/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 IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:22:27,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:22:27,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:22:27,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:22:27,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:22:27,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:22:27,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:22:27,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:22:27,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:22:27,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:22:27,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:22:27,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:22:27,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:22:27,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:22:27,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:22:27,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:22:27,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:22:27,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:22:27,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:22:27,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:22:27,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:22:27,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:22:27,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:22:27,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:22:27,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:22:27,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:22:27,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:22:27,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:22:27,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:22:27,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:22:27,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:22:27,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:22:27,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:22:27,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:22:27,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:22:27,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:22:27,535 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 [2023-03-31 23:22:27,556 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:22:27,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:22:27,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:22:27,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:22:27,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:22:27,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:22:27,558 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:22:27,558 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:22:27,558 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:22:27,558 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:22:27,558 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:22:27,559 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:22:27,559 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:22:27,559 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:22:27,559 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:22:27,559 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:22:27,559 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:22:27,559 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:22:27,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:22:27,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:22:27,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:22:27,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:22:27,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:22:27,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:22:27,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:22:27,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:22:27,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:22:27,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:22:27,779 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:22:27,783 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:22:27,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2023-03-31 23:22:28,800 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:22:28,991 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:22:28,991 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound2.c [2023-03-31 23:22:28,999 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df991cc6/ad1e81635d8a49efb3955537e5cd30c0/FLAG0e86063ab [2023-03-31 23:22:29,389 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5df991cc6/ad1e81635d8a49efb3955537e5cd30c0 [2023-03-31 23:22:29,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:22:29,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:22:29,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:22:29,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:22:29,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:22:29,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bad43b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29, skipping insertion in model container [2023-03-31 23:22:29,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:22:29,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:22:29,542 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/hard2_valuebound2.c[526,539] [2023-03-31 23:22:29,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:22:29,557 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:22:29,566 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/hard2_valuebound2.c[526,539] [2023-03-31 23:22:29,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:22:29,588 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:22:29,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29 WrapperNode [2023-03-31 23:22:29,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:22:29,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:22:29,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:22:29,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:22:29,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:22:29,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:22:29,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:22:29,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:22:29,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (1/1) ... [2023-03-31 23:22:29,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:22:29,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:29,643 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) [2023-03-31 23:22:29,645 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 [2023-03-31 23:22:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:22:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:22:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:22:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:22:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:22:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:22:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:22:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:22:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:22:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:22:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:22:29,722 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:22:29,723 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:22:29,893 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:22:29,927 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:22:29,928 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:22:29,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:22:29 BoogieIcfgContainer [2023-03-31 23:22:29,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:22:29,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:22:29,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:22:29,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:22:29,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:22:29" (1/3) ... [2023-03-31 23:22:29,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b2b057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:22:29, skipping insertion in model container [2023-03-31 23:22:29,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:29" (2/3) ... [2023-03-31 23:22:29,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b2b057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:22:29, skipping insertion in model container [2023-03-31 23:22:29,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:22:29" (3/3) ... [2023-03-31 23:22:29,941 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2023-03-31 23:22:29,956 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:22:29,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:22:30,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:22:30,012 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;@773d109f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:22:30,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:22:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:22:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 23:22:30,024 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:30,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:30,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:30,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:30,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1934292817, now seen corresponding path program 1 times [2023-03-31 23:22:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:30,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424625581] [2023-03-31 23:22:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:30,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:22:30,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:30,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424625581] [2023-03-31 23:22:30,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424625581] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:22:30,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:22:30,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:22:30,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878230898] [2023-03-31 23:22:30,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:22:30,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:22:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:22:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:30,365 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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) [2023-03-31 23:22:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:30,455 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2023-03-31 23:22:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:22:30,457 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 [2023-03-31 23:22:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:30,462 INFO L225 Difference]: With dead ends: 63 [2023-03-31 23:22:30,462 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 23:22:30,465 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 [2023-03-31 23:22:30,467 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:30,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:22:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 23:22:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-03-31 23:22:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:22:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-03-31 23:22:30,503 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-03-31 23:22:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:30,504 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-03-31 23:22:30,505 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) [2023-03-31 23:22:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-03-31 23:22:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 23:22:30,506 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:30,507 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:30,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:22:30,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:30,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash 667189618, now seen corresponding path program 1 times [2023-03-31 23:22:30,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:30,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571654244] [2023-03-31 23:22:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:22:30,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:30,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571654244] [2023-03-31 23:22:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571654244] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:22:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:22:30,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:22:30,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555005040] [2023-03-31 23:22:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:22:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:22:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:22:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:30,588 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:22:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:30,650 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-03-31 23:22:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:22:30,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-03-31 23:22:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:30,651 INFO L225 Difference]: With dead ends: 42 [2023-03-31 23:22:30,651 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 23:22:30,652 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 [2023-03-31 23:22:30,652 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:30,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:22:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 23:22:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-03-31 23:22:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:22:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-03-31 23:22:30,660 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2023-03-31 23:22:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:30,660 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-03-31 23:22:30,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:22:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-03-31 23:22:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:22:30,661 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:30,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:30,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:22:30,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:30,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash 203307953, now seen corresponding path program 1 times [2023-03-31 23:22:30,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:30,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505646784] [2023-03-31 23:22:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:30,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:30,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:30,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142227715] [2023-03-31 23:22:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:30,684 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) [2023-03-31 23:22:30,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:22:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:30,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:22:30,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:22:30,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:22:30,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:30,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505646784] [2023-03-31 23:22:30,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:30,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142227715] [2023-03-31 23:22:30,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142227715] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:30,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610027901] [2023-03-31 23:22:30,989 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 23:22:30,990 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:30,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:30,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:30,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:31,091 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:31,287 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:22:31,294 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:31,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:31,319 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:31,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '459#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:22:31,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:31,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:31,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-03-31 23:22:31,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875130692] [2023-03-31 23:22:31,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:31,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:22:31,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:22:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:22:31,606 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 23:22:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:32,045 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-03-31 23:22:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:22:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2023-03-31 23:22:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:32,047 INFO L225 Difference]: With dead ends: 68 [2023-03-31 23:22:32,047 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 23:22:32,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:22:32,049 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:32,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:22:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 23:22:32,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-03-31 23:22:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 23:22:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-03-31 23:22:32,058 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 24 [2023-03-31 23:22:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:32,059 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-03-31 23:22:32,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 23:22:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-03-31 23:22:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 23:22:32,059 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:32,060 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:32,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:22:32,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:32,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:32,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash -421588801, now seen corresponding path program 1 times [2023-03-31 23:22:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:32,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096666420] [2023-03-31 23:22:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:32,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:32,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910055664] [2023-03-31 23:22:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:32,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:32,285 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) [2023-03-31 23:22:32,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:22:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:32,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:22:32,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:22:32,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:22:32,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:32,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096666420] [2023-03-31 23:22:32,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:32,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910055664] [2023-03-31 23:22:32,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910055664] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:32,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342374736] [2023-03-31 23:22:32,510 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:22:32,510 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:32,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:32,510 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:32,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:32,537 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:32,680 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:22:32,688 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:32,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:32,699 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:33,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '861#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:22:33,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:33,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-03-31 23:22:33,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081480961] [2023-03-31 23:22:33,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:33,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:22:33,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:22:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:22:33,045 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 23:22:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:33,157 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-03-31 23:22:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:22:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 31 [2023-03-31 23:22:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:33,159 INFO L225 Difference]: With dead ends: 64 [2023-03-31 23:22:33,159 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 23:22:33,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:22:33,160 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:33,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:22:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 23:22:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-03-31 23:22:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:22:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2023-03-31 23:22:33,168 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 31 [2023-03-31 23:22:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:33,168 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2023-03-31 23:22:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 23:22:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2023-03-31 23:22:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 23:22:33,169 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:33,169 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2023-03-31 23:22:33,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:33,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 23:22:33,370 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:33,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1494414942, now seen corresponding path program 1 times [2023-03-31 23:22:33,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:33,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581924538] [2023-03-31 23:22:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:33,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:33,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:33,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257974934] [2023-03-31 23:22:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:33,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:33,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:33,381 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) [2023-03-31 23:22:33,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:22:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:33,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 23:22:33,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:22:33,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:22:35,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:35,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581924538] [2023-03-31 23:22:35,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:35,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257974934] [2023-03-31 23:22:35,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257974934] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:35,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8652595] [2023-03-31 23:22:35,245 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:22:35,245 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:35,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:35,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:35,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:35,265 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:35,739 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:22:35,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:35,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:35,751 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:36,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:22:36,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:36,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:36,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-03-31 23:22:36,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28299281] [2023-03-31 23:22:36,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:36,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 23:22:36,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:36,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 23:22:36,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:22:36,013 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-03-31 23:22:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:36,911 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2023-03-31 23:22:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:22:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 60 [2023-03-31 23:22:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:36,913 INFO L225 Difference]: With dead ends: 107 [2023-03-31 23:22:36,913 INFO L226 Difference]: Without dead ends: 95 [2023-03-31 23:22:36,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:22:36,914 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:36,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 23:22:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-03-31 23:22:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2023-03-31 23:22:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-31 23:22:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2023-03-31 23:22:36,946 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 60 [2023-03-31 23:22:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:36,946 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2023-03-31 23:22:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-03-31 23:22:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2023-03-31 23:22:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 23:22:36,947 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:36,948 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 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] [2023-03-31 23:22:36,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:37,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:37,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:37,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:37,149 INFO L85 PathProgramCache]: Analyzing trace with hash 724402433, now seen corresponding path program 2 times [2023-03-31 23:22:37,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:37,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558881585] [2023-03-31 23:22:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:37,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:37,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:37,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144182748] [2023-03-31 23:22:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:22:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:37,158 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) [2023-03-31 23:22:37,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:22:37,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:22:37,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:22:37,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 23:22:37,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-03-31 23:22:37,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-03-31 23:22:38,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:38,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558881585] [2023-03-31 23:22:38,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:38,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144182748] [2023-03-31 23:22:38,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144182748] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:38,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164845644] [2023-03-31 23:22:38,789 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:22:38,790 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:38,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:38,790 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:38,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:38,807 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:39,190 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:22:39,195 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:39,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:39,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:39,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2154#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:22:39,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:39,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:39,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-03-31 23:22:39,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943689217] [2023-03-31 23:22:39,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:39,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:22:39,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:39,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:22:39,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:22:39,472 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) [2023-03-31 23:22:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:41,223 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2023-03-31 23:22:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:22:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) Word has length 65 [2023-03-31 23:22:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:41,225 INFO L225 Difference]: With dead ends: 117 [2023-03-31 23:22:41,225 INFO L226 Difference]: Without dead ends: 98 [2023-03-31 23:22:41,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:22:41,226 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:41,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 151 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 23:22:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-03-31 23:22:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-03-31 23:22:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 23:22:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2023-03-31 23:22:41,252 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 65 [2023-03-31 23:22:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:41,253 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2023-03-31 23:22:41,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) [2023-03-31 23:22:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2023-03-31 23:22:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 23:22:41,254 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:41,254 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 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] [2023-03-31 23:22:41,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:41,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:41,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:41,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:41,463 INFO L85 PathProgramCache]: Analyzing trace with hash 920785569, now seen corresponding path program 1 times [2023-03-31 23:22:41,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:41,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047422157] [2023-03-31 23:22:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:41,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:41,470 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:41,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850208092] [2023-03-31 23:22:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:41,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:41,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:41,472 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) [2023-03-31 23:22:41,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:22:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:41,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 23:22:41,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-03-31 23:22:41,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-03-31 23:22:42,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047422157] [2023-03-31 23:22:42,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850208092] [2023-03-31 23:22:42,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850208092] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719930072] [2023-03-31 23:22:42,141 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 23:22:42,141 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:42,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:42,141 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:42,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:42,155 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:42,527 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:22:42,529 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:42,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:42,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:42,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2933#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:22:42,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:42,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-03-31 23:22:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715578552] [2023-03-31 23:22:42,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:42,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 23:22:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 23:22:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:22:42,811 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-03-31 23:22:45,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:22:46,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 23:22:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:46,932 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2023-03-31 23:22:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:22:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2023-03-31 23:22:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:46,934 INFO L225 Difference]: With dead ends: 118 [2023-03-31 23:22:46,934 INFO L226 Difference]: Without dead ends: 103 [2023-03-31 23:22:46,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:22:46,935 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:46,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 292 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 23:22:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-03-31 23:22:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2023-03-31 23:22:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-03-31 23:22:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2023-03-31 23:22:46,951 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 71 [2023-03-31 23:22:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:46,951 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2023-03-31 23:22:46,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-03-31 23:22:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2023-03-31 23:22:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 23:22:46,952 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:46,952 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1] [2023-03-31 23:22:46,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 23:22:47,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:47,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:47,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash -248496609, now seen corresponding path program 1 times [2023-03-31 23:22:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:47,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286737937] [2023-03-31 23:22:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:47,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:47,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428185176] [2023-03-31 23:22:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:47,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:47,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:47,201 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) [2023-03-31 23:22:47,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:22:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:47,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 23:22:47,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-03-31 23:22:47,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:22:47,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286737937] [2023-03-31 23:22:47,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428185176] [2023-03-31 23:22:47,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428185176] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:22:47,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:22:47,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:22:47,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705661492] [2023-03-31 23:22:47,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:22:47,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:22:47,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:47,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:22:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:47,289 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 23:22:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:47,338 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2023-03-31 23:22:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:22:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2023-03-31 23:22:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:47,339 INFO L225 Difference]: With dead ends: 96 [2023-03-31 23:22:47,339 INFO L226 Difference]: Without dead ends: 84 [2023-03-31 23:22:47,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:47,340 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:47,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 104 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:22:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-03-31 23:22:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-03-31 23:22:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 23:22:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2023-03-31 23:22:47,362 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 81 [2023-03-31 23:22:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:47,364 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2023-03-31 23:22:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 23:22:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2023-03-31 23:22:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-03-31 23:22:47,370 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:47,370 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:47,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:47,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:47,577 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:47,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2082694307, now seen corresponding path program 3 times [2023-03-31 23:22:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:47,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318535562] [2023-03-31 23:22:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:47,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:47,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526317885] [2023-03-31 23:22:47,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:22:47,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:47,594 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:22:47,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:22:47,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:22:47,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:22:47,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 46 conjunts are in the unsatisfiable core [2023-03-31 23:22:47,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-03-31 23:22:48,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:54,605 WARN L223 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 42 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:22:54,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318535562] [2023-03-31 23:22:54,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526317885] [2023-03-31 23:22:54,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526317885] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:22:54,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952385118] [2023-03-31 23:22:54,645 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:22:54,645 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:54,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:54,646 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:54,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:54,662 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:55,087 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:22:55,090 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:55,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:55,098 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:55,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4072#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:22:55,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:55,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:22:55,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-03-31 23:22:55,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541181654] [2023-03-31 23:22:55,363 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:55,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 23:22:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 23:22:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:22:55,364 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-03-31 23:22:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:55,678 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2023-03-31 23:22:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:22:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 89 [2023-03-31 23:22:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:55,679 INFO L225 Difference]: With dead ends: 143 [2023-03-31 23:22:55,679 INFO L226 Difference]: Without dead ends: 94 [2023-03-31 23:22:55,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:22:55,680 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:55,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 132 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:22:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-03-31 23:22:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2023-03-31 23:22:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.037037037037037) internal successors, (56), 56 states have internal predecessors, (56), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-03-31 23:22:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2023-03-31 23:22:55,698 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 89 [2023-03-31 23:22:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:55,698 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2023-03-31 23:22:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-03-31 23:22:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2023-03-31 23:22:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-03-31 23:22:55,700 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:55,700 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:55,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:55,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:55,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:55,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1919737504, now seen corresponding path program 4 times [2023-03-31 23:22:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129165261] [2023-03-31 23:22:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:55,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:55,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250179182] [2023-03-31 23:22:55,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:22:55,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:55,917 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) [2023-03-31 23:22:55,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:22:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:55,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2023-03-31 23:22:55,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-03-31 23:22:56,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:23:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-03-31 23:23:17,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:23:17,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129165261] [2023-03-31 23:23:17,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:23:17,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250179182] [2023-03-31 23:23:17,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250179182] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:23:17,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200965164] [2023-03-31 23:23:17,581 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:23:17,581 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:23:17,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:23:17,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:23:17,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:23:17,598 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:23:17,941 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:23:17,943 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:23:17,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:23:17,950 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:23:18,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5007#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:23:18,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:23:18,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:23:18,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-03-31 23:23:18,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689969816] [2023-03-31 23:23:18,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:23:18,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:23:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:23:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:23:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:23:18,247 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 7 states have call predecessors, (30), 9 states have call successors, (30) [2023-03-31 23:23:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:23:18,577 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2023-03-31 23:23:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:23:18,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 7 states have call predecessors, (30), 9 states have call successors, (30) Word has length 94 [2023-03-31 23:23:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:23:18,579 INFO L225 Difference]: With dead ends: 104 [2023-03-31 23:23:18,579 INFO L226 Difference]: Without dead ends: 89 [2023-03-31 23:23:18,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:23:18,580 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:23:18,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 156 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:23:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-03-31 23:23:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-03-31 23:23:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 55 states have (on average 1.0) internal successors, (55), 55 states have internal predecessors, (55), 19 states have call successors, (19), 16 states have call predecessors, (19), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-31 23:23:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2023-03-31 23:23:18,595 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 94 [2023-03-31 23:23:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:23:18,597 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2023-03-31 23:23:18,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 7 states have call predecessors, (30), 9 states have call successors, (30) [2023-03-31 23:23:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2023-03-31 23:23:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 23:23:18,598 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:23:18,598 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:23:18,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 23:23:18,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 23:23:18,809 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:23:18,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:23:18,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1365671168, now seen corresponding path program 2 times [2023-03-31 23:23:18,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:23:18,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386180583] [2023-03-31 23:23:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:23:18,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:23:18,820 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:23:18,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499587014] [2023-03-31 23:23:18,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:23:18,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:23:18,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:23:18,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:23:18,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:23:18,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 23:23:18,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:23:18,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 23:23:18,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:23:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 113 proven. 39 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-03-31 23:23:18,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:23:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2023-03-31 23:23:19,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:23:19,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386180583] [2023-03-31 23:23:19,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:23:19,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499587014] [2023-03-31 23:23:19,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499587014] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:23:19,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1895999024] [2023-03-31 23:23:19,113 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 23:23:19,113 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:23:19,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:23:19,113 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:23:19,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:23:19,136 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:23:19,515 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:23:19,517 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:23:19,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:23:19,523 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:23:19,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5916#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:23:19,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:23:19,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:23:19,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-03-31 23:23:19,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375271719] [2023-03-31 23:23:19,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:23:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:23:19,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:23:19,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:23:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:23:19,784 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-03-31 23:23:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:23:19,983 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2023-03-31 23:23:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:23:19,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 100 [2023-03-31 23:23:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:23:19,984 INFO L225 Difference]: With dead ends: 89 [2023-03-31 23:23:19,984 INFO L226 Difference]: Without dead ends: 0 [2023-03-31 23:23:19,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:23:19,985 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:23:19,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 86 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:23:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-31 23:23:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-31 23:23:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-03-31 23:23:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-31 23:23:19,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2023-03-31 23:23:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:23:19,985 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-31 23:23:19,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2023-03-31 23:23:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-31 23:23:19,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-31 23:23:19,987 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 23:23:19,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 23:23:20,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:23:20,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-03-31 23:23:20,781 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2023-03-31 23:23:20,781 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 8) no Hoare annotation was computed. [2023-03-31 23:23:20,781 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 13) the Hoare annotation is: true [2023-03-31 23:23:20,782 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2023-03-31 23:23:20,782 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= main_~d~0 1)) (.cse1 (= main_~B~0 1)) (.cse2 (= main_~p~0 1))) (or (and (= main_~A~0 (+ main_~q~0 main_~r~0)) .cse0 .cse1 .cse2) (and .cse0 (= main_~q~0 0) .cse1 .cse2))) [2023-03-31 23:23:20,782 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 22 61) no Hoare annotation was computed. [2023-03-31 23:23:20,782 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 44 56) the Hoare annotation is: (let ((.cse3 (= main_~p~0 2)) (.cse5 (= main_~d~0 2)) (.cse9 (= main_~A~0 main_~r~0)) (.cse10 (= main_~q~0 0)) (.cse0 (= main_~q~0 2)) (.cse1 (<= 0 main_~r~0)) (.cse2 (= main_~A~0 (+ main_~r~0 2))) (.cse4 (<= main_~A~0 2)) (.cse7 (= main_~d~0 1)) (.cse6 (= main_~B~0 1)) (.cse8 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and (= main_~A~0 (+ main_~r~0 1)) (<= 1 main_~A~0) .cse7 .cse6 (= main_~q~0 1) .cse8) (and .cse9 (= main_~d~0 4) .cse4 (<= 2 main_~r~0) .cse10 .cse6 (= main_~p~0 4)) (and .cse9 .cse3 (<= 1 main_~r~0) .cse5 .cse10 .cse6) (and .cse9 .cse7 .cse10 .cse6 .cse8) (and .cse0 .cse1 .cse2 .cse4 .cse7 .cse6 .cse8))) [2023-03-31 23:23:20,782 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2023-03-31 23:23:20,782 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~d~0 1)) (.cse1 (= main_~B~0 1)) (.cse2 (= main_~p~0 1))) (or (and (= main_~A~0 (+ main_~r~0 1)) (<= 1 main_~A~0) .cse0 .cse1 (= main_~q~0 1) .cse2) (and (= main_~A~0 (+ main_~q~0 main_~r~0)) (<= 0 main_~A~0) (<= main_~A~0 2) .cse0 .cse1 .cse2) (and (= main_~A~0 main_~r~0) .cse0 (= main_~q~0 0) .cse1 .cse2))) [2023-03-31 23:23:20,782 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 22 61) the Hoare annotation is: true [2023-03-31 23:23:20,782 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~A~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 (= main_~d~0 4) .cse1 (<= 2 main_~r~0) .cse2 .cse3 (= main_~p~0 4)) (and .cse0 (= main_~p~0 2) .cse1 (<= 1 main_~r~0) (= main_~d~0 2) .cse2 .cse3) (and (<= 0 main_~A~0) .cse0 .cse1 (= main_~d~0 1) .cse2 .cse3 (= main_~p~0 1)))) [2023-03-31 23:23:20,782 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~A~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 (= main_~d~0 4) .cse1 (<= 2 main_~r~0) .cse2 .cse3 (= main_~p~0 4)) (and .cse0 (= main_~p~0 2) .cse1 (<= 1 main_~r~0) (= main_~d~0 2) .cse2 .cse3) (and (<= 0 main_~A~0) .cse0 .cse1 (= main_~d~0 1) .cse2 .cse3 (= main_~p~0 1)))) [2023-03-31 23:23:20,782 INFO L899 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2023-03-31 23:23:20,782 INFO L902 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2023-03-31 23:23:20,782 INFO L899 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2023-03-31 23:23:20,782 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse3 (= main_~p~0 2)) (.cse5 (= main_~d~0 2)) (.cse9 (= main_~A~0 main_~r~0)) (.cse10 (= main_~q~0 0)) (.cse0 (= main_~q~0 2)) (.cse1 (<= 0 main_~r~0)) (.cse2 (= main_~A~0 (+ main_~r~0 2))) (.cse4 (<= main_~A~0 2)) (.cse7 (= main_~d~0 1)) (.cse6 (= main_~B~0 1)) (.cse8 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and (= main_~A~0 (+ main_~r~0 1)) (<= 1 main_~A~0) .cse7 .cse6 (= main_~q~0 1) .cse8) (and .cse9 (= main_~d~0 4) .cse4 (<= 2 main_~r~0) .cse10 .cse6 (= main_~p~0 4)) (and .cse9 .cse3 (<= 1 main_~r~0) .cse5 .cse10 .cse6) (and .cse9 .cse7 .cse10 .cse6 .cse8) (and .cse0 .cse1 .cse2 .cse4 .cse7 .cse6 .cse8))) [2023-03-31 23:23:20,783 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse0 (= main_~p~0 2)) (.cse2 (= main_~d~0 2)) (.cse1 (<= main_~A~0 2)) (.cse6 (= main_~A~0 main_~r~0)) (.cse4 (= main_~d~0 1)) (.cse7 (= main_~q~0 0)) (.cse3 (= main_~B~0 1)) (.cse5 (= main_~p~0 1))) (or (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~A~0 (+ main_~r~0 2)) .cse0 .cse1 .cse2 .cse3) (and (= main_~A~0 (+ main_~r~0 1)) (<= 1 main_~A~0) .cse4 .cse3 (= main_~q~0 1) .cse5) (and .cse6 (= main_~d~0 4) .cse1 (<= 2 main_~r~0) .cse7 .cse3 (= main_~p~0 4)) (and .cse6 .cse0 (<= 1 main_~r~0) .cse2 .cse7 .cse3) (and (= main_~A~0 (+ main_~q~0 main_~r~0)) (<= 0 main_~A~0) .cse1 .cse4 .cse3 .cse5) (and .cse6 .cse4 .cse7 .cse3 .cse5))) [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~A~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 (= main_~d~0 4) .cse1 (<= 2 main_~r~0) .cse2 .cse3 (= main_~p~0 4)) (and .cse0 (= main_~p~0 2) .cse1 (<= 1 main_~r~0) (= main_~d~0 2) .cse2 .cse3) (and (<= 0 main_~A~0) .cse0 .cse1 (= main_~d~0 1) .cse2 .cse3 (= main_~p~0 1)))) [2023-03-31 23:23:20,783 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= main_~A~0 2)) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~B~0 1))) (or (and .cse0 (= main_~d~0 4) .cse1 (<= 2 main_~r~0) .cse2 .cse3 (= main_~p~0 4)) (and .cse0 (= main_~p~0 2) .cse1 (<= 1 main_~r~0) (= main_~d~0 2) .cse2 .cse3) (and (<= 0 main_~A~0) .cse0 .cse1 (= main_~d~0 1) .cse2 .cse3 (= main_~p~0 1)))) [2023-03-31 23:23:20,783 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-03-31 23:23:20,783 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-03-31 23:23:20,784 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-03-31 23:23:20,786 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1] [2023-03-31 23:23:20,787 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 23:23:20,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 11:23:20 BoogieIcfgContainer [2023-03-31 23:23:20,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 23:23:20,798 INFO L158 Benchmark]: Toolchain (without parser) took 51405.83ms. Allocated memory was 297.8MB in the beginning and 357.6MB in the end (delta: 59.8MB). Free memory was 258.3MB in the beginning and 211.9MB in the end (delta: 46.4MB). Peak memory consumption was 207.5MB. Max. memory is 8.0GB. [2023-03-31 23:23:20,798 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 23:23:20,798 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.08ms. Allocated memory is still 297.8MB. Free memory was 258.3MB in the beginning and 247.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 23:23:20,798 INFO L158 Benchmark]: Boogie Preprocessor took 25.80ms. Allocated memory is still 297.8MB. Free memory was 247.8MB in the beginning and 246.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 23:23:20,798 INFO L158 Benchmark]: RCFGBuilder took 314.11ms. Allocated memory is still 297.8MB. Free memory was 246.2MB in the beginning and 232.6MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-03-31 23:23:20,798 INFO L158 Benchmark]: TraceAbstraction took 50866.54ms. Allocated memory was 297.8MB in the beginning and 357.6MB in the end (delta: 59.8MB). Free memory was 232.1MB in the beginning and 211.9MB in the end (delta: 20.1MB). Peak memory consumption was 181.2MB. Max. memory is 8.0GB. [2023-03-31 23:23:20,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.08ms. Allocated memory is still 297.8MB. Free memory was 258.3MB in the beginning and 247.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.80ms. Allocated memory is still 297.8MB. Free memory was 247.8MB in the beginning and 246.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 314.11ms. Allocated memory is still 297.8MB. Free memory was 246.2MB in the beginning and 232.6MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 50866.54ms. Allocated memory was 297.8MB in the beginning and 357.6MB in the end (delta: 59.8MB). Free memory was 232.1MB in the beginning and 211.9MB in the end (delta: 20.1MB). Peak memory consumption was 181.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 50.8s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 283 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 229 mSDsluCounter, 1161 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 873 mSDsCounter, 266 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2057 IncrementalHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 266 mSolverCounterUnsat, 288 mSDtfsCounter, 2057 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1630 GetRequests, 1392 SyntacticMatches, 10 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=6, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 36 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 77 PreInvPairs, 113 NumberOfFragments, 741 HoareAnnotationTreeSize, 77 FomulaSimplifications, 8252 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 16 FomulaSimplificationsInter, 129 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 33.5s InterpolantComputationTime, 648 NumberOfCodeBlocks, 580 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1075 ConstructedInterpolants, 0 QuantifiedInterpolants, 13257 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1537 ConjunctsInSsa, 241 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 3100/3534 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: ((((((((((q == 2 && 0 <= r) && A == r + 2) && p == 2) && A <= 2) && d == 2) && B == 1) || (((((A == r + 1 && 1 <= A) && d == 1) && B == 1) && q == 1) && p == 1)) || ((((((A == r && d == 4) && A <= 2) && 2 <= r) && q == 0) && B == 1) && p == 4)) || (((((A == r && p == 2) && 1 <= r) && d == 2) && q == 0) && B == 1)) || ((((A == r && d == 1) && q == 0) && B == 1) && p == 1)) || ((((((q == 2 && 0 <= r) && A == r + 2) && A <= 2) && d == 1) && B == 1) && p == 1) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((A == r && d == 4) && A <= 2) && 2 <= r) && q == 0) && B == 1) && p == 4) || ((((((A == r && p == 2) && A <= 2) && 1 <= r) && d == 2) && q == 0) && B == 1)) || ((((((0 <= A && A == r) && A <= 2) && d == 1) && q == 0) && B == 1) && p == 1) RESULT: Ultimate proved your program to be correct! [2023-03-31 23:23:20,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...