/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:18:02,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:18:02,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:18:02,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:18:02,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:18:02,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:18:02,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:18:02,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:18:02,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:18:02,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:18:02,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:18:02,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:18:02,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:18:02,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:18:02,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:18:02,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:18:02,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:18:02,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:18:02,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:18:02,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:18:02,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:18:02,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:18:02,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:18:02,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:18:02,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:18:02,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:18:02,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:18:02,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:18:02,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:18:02,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:18:02,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:18:02,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:18:02,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:18:02,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:18:02,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:18:02,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:18:02,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:18:02,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:18:02,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:18:02,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:18:02,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:18:02,721 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:18:02,750 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:18:02,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:18:02,751 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:18:02,751 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:18:02,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:18:02,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:18:02,752 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:18:02,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:18:02,752 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:18:02,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:18:02,753 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:18:02,753 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:18:02,753 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:18:02,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:18:02,754 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:18:02,754 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:18:02,754 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:18:02,754 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:18:02,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:18:02,755 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:18:02,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:18:02,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:18:02,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:18:02,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:18:02,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:18:02,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:18:02,756 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:18:02,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:18:02,756 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:18:02,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:18:02,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:18:02,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:18:02,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:18:02,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:18:02,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:18:02,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:18:03,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:18:03,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:18:03,008 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:18:03,008 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:18:03,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-04-01 05:18:04,108 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:18:04,297 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:18:04,298 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2023-04-01 05:18:04,303 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c60f4b1/e70494387ce640388e6861714a60f4e0/FLAG6627cfba4 [2023-04-01 05:18:04,315 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43c60f4b1/e70494387ce640388e6861714a60f4e0 [2023-04-01 05:18:04,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:18:04,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:18:04,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:18:04,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:18:04,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:18:04,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c50f39f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04, skipping insertion in model container [2023-04-01 05:18:04,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:18:04,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:18:04,489 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/egcd3-ll_unwindbound20.c[490,503] [2023-04-01 05:18:04,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:18:04,528 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:18:04,537 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/egcd3-ll_unwindbound20.c[490,503] [2023-04-01 05:18:04,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:18:04,554 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:18:04,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04 WrapperNode [2023-04-01 05:18:04,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:18:04,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:18:04,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:18:04,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:18:04,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,580 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:18:04,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:18:04,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:18:04,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:18:04,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (1/1) ... [2023-04-01 05:18:04,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:18:04,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:04,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:18:04,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:18:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:18:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:18:04,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:18:04,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:18:04,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:18:04,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:18:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:18:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:18:04,664 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:18:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:18:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:18:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:18:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:18:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:18:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:18:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:18:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:18:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:18:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:18:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:18:04,720 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:18:04,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:18:04,862 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:18:04,881 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:18:04,881 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 05:18:04,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:18:04 BoogieIcfgContainer [2023-04-01 05:18:04,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:18:04,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:18:04,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:18:04,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:18:04,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:18:04" (1/3) ... [2023-04-01 05:18:04,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e2c941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:18:04, skipping insertion in model container [2023-04-01 05:18:04,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:18:04" (2/3) ... [2023-04-01 05:18:04,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e2c941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:18:04, skipping insertion in model container [2023-04-01 05:18:04,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:18:04" (3/3) ... [2023-04-01 05:18:04,891 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2023-04-01 05:18:04,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:18:04,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:18:04,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:18:04,965 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;@2fa7179, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:18:04,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:18:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:18:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 05:18:04,975 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:04,976 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:04,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:04,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1884191244, now seen corresponding path program 1 times [2023-04-01 05:18:04,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:04,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068123033] [2023-04-01 05:18:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:04,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:05,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:05,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068123033] [2023-04-01 05:18:05,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 05:18:05,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736812385] [2023-04-01 05:18:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:05,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:05,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:05,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:05,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:18:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:05,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:18:05,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:05,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:18:05,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736812385] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:05,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:18:05,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:18:05,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773874326] [2023-04-01 05:18:05,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:18:05,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:18:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:18:05,283 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 05:18:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:05,308 INFO L93 Difference]: Finished difference Result 62 states and 94 transitions. [2023-04-01 05:18:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:18:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-04-01 05:18:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:05,316 INFO L225 Difference]: With dead ends: 62 [2023-04-01 05:18:05,317 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 05:18:05,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:18:05,322 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:05,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:18:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 05:18:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 05:18:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 05:18:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-04-01 05:18:05,356 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 17 [2023-04-01 05:18:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:05,357 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-04-01 05:18:05,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 05:18:05,357 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-04-01 05:18:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 05:18:05,358 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:05,359 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:05,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:05,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:18:05,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:05,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash 952486133, now seen corresponding path program 1 times [2023-04-01 05:18:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:05,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808537718] [2023-04-01 05:18:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:05,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:05,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639967829] [2023-04-01 05:18:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:05,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:05,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:05,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:05,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:18:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:05,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:18:05,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:05,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:18:05,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:05,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808537718] [2023-04-01 05:18:05,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:05,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639967829] [2023-04-01 05:18:05,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639967829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:05,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:18:05,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:18:05,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932797054] [2023-04-01 05:18:05,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:05,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:18:05,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:18:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:18:05,751 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:05,784 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 05:18:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:18:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2023-04-01 05:18:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:05,788 INFO L225 Difference]: With dead ends: 41 [2023-04-01 05:18:05,788 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 05:18:05,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:18:05,791 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:05,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:18:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 05:18:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 05:18:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 05:18:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-04-01 05:18:05,803 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 18 [2023-04-01 05:18:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:05,803 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-04-01 05:18:05,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-04-01 05:18:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 05:18:05,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:05,805 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:05,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:06,007 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,SelfDestructingSolverStorable1 [2023-04-01 05:18:06,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:06,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash -552718471, now seen corresponding path program 1 times [2023-04-01 05:18:06,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:06,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254940024] [2023-04-01 05:18:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:06,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:06,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:06,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43691939] [2023-04-01 05:18:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:06,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:06,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:06,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:18:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:06,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:18:06,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:18:06,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:18:06,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254940024] [2023-04-01 05:18:06,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:06,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43691939] [2023-04-01 05:18:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43691939] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:06,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:18:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:18:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661679371] [2023-04-01 05:18:06,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:06,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:18:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:18:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:18:06,118 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 05:18:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:06,183 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2023-04-01 05:18:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:18:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 05:18:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:06,188 INFO L225 Difference]: With dead ends: 54 [2023-04-01 05:18:06,188 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 05:18:06,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:18:06,191 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:06,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:18:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 05:18:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-04-01 05:18:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 05:18:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-04-01 05:18:06,205 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 19 [2023-04-01 05:18:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:06,205 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-04-01 05:18:06,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 05:18:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-04-01 05:18:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:18:06,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:06,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:06,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:06,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:06,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:06,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1491876193, now seen corresponding path program 1 times [2023-04-01 05:18:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:06,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753763804] [2023-04-01 05:18:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:06,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:06,427 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:06,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655939583] [2023-04-01 05:18:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:06,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:06,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:06,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:06,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:18:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:06,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 05:18:06,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:06,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:18:06,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753763804] [2023-04-01 05:18:06,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655939583] [2023-04-01 05:18:06,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655939583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:06,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:18:06,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:18:06,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248194007] [2023-04-01 05:18:06,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:06,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:18:06,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:18:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:18:06,585 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:06,617 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2023-04-01 05:18:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:18:06,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-01 05:18:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:06,623 INFO L225 Difference]: With dead ends: 59 [2023-04-01 05:18:06,623 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 05:18:06,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:18:06,624 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:06,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:18:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 05:18:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-01 05:18:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 05:18:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-04-01 05:18:06,630 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 24 [2023-04-01 05:18:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:06,630 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-04-01 05:18:06,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-04-01 05:18:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:18:06,632 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:06,632 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:06,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:06,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:06,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash -917044466, now seen corresponding path program 1 times [2023-04-01 05:18:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:06,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407250255] [2023-04-01 05:18:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:06,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:06,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600215263] [2023-04-01 05:18:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:06,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:06,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:06,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:06,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:18:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:06,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 05:18:06,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:18:07,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:18:07,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:07,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407250255] [2023-04-01 05:18:07,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:07,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600215263] [2023-04-01 05:18:07,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600215263] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:07,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:18:07,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 05:18:07,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474681040] [2023-04-01 05:18:07,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:07,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 05:18:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 05:18:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 05:18:07,089 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:07,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:07,186 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2023-04-01 05:18:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:18:07,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-01 05:18:07,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:07,188 INFO L225 Difference]: With dead ends: 55 [2023-04-01 05:18:07,188 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 05:18:07,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 05:18:07,189 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:07,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 149 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:18:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 05:18:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-04-01 05:18:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:18:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2023-04-01 05:18:07,201 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 24 [2023-04-01 05:18:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:07,201 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2023-04-01 05:18:07,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2023-04-01 05:18:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 05:18:07,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:07,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:07,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:07,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:07,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:07,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash -575541792, now seen corresponding path program 1 times [2023-04-01 05:18:07,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036970565] [2023-04-01 05:18:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:07,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:07,427 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:07,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427435009] [2023-04-01 05:18:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:07,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:07,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:07,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:18:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:07,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 05:18:07,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:07,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:07,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:07,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036970565] [2023-04-01 05:18:07,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:07,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427435009] [2023-04-01 05:18:07,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427435009] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:18:07,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [36972923] [2023-04-01 05:18:07,661 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:18:07,661 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:07,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:07,669 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:07,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:07,749 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:18:11,170 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2023-04-01 05:18:11,298 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 05:18:11,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:18:11,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:18:17,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 21 ~counter~0) (= |#NULL.offset| 0) (<= ~counter~0 21) (= |#NULL.base| 0))' at error location [2023-04-01 05:18:17,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:18:17,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:18:17,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 05:18:17,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065561739] [2023-04-01 05:18:17,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:18:17,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 05:18:17,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 05:18:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:18:17,092 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 05:18:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:17,286 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2023-04-01 05:18:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:18:17,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-04-01 05:18:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:17,289 INFO L225 Difference]: With dead ends: 148 [2023-04-01 05:18:17,289 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 05:18:17,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:18:17,290 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 83 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:17,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 218 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:18:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 05:18:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2023-04-01 05:18:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.3432835820895523) internal successors, (90), 69 states have internal predecessors, (90), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 05:18:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2023-04-01 05:18:17,309 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 25 [2023-04-01 05:18:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:17,309 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2023-04-01 05:18:17,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 05:18:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2023-04-01 05:18:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 05:18:17,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:17,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:17,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:17,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:17,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash -676943890, now seen corresponding path program 1 times [2023-04-01 05:18:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:17,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929395795] [2023-04-01 05:18:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:17,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:17,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:17,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277575181] [2023-04-01 05:18:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:17,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:17,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:17,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:17,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:18:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:17,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 05:18:17,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:18:17,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:18:17,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:17,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929395795] [2023-04-01 05:18:17,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:17,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277575181] [2023-04-01 05:18:17,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277575181] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:18:17,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550755098] [2023-04-01 05:18:17,677 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:18:17,677 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:17,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:17,677 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:17,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:17,697 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:18:19,940 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-04-01 05:18:19,943 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 05:18:19,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:18:19,948 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:18:24,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1730#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 05:18:24,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:18:24,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:18:24,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-04-01 05:18:24,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355725676] [2023-04-01 05:18:24,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:18:24,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:18:24,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:24,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:18:24,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:18:24,682 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:24,948 INFO L93 Difference]: Finished difference Result 184 states and 262 transitions. [2023-04-01 05:18:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:18:24,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-04-01 05:18:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:24,951 INFO L225 Difference]: With dead ends: 184 [2023-04-01 05:18:24,951 INFO L226 Difference]: Without dead ends: 172 [2023-04-01 05:18:24,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2023-04-01 05:18:24,953 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 120 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:24,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 195 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:18:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-04-01 05:18:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2023-04-01 05:18:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 96 states have internal predecessors, (129), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 05:18:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 177 transitions. [2023-04-01 05:18:24,976 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 177 transitions. Word has length 26 [2023-04-01 05:18:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:24,976 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 177 transitions. [2023-04-01 05:18:24,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 05:18:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 177 transitions. [2023-04-01 05:18:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 05:18:24,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:24,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:24,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:25,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:25,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:25,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1039050843, now seen corresponding path program 1 times [2023-04-01 05:18:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:25,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10399052] [2023-04-01 05:18:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:25,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:25,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:25,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024022024] [2023-04-01 05:18:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:25,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:25,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:25,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:25,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:18:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:25,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:18:25,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:25,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:25,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10399052] [2023-04-01 05:18:25,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024022024] [2023-04-01 05:18:25,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024022024] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:18:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678393498] [2023-04-01 05:18:25,385 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 05:18:25,385 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:25,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:25,385 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:25,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:25,408 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:18:25,596 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 14 for LOIs [2023-04-01 05:18:25,600 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 05:18:25,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:18:25,606 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:18:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [678393498] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:18:26,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:18:26,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7] total 26 [2023-04-01 05:18:26,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346718456] [2023-04-01 05:18:26,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:18:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 05:18:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 05:18:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:18:26,383 INFO L87 Difference]: Start difference. First operand 129 states and 177 transitions. Second operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 05:18:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:27,090 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2023-04-01 05:18:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 05:18:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-04-01 05:18:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:27,091 INFO L225 Difference]: With dead ends: 174 [2023-04-01 05:18:27,091 INFO L226 Difference]: Without dead ends: 130 [2023-04-01 05:18:27,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 05:18:27,093 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:27,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:18:27,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-04-01 05:18:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2023-04-01 05:18:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 96 states have internal predecessors, (127), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 05:18:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 175 transitions. [2023-04-01 05:18:27,109 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 175 transitions. Word has length 29 [2023-04-01 05:18:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:27,109 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 175 transitions. [2023-04-01 05:18:27,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 05:18:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 175 transitions. [2023-04-01 05:18:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 05:18:27,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:27,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:27,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 05:18:27,315 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,SelfDestructingSolverStorable7 [2023-04-01 05:18:27,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:27,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash -51344455, now seen corresponding path program 1 times [2023-04-01 05:18:27,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:27,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435326493] [2023-04-01 05:18:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:27,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:27,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:27,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109047253] [2023-04-01 05:18:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:27,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:27,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:27,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:27,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 05:18:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:27,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 05:18:27,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 05:18:27,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:27,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:27,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435326493] [2023-04-01 05:18:27,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:27,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109047253] [2023-04-01 05:18:27,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109047253] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:18:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143163825] [2023-04-01 05:18:27,668 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:18:27,668 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:27,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:27,669 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:27,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:27,685 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:18:29,438 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 118 for LOIs [2023-04-01 05:18:29,512 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 05:18:29,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:18:29,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:18:37,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2984#(and (<= 1 |#StackHeapBarrier|) (< ~counter~0 21) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2023-04-01 05:18:37,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:18:37,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:18:37,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-04-01 05:18:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980462405] [2023-04-01 05:18:37,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:18:37,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 05:18:37,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 05:18:37,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 05:18:37,411 INFO L87 Difference]: Start difference. First operand 129 states and 175 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 05:18:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:39,191 INFO L93 Difference]: Finished difference Result 180 states and 248 transitions. [2023-04-01 05:18:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:18:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-04-01 05:18:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:39,193 INFO L225 Difference]: With dead ends: 180 [2023-04-01 05:18:39,193 INFO L226 Difference]: Without dead ends: 178 [2023-04-01 05:18:39,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 05:18:39,194 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 85 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:39,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 297 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 05:18:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-01 05:18:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2023-04-01 05:18:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 123 states have internal predecessors, (164), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-01 05:18:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 228 transitions. [2023-04-01 05:18:39,216 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 228 transitions. Word has length 31 [2023-04-01 05:18:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:39,216 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 228 transitions. [2023-04-01 05:18:39,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 05:18:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 228 transitions. [2023-04-01 05:18:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 05:18:39,217 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:39,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:39,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:39,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:39,423 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:39,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash 486113754, now seen corresponding path program 1 times [2023-04-01 05:18:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:39,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923795294] [2023-04-01 05:18:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:39,437 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:39,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460513887] [2023-04-01 05:18:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:39,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:39,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:39,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 05:18:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:39,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 05:18:39,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 05:18:39,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:39,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:39,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923795294] [2023-04-01 05:18:39,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:39,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460513887] [2023-04-01 05:18:39,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460513887] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:18:39,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087083300] [2023-04-01 05:18:39,691 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 05:18:39,691 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:39,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:39,691 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:39,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:39,708 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:18:42,162 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-04-01 05:18:42,167 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 05:18:42,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:18:42,171 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:18:49,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3638#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 20) (= |#NULL.offset| 0) (<= 3 ~counter~0) (= |#NULL.base| 0))' at error location [2023-04-01 05:18:49,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:18:49,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:18:49,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 05:18:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554772792] [2023-04-01 05:18:49,754 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 05:18:49,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 05:18:49,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:18:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 05:18:49,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 05:18:49,755 INFO L87 Difference]: Start difference. First operand 167 states and 228 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:18:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:18:49,980 INFO L93 Difference]: Finished difference Result 190 states and 255 transitions. [2023-04-01 05:18:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 05:18:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-04-01 05:18:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:18:49,985 INFO L225 Difference]: With dead ends: 190 [2023-04-01 05:18:49,985 INFO L226 Difference]: Without dead ends: 188 [2023-04-01 05:18:49,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 05:18:49,986 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:18:49,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 206 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:18:49,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-04-01 05:18:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-04-01 05:18:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 134 states have (on average 1.328358208955224) internal successors, (178), 135 states have internal predecessors, (178), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-04-01 05:18:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 250 transitions. [2023-04-01 05:18:50,015 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 250 transitions. Word has length 36 [2023-04-01 05:18:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:18:50,016 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 250 transitions. [2023-04-01 05:18:50,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 05:18:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 250 transitions. [2023-04-01 05:18:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 05:18:50,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:18:50,023 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:18:50,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 05:18:50,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 05:18:50,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:18:50,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:18:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1371325752, now seen corresponding path program 1 times [2023-04-01 05:18:50,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:18:50,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369365301] [2023-04-01 05:18:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:50,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:18:50,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:18:50,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116039258] [2023-04-01 05:18:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:18:50,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:18:50,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:18:50,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:18:50,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 05:18:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:18:50,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 05:18:50,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:18:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 05:18:50,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:18:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 05:18:50,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:18:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369365301] [2023-04-01 05:18:50,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:18:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116039258] [2023-04-01 05:18:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116039258] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:18:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866093440] [2023-04-01 05:18:50,388 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:18:50,388 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:18:50,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:18:50,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:18:50,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:18:50,403 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-01 05:18:54,631 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 119 for LOIs [2023-04-01 05:18:54,701 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-04-01 05:18:54,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 05:18:54,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:19:03,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4431#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 21 ~counter~0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:19:03,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:19:03,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:19:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-04-01 05:19:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58001168] [2023-04-01 05:19:03,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:19:03,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:19:03,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:19:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:19:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-04-01 05:19:03,010 INFO L87 Difference]: Start difference. First operand 186 states and 250 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 05:19:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:19:03,218 INFO L93 Difference]: Finished difference Result 478 states and 661 transitions. [2023-04-01 05:19:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:19:03,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2023-04-01 05:19:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:19:03,225 INFO L225 Difference]: With dead ends: 478 [2023-04-01 05:19:03,226 INFO L226 Difference]: Without dead ends: 402 [2023-04-01 05:19:03,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 05:19:03,229 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 124 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:19:03,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 283 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:19:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-04-01 05:19:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 372. [2023-04-01 05:19:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 261 states have (on average 1.3103448275862069) internal successors, (342), 265 states have internal predecessors, (342), 84 states have call successors, (84), 27 states have call predecessors, (84), 26 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-04-01 05:19:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 505 transitions. [2023-04-01 05:19:03,287 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 505 transitions. Word has length 37 [2023-04-01 05:19:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:19:03,287 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 505 transitions. [2023-04-01 05:19:03,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 05:19:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 505 transitions. [2023-04-01 05:19:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 05:19:03,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:19:03,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:19:03,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0