/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 EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:15:11,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:15:11,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:15:11,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:15:11,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:15:11,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:15:11,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:15:11,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:15:11,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:15:11,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:15:11,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:15:11,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:15:11,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:15:11,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:15:11,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:15:11,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:15:11,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:15:11,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:15:11,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:15:11,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:15:11,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:15:11,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:15:11,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:15:11,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:15:11,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:15:11,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:15:11,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:15:11,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:15:11,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:15:11,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:15:11,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:15:11,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:15:11,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:15:11,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:15:11,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:15:11,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:15:11,759 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 11:15:11,792 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:15:11,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:15:11,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:15:11,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:15:11,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:15:11,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:15:11,794 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:15:11,794 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:15:11,794 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:15:11,794 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:15:11,795 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:15:11,795 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:15:11,796 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:15:11,796 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:15:11,796 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:15:11,796 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:15:11,796 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:15:11,796 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:15:11,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:15:11,797 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:15:11,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:15:11,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:15:11,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:15:11,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:15:11,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:15:11,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:15:11,798 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:15:11,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:15:11,798 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:15:11,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:15:11,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:15:11,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:15:11,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:15:11,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:15:11,799 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:15:11,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:15:11,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:15:11,799 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:15:11,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:15:11,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:15:11,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:15:11,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:15:12,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:15:12,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:15:12,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:15:12,029 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:15:12,030 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:15:12,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2023-04-01 11:15:13,264 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:15:13,471 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:15:13,472 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2023-04-01 11:15:13,477 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea87ae65f/82ec392c375d46c5b5ebfdad7f03f293/FLAG3103c6b3f [2023-04-01 11:15:13,489 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea87ae65f/82ec392c375d46c5b5ebfdad7f03f293 [2023-04-01 11:15:13,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:15:13,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:15:13,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:15:13,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:15:13,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:15:13,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a9fbd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13, skipping insertion in model container [2023-04-01 11:15:13,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:15:13,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:15:13,630 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/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2023-04-01 11:15:13,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:15:13,656 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:15:13,666 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/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2023-04-01 11:15:13,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:15:13,688 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:15:13,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13 WrapperNode [2023-04-01 11:15:13,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:15:13,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:15:13,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:15:13,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:15:13,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,711 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:15:13,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:15:13,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:15:13,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:15:13,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (1/1) ... [2023-04-01 11:15:13,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:15:13,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:13,746 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 11:15:13,771 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 11:15:13,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:15:13,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:15:13,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:15:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:15:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:15:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:15:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:15:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:15:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:15:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:15:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:15:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:15:13,849 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:15:13,851 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:15:14,040 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:15:14,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:15:14,074 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:15:14,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:15:14 BoogieIcfgContainer [2023-04-01 11:15:14,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:15:14,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:15:14,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:15:14,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:15:14,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:15:13" (1/3) ... [2023-04-01 11:15:14,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afd788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:15:14, skipping insertion in model container [2023-04-01 11:15:14,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:15:13" (2/3) ... [2023-04-01 11:15:14,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afd788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:15:14, skipping insertion in model container [2023-04-01 11:15:14,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:15:14" (3/3) ... [2023-04-01 11:15:14,086 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2023-04-01 11:15:14,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:15:14,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:15:14,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:15:14,151 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;@1af0da26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:15:14,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:15:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 11:15:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:15:14,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:14,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:14,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:14,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:14,166 INFO L85 PathProgramCache]: Analyzing trace with hash -36751625, now seen corresponding path program 1 times [2023-04-01 11:15:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:14,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162140158] [2023-04-01 11:15:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:14,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:14,534 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 11:15:14,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162140158] [2023-04-01 11:15:14,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162140158] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:15:14,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:15:14,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:15:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415901989] [2023-04-01 11:15:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:15:14,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:15:14,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:15:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:15:14,573 INFO L87 Difference]: Start difference. First operand has 32 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:15:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:14,750 INFO L93 Difference]: Finished difference Result 59 states and 94 transitions. [2023-04-01 11:15:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:15:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-01 11:15:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:14,759 INFO L225 Difference]: With dead ends: 59 [2023-04-01 11:15:14,759 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 11:15:14,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:15:14,769 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:14,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:15:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 11:15:14,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 11:15:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:15:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-04-01 11:15:14,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2023-04-01 11:15:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:14,821 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-04-01 11:15:14,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:15:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-04-01 11:15:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 11:15:14,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:14,823 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:14,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:15:14,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:14,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash 726531578, now seen corresponding path program 1 times [2023-04-01 11:15:14,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:14,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516094596] [2023-04-01 11:15:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:14,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:14,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:14,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878513619] [2023-04-01 11:15:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:14,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:14,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:14,863 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 11:15:14,879 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 11:15:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:14,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:15:14,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:15:15,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:15:15,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516094596] [2023-04-01 11:15:15,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878513619] [2023-04-01 11:15:15,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878513619] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:15,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575251066] [2023-04-01 11:15:15,293 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:15:15,293 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:15,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:15,301 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:15,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:15,428 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:15:15,951 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:15:15,974 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 72 for LOIs [2023-04-01 11:15:15,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:15:16,010 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1575251066] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:15:16,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:16,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 7] total 21 [2023-04-01 11:15:16,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212823381] [2023-04-01 11:15:16,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:15:16,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:15:16,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:16,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:15:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-04-01 11:15:16,752 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:15:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:19,908 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-04-01 11:15:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:15:19,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-04-01 11:15:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:19,910 INFO L225 Difference]: With dead ends: 55 [2023-04-01 11:15:19,910 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 11:15:19,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=138, Invalid=617, Unknown=1, NotChecked=0, Total=756 [2023-04-01 11:15:19,912 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:19,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 11:15:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 11:15:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 11:15:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 11:15:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2023-04-01 11:15:19,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 19 [2023-04-01 11:15:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:19,935 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2023-04-01 11:15:19,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:15:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2023-04-01 11:15:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 11:15:19,936 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:19,936 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:19,947 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 11:15:20,142 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 11:15:20,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:20,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1549398967, now seen corresponding path program 1 times [2023-04-01 11:15:20,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:20,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251530675] [2023-04-01 11:15:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:20,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:20,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:20,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455045792] [2023-04-01 11:15:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:20,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:20,178 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 11:15:20,179 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 11:15:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:20,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 11:15:20,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 11:15:20,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 11:15:20,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:20,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251530675] [2023-04-01 11:15:20,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:20,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455045792] [2023-04-01 11:15:20,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455045792] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:20,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376435473] [2023-04-01 11:15:20,480 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:15:20,480 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:20,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:20,480 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:20,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:20,525 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:15:25,622 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Solver couldn't answer isBottom for original: 85#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (<= main_~n~0 (+ main_~a~0 1)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 11))) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (= (select |#valid| 0) 0) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) abstracted: 87#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 11))) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (= (select |#valid| 0) 0) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:63) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StateBasedDomain.isEqBottom(StateBasedDomain.java:112) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 11:15:25,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:25,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-04-01 11:15:25,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786670724] [2023-04-01 11:15:25,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:25,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:15:25,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:15:25,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:15:25,633 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-01 11:15:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:25,915 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2023-04-01 11:15:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:15:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-04-01 11:15:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:25,917 INFO L225 Difference]: With dead ends: 70 [2023-04-01 11:15:25,917 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 11:15:25,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 11:15:25,918 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:25,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 59 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:15:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 11:15:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2023-04-01 11:15:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 11:15:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-04-01 11:15:25,945 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 46 [2023-04-01 11:15:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:25,946 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-04-01 11:15:25,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-01 11:15:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-04-01 11:15:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 11:15:25,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:25,949 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:25,961 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 11:15:26,155 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 11:15:26,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:26,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1775784186, now seen corresponding path program 2 times [2023-04-01 11:15:26,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:26,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406398904] [2023-04-01 11:15:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:26,166 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:26,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161435580] [2023-04-01 11:15:26,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:15:26,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:26,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:26,167 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 11:15:26,182 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 11:15:26,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 11:15:26,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:26,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 11:15:26,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 11:15:26,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-01 11:15:26,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:26,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406398904] [2023-04-01 11:15:26,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:26,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161435580] [2023-04-01 11:15:26,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161435580] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:26,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527305540] [2023-04-01 11:15:26,378 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:15:26,378 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:26,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:26,378 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:26,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:26,404 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:15:28,974 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:15:28,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 72 for LOIs [2023-04-01 11:15:28,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:15:28,995 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:31,663 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1300#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:15:31,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:15:31,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:31,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 11:15:31,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977028552] [2023-04-01 11:15:31,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:31,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:15:31,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:31,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:15:31,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:15:31,666 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 11:15:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:31,946 INFO L93 Difference]: Finished difference Result 91 states and 121 transitions. [2023-04-01 11:15:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:15:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 51 [2023-04-01 11:15:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:31,947 INFO L225 Difference]: With dead ends: 91 [2023-04-01 11:15:31,947 INFO L226 Difference]: Without dead ends: 89 [2023-04-01 11:15:31,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:15:31,949 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:31,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 156 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:15:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-04-01 11:15:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2023-04-01 11:15:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 39 states have internal predecessors, (39), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 11:15:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2023-04-01 11:15:31,984 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 51 [2023-04-01 11:15:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:31,985 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2023-04-01 11:15:31,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-01 11:15:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2023-04-01 11:15:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 11:15:31,986 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:31,986 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:31,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 11:15:32,190 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 11:15:32,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:32,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1077796183, now seen corresponding path program 3 times [2023-04-01 11:15:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163372650] [2023-04-01 11:15:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:32,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:32,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545865156] [2023-04-01 11:15:32,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:15:32,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:32,208 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 11:15:32,210 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 11:15:32,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:15:32,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:32,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 11:15:32,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 11:15:32,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-01 11:15:32,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163372650] [2023-04-01 11:15:32,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545865156] [2023-04-01 11:15:32,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545865156] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107265622] [2023-04-01 11:15:32,605 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:15:32,605 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:32,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:32,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:32,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:32,624 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:15:37,384 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Solver couldn't answer isBottom for original: 85#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (<= main_~n~0 (+ main_~a~0 1)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 11))) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (= (select |#valid| 0) 0) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) abstracted: 87#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 11))) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (= (select |#valid| 0) 0) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:63) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StateBasedDomain.isEqBottom(StateBasedDomain.java:112) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 11:15:37,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:37,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-04-01 11:15:37,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318723152] [2023-04-01 11:15:37,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 11:15:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 11:15:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:15:37,394 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-04-01 11:15:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:38,461 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-04-01 11:15:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:15:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 56 [2023-04-01 11:15:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:38,464 INFO L225 Difference]: With dead ends: 98 [2023-04-01 11:15:38,464 INFO L226 Difference]: Without dead ends: 91 [2023-04-01 11:15:38,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-04-01 11:15:38,465 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:38,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 85 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 11:15:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-01 11:15:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-04-01 11:15:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 48 states have (on average 1.0625) internal successors, (51), 51 states have internal predecessors, (51), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 11:15:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2023-04-01 11:15:38,501 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 56 [2023-04-01 11:15:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:38,501 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2023-04-01 11:15:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-04-01 11:15:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2023-04-01 11:15:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 11:15:38,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:38,503 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:38,511 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 11:15:38,708 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 11:15:38,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:38,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash -72955691, now seen corresponding path program 1 times [2023-04-01 11:15:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:38,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569403878] [2023-04-01 11:15:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:38,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:38,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680761075] [2023-04-01 11:15:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:38,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:38,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:38,718 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 11:15:38,721 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 11:15:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:38,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 11:15:38,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-01 11:15:38,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-01 11:15:39,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569403878] [2023-04-01 11:15:39,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680761075] [2023-04-01 11:15:39,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680761075] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1684337929] [2023-04-01 11:15:39,143 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 11:15:39,143 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:39,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:39,143 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:39,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:39,166 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:15:41,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:15:41,348 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 72 for LOIs [2023-04-01 11:15:41,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:15:41,363 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:15:47,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2674#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:15:47,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:15:47,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:15:47,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-04-01 11:15:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474330673] [2023-04-01 11:15:47,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:47,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 11:15:47,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 11:15:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=1, NotChecked=0, Total=812 [2023-04-01 11:15:47,258 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2023-04-01 11:15:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:47,714 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2023-04-01 11:15:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:15:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 72 [2023-04-01 11:15:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:47,716 INFO L225 Difference]: With dead ends: 108 [2023-04-01 11:15:47,716 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 11:15:47,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=144, Invalid=1045, Unknown=1, NotChecked=0, Total=1190 [2023-04-01 11:15:47,718 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:47,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 116 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:15:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 11:15:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2023-04-01 11:15:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 11:15:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2023-04-01 11:15:47,761 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 72 [2023-04-01 11:15:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:47,761 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2023-04-01 11:15:47,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2023-04-01 11:15:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2023-04-01 11:15:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 11:15:47,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:47,763 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:47,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 11:15:47,969 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 11:15:47,969 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:47,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash 638285148, now seen corresponding path program 1 times [2023-04-01 11:15:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664896640] [2023-04-01 11:15:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:47,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:47,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580120054] [2023-04-01 11:15:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:47,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:47,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:47,982 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 11:15:47,984 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 11:15:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:15:48,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 11:15:48,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-04-01 11:15:48,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:48,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:48,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664896640] [2023-04-01 11:15:48,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:48,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580120054] [2023-04-01 11:15:48,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580120054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:15:48,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654700538] [2023-04-01 11:15:48,401 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 11:15:48,401 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:48,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:48,402 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:48,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:48,420 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:15:53,318 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Solver couldn't answer isBottom for original: 85#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (<= main_~n~0 (+ main_~a~0 1)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 11))) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (= (select |#valid| 0) 0) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) abstracted: 87#(and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (not (= 7 main_~n~0)) (not (= (+ 49 main_~x~0) (+ main_~n~0 main_~y~0))) (= 13 (select |#length| 2)) (not (= (+ main_~x~0 1) main_~n~0)) (not (= main_~n~0 14)) (= 2 (select |#length| 1)) (not (= (+ main_~x~0 2) (+ main_~n~0 main_~y~0))) (= (select |#valid| 3) 1) (not (= (* main_~n~0 2) (+ main_~x~0 2))) (not (= main_~n~0 4)) (not (= (+ main_~n~0 47) main_~x~0)) (= (+ (* (* main_~n~0 main_~x~0) 2) (* main_~y~0 main_~x~0) (* main_~y~0 3)) (+ (* main_~n~0 main_~y~0) 3 (* main_~n~0 2) (* main_~x~0 16) (* main_~n~0 main_~n~0) (* main_~x~0 main_~x~0))) (not (= (+ (* main_~x~0 2) 2) (+ main_~y~0 (* main_~n~0 2)))) (not (= |#length| |#valid|)) (= (+ main_~z~0 main_~x~0) (+ 5 main_~n~0 main_~y~0)) (not (= 49 main_~n~0)) (not (= (+ main_~x~0 1) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 1))) (not (= |#StackHeapBarrier| 0)) (not (= (+ main_~x~0 4) (+ main_~n~0 main_~y~0))) (not (= main_~x~0 (+ main_~n~0 11))) (= (select |#valid| 1) 1) (not (= (+ main_~x~0 8) (+ main_~n~0 main_~y~0))) (not (= main_~n~0 13)) (not (= main_~x~0 (+ main_~n~0 2))) (not (= (+ main_~x~0 3) (+ main_~n~0 main_~y~0))) (not (= (+ main_~n~0 12) main_~x~0)) (= (select |#valid| 0) 0) (= (+ (* 2 (* main_~y~0 main_~x~0)) (* main_~y~0 8) (* main_~x~0 4) (* (* main_~n~0 main_~x~0) 2)) (+ 7 (* main_~n~0 4) (* main_~n~0 main_~n~0) (* main_~y~0 main_~y~0) (* main_~x~0 main_~x~0) (* (* main_~n~0 main_~y~0) 2))) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= main_~n~0 8)) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (not (= main_~y~0 main_~x~0)) (= (select (select |#memory_int| 1) 1) 0) (not (= (+ 5 main_~n~0) main_~x~0)) (not (= (+ main_~x~0 14) (+ main_~n~0 main_~y~0))) (= |#NULL.base| 0) (not (= main_~n~0 3))) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:63) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StateBasedDomain.isEqBottom(StateBasedDomain.java:112) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 11:15:53,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:15:53,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 11:15:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650480066] [2023-04-01 11:15:53,319 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:15:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:15:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:15:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:15:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:15:53,321 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 11:15:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:15:53,507 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2023-04-01 11:15:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:15:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 77 [2023-04-01 11:15:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:15:53,509 INFO L225 Difference]: With dead ends: 110 [2023-04-01 11:15:53,509 INFO L226 Difference]: Without dead ends: 101 [2023-04-01 11:15:53,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-04-01 11:15:53,510 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:15:53,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 86 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:15:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-01 11:15:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-04-01 11:15:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 11:15:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2023-04-01 11:15:53,550 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 77 [2023-04-01 11:15:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:15:53,550 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2023-04-01 11:15:53,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 11:15:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2023-04-01 11:15:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 11:15:53,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:15:53,552 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:15:53,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:15:53,757 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 11:15:53,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:15:53,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:15:53,757 INFO L85 PathProgramCache]: Analyzing trace with hash 914576601, now seen corresponding path program 2 times [2023-04-01 11:15:53,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:15:53,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267315149] [2023-04-01 11:15:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:15:53,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:15:53,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:15:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103146040] [2023-04-01 11:15:53,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:15:53,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:15:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:15:53,772 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 11:15:53,775 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 11:15:53,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:15:53,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:15:53,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 11:15:53,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:15:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 11:15:54,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:15:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 11:15:54,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:15:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267315149] [2023-04-01 11:15:54,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:15:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103146040] [2023-04-01 11:15:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103146040] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:15:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821671776] [2023-04-01 11:15:54,961 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 11:15:54,961 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:15:54,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:15:54,962 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:15:54,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:15:54,984 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:15:57,256 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:15:57,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 72 for LOIs [2023-04-01 11:15:57,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:15:57,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:00,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4353#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:16:00,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:16:00,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:16:00,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2023-04-01 11:16:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11010582] [2023-04-01 11:16:00,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:16:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 11:16:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 11:16:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 11:16:00,267 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2023-04-01 11:16:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:06,384 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2023-04-01 11:16:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 11:16:06,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) Word has length 104 [2023-04-01 11:16:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:06,386 INFO L225 Difference]: With dead ends: 145 [2023-04-01 11:16:06,386 INFO L226 Difference]: Without dead ends: 135 [2023-04-01 11:16:06,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 276 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 11:16:06,387 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:06,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 134 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 11:16:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-01 11:16:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-04-01 11:16:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 72 states have internal predecessors, (75), 45 states have call successors, (45), 20 states have call predecessors, (45), 19 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-04-01 11:16:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2023-04-01 11:16:06,447 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 104 [2023-04-01 11:16:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:06,447 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2023-04-01 11:16:06,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 12 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2023-04-01 11:16:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2023-04-01 11:16:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-01 11:16:06,449 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:06,449 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:06,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:06,654 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:06,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:06,654 INFO L85 PathProgramCache]: Analyzing trace with hash 211428058, now seen corresponding path program 4 times [2023-04-01 11:16:06,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:06,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532760595] [2023-04-01 11:16:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:06,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:06,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:06,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781079122] [2023-04-01 11:16:06,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:16:06,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:06,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:06,664 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:06,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:16:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:06,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 11:16:06,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 77 proven. 80 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 11:16:06,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 79 proven. 78 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2023-04-01 11:16:07,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532760595] [2023-04-01 11:16:07,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781079122] [2023-04-01 11:16:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781079122] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998431354] [2023-04-01 11:16:07,422 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:16:07,422 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:07,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:07,422 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:07,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:07,443 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:16:09,342 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:16:09,345 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 72 for LOIs [2023-04-01 11:16:09,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:16:09,364 INFO L180 IcfgInterpreter]: Interpretation finished