-01 05:03:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-04-01 05:03:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 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 05:03:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2023-04-01 05:03:41,582 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 42 [2023-04-01 05:03:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:03:41,583 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2023-04-01 05:03:41,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 68 states have internal predecessors, (75), 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 05:03:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2023-04-01 05:03:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 05:03:41,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:03:41,585 INFO L195 NwaCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:03:41,590 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 05:03:41,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:41,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:03:41,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:03:41,787 INFO L85 PathProgramCache]: Analyzing trace with hash -261556537, now seen corresponding path program 6 times [2023-04-01 05:03:41,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:03:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753225906] [2023-04-01 05:03:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:03:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:03:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:03:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:44,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:03:44,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753225906] [2023-04-01 05:03:44,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753225906] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:03:44,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640645479] [2023-04-01 05:03:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:03:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:03:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:03:44,338 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 05:03:44,340 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 05:03:44,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:03:44,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:03:44,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 66 conjunts are in the unsatisfiable core [2023-04-01 05:03:44,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:03:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:44,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:03:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:03:49,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640645479] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:03:49,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5479817] [2023-04-01 05:03:49,908 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 05:03:49,908 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:03:49,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:03:49,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:03:49,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:03:49,928 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:03:49,955 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 05:03:49,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:03:49,989 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:03:50,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2437#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:03:50,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:03:50,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:03:50,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2023-04-01 05:03:50,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473689823] [2023-04-01 05:03:50,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:03:50,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2023-04-01 05:03:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:03:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2023-04-01 05:03:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6282, Invalid=13458, Unknown=0, NotChecked=0, Total=19740 [2023-04-01 05:03:50,734 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 132 states, 132 states have (on average 1.053030303030303) internal successors, (139), 132 states have internal predecessors, (139), 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 05:04:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:04:01,899 INFO L93 Difference]: Finished difference Result 144 states and 207 transitions. [2023-04-01 05:04:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-04-01 05:04:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.053030303030303) internal successors, (139), 132 states have internal predecessors, (139), 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 74 [2023-04-01 05:04:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:04:01,902 INFO L225 Difference]: With dead ends: 144 [2023-04-01 05:04:01,902 INFO L226 Difference]: Without dead ends: 139 [2023-04-01 05:04:01,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15454 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=22407, Invalid=48083, Unknown=0, NotChecked=0, Total=70490 [2023-04-01 05:04:01,909 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:04:01,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:04:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-04-01 05:04:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-04-01 05:04:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 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 05:04:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2023-04-01 05:04:01,927 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 74 [2023-04-01 05:04:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:04:01,927 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2023-04-01 05:04:01,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.053030303030303) internal successors, (139), 132 states have internal predecessors, (139), 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 05:04:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2023-04-01 05:04:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-01 05:04:01,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:04:01,930 INFO L195 NwaCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:04:01,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 05:04:02,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:04:02,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:04:02,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:04:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1855387961, now seen corresponding path program 7 times [2023-04-01 05:04:02,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:04:02,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866222273] [2023-04-01 05:04:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:04:02,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:04:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:04:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:04:10,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:04:10,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866222273] [2023-04-01 05:04:10,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866222273] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:04:10,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602918694] [2023-04-01 05:04:10,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:04:10,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:04:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:04:10,594 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 05:04:10,596 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 05:04:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:04:12,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 130 conjunts are in the unsatisfiable core [2023-04-01 05:04:12,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:04:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 05:04:12,817 INFO L327 TraceCheckSpWp]: Computing backward predicates...