/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/float-benchs/feedback_diverge.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:19:56,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:19:56,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:19:56,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:19:56,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:19:56,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:19:56,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:19:56,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:19:56,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:19:56,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:19:56,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:19:56,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:19:56,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:19:56,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:19:56,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:19:56,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:19:56,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:19:56,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:19:56,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:19:56,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:19:56,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:19:56,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:19:56,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:19:56,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:19:56,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:19:56,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:19:56,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:19:56,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:19:56,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:19:56,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:19:56,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:19:56,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:19:56,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:19:56,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:19:56,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:19:56,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:19:56,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:19:56,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:19:56,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:19:56,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:19:56,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:19:56,680 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 [2023-04-02 21:19:56,705 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:19:56,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:19:56,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:19:56,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:19:56,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:19:56,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:19:56,707 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:19:56,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:19:56,707 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:19:56,707 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:19:56,708 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:19:56,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:19:56,708 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:19:56,708 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:19:56,708 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:19:56,708 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:19:56,709 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:19:56,709 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:19:56,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:19:56,709 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:19:56,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:19:56,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:19:56,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:19:56,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:19:56,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:19:56,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:19:56,710 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:19:56,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:19:56,710 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:19:56,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:19:56,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:19:56,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:19:56,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:19:56,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:19:56,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:19:56,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:19:56,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:19:56,900 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:19:56,900 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:19:56,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/feedback_diverge.c [2023-04-02 21:19:57,878 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:19:58,062 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:19:58,063 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/feedback_diverge.c [2023-04-02 21:19:58,067 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb6467aa/e4973a46b2fa4f3e82950d390d4adf11/FLAG3fd266fc1 [2023-04-02 21:19:58,076 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb6467aa/e4973a46b2fa4f3e82950d390d4adf11 [2023-04-02 21:19:58,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:19:58,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:19:58,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:19:58,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:19:58,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:19:58,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61fd1db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58, skipping insertion in model container [2023-04-02 21:19:58,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:19:58,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:19:58,192 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/float-benchs/feedback_diverge.c[626,639] [2023-04-02 21:19:58,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:19:58,207 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:19:58,214 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/float-benchs/feedback_diverge.c[626,639] [2023-04-02 21:19:58,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:19:58,225 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:19:58,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58 WrapperNode [2023-04-02 21:19:58,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:19:58,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:19:58,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:19:58,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:19:58,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:19:58,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:19:58,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:19:58,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:19:58,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (1/1) ... [2023-04-02 21:19:58,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:19:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:19:58,269 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) [2023-04-02 21:19:58,271 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 [2023-04-02 21:19:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:19:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:19:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:19:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 21:19:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 21:19:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_clock [2023-04-02 21:19:58,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:19:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:19:58,297 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_clock [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:19:58,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:19:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:19:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:19:58,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:19:58,347 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:19:58,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:19:58,507 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:19:58,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:19:58,524 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 21:19:58,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:19:58 BoogieIcfgContainer [2023-04-02 21:19:58,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:19:58,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:19:58,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:19:58,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:19:58,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:19:58" (1/3) ... [2023-04-02 21:19:58,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ae39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:19:58, skipping insertion in model container [2023-04-02 21:19:58,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:19:58" (2/3) ... [2023-04-02 21:19:58,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ae39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:19:58, skipping insertion in model container [2023-04-02 21:19:58,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:19:58" (3/3) ... [2023-04-02 21:19:58,536 INFO L112 eAbstractionObserver]: Analyzing ICFG feedback_diverge.c [2023-04-02 21:19:58,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:19:58,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:19:58,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:19:58,599 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;@7b1a5284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:19:58,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:19:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 21:19:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 21:19:58,607 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:19:58,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:19:58,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:19:58,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:19:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1853831179, now seen corresponding path program 1 times [2023-04-02 21:19:58,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:19:58,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582792357] [2023-04-02 21:19:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:19:58,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:19:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:19:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:19:58,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:19:58,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582792357] [2023-04-02 21:19:58,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582792357] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:19:58,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:19:58,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 21:19:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445172597] [2023-04-02 21:19:58,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:19:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 21:19:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:19:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 21:19:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:19:58,772 INFO L87 Difference]: Start difference. First operand has 26 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:19:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:19:58,804 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-04-02 21:19:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 21:19:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-02 21:19:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:19:58,810 INFO L225 Difference]: With dead ends: 43 [2023-04-02 21:19:58,811 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 21:19:58,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 21:19:58,818 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:19:58,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:19:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 21:19:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2023-04-02 21:19:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 21:19:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-02 21:19:58,843 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2023-04-02 21:19:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:19:58,843 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-02 21:19:58,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 21:19:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-02 21:19:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 21:19:58,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:19:58,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:19:58,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:19:58,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:19:58,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:19:58,845 INFO L85 PathProgramCache]: Analyzing trace with hash 383234773, now seen corresponding path program 1 times [2023-04-02 21:19:58,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:19:58,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931480823] [2023-04-02 21:19:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:19:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:19:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:19:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:19:58,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:19:58,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931480823] [2023-04-02 21:19:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931480823] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:19:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385538069] [2023-04-02 21:19:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:19:58,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:19:58,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:19:58,929 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) [2023-04-02 21:19:58,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:19:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:19:58,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 21:19:59,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:19:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:19:59,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:19:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:19:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385538069] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:19:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098116375] [2023-04-02 21:19:59,093 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:19:59,094 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:19:59,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:19:59,099 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:19:59,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:19:59,225 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:19:59,456 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:19:59,467 INFO L197 IcfgInterpreter]: Interpreting procedure wait_for_clock with input of size 9 for LOIs [2023-04-02 21:19:59,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:19:59,473 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:19:59,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '230#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:19:59,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:19:59,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:19:59,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 21:19:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490485326] [2023-04-02 21:19:59,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:19:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 21:19:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:19:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 21:19:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-02 21:19:59,757 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 21:19:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:19:59,798 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2023-04-02 21:19:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:19:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-04-02 21:19:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:19:59,800 INFO L225 Difference]: With dead ends: 44 [2023-04-02 21:19:59,800 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 21:19:59,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-04-02 21:19:59,803 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:19:59,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 45 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:19:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 21:19:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-02 21:19:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 28 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 21:19:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-04-02 21:19:59,817 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 17 [2023-04-02 21:19:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:19:59,818 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-04-02 21:19:59,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 21:19:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-04-02 21:19:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-02 21:19:59,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:19:59,821 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:19:59,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 21:20:00,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:00,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:00,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1597911051, now seen corresponding path program 2 times [2023-04-02 21:20:00,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:00,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663282304] [2023-04-02 21:20:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 21:20:00,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663282304] [2023-04-02 21:20:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663282304] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:00,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445315931] [2023-04-02 21:20:00,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:20:00,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:00,190 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) [2023-04-02 21:20:00,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:20:00,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 21:20:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:20:00,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 21:20:00,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 21:20:00,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 21:20:00,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445315931] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:00,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916494579] [2023-04-02 21:20:00,395 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:20:00,395 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:00,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:00,396 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:00,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:00,420 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:00,511 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:00,515 INFO L197 IcfgInterpreter]: Interpreting procedure wait_for_clock with input of size 9 for LOIs [2023-04-02 21:20:00,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:00,519 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:00,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '606#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:00,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:00,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:00,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 21:20:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333472266] [2023-04-02 21:20:00,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 21:20:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 21:20:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-04-02 21:20:00,787 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 21:20:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:00,873 INFO L93 Difference]: Finished difference Result 80 states and 113 transitions. [2023-04-02 21:20:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 21:20:00,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 38 [2023-04-02 21:20:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:00,874 INFO L225 Difference]: With dead ends: 80 [2023-04-02 21:20:00,874 INFO L226 Difference]: Without dead ends: 75 [2023-04-02 21:20:00,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-04-02 21:20:00,875 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:00,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:20:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-02 21:20:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-04-02 21:20:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 58 states have internal predecessors, (59), 23 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-02 21:20:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2023-04-02 21:20:00,884 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 38 [2023-04-02 21:20:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:00,884 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2023-04-02 21:20:00,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 21:20:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2023-04-02 21:20:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 21:20:00,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:00,886 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:00,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:20:01,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 21:20:01,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:01,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash -619258891, now seen corresponding path program 3 times [2023-04-02 21:20:01,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:01,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116313183] [2023-04-02 21:20:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:01,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 21:20:01,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:01,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116313183] [2023-04-02 21:20:01,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116313183] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:01,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046500265] [2023-04-02 21:20:01,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:20:01,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:01,323 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) [2023-04-02 21:20:01,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:20:01,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:20:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:20:01,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 21:20:01,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 21:20:01,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 21:20:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046500265] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290055116] [2023-04-02 21:20:01,631 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:20:01,631 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:01,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:01,632 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:01,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:01,656 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:01,725 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:01,729 INFO L197 IcfgInterpreter]: Interpreting procedure wait_for_clock with input of size 9 for LOIs [2023-04-02 21:20:01,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:01,733 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:01,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:01,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:01,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:01,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 21:20:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122763929] [2023-04-02 21:20:01,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:01,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 21:20:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:02,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 21:20:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=922, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 21:20:02,001 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-02 21:20:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:02,183 INFO L93 Difference]: Finished difference Result 152 states and 227 transitions. [2023-04-02 21:20:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 21:20:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 80 [2023-04-02 21:20:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:02,189 INFO L225 Difference]: With dead ends: 152 [2023-04-02 21:20:02,190 INFO L226 Difference]: Without dead ends: 147 [2023-04-02 21:20:02,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=338, Invalid=922, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 21:20:02,193 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:02,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 119 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:20:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-02 21:20:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-04-02 21:20:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 118 states have internal predecessors, (119), 47 states have call successors, (47), 5 states have call predecessors, (47), 3 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-04-02 21:20:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 211 transitions. [2023-04-02 21:20:02,217 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 211 transitions. Word has length 80 [2023-04-02 21:20:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:02,218 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 211 transitions. [2023-04-02 21:20:02,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-02 21:20:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 211 transitions. [2023-04-02 21:20:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-02 21:20:02,222 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:02,222 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:02,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 21:20:02,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:02,430 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:02,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 391377909, now seen corresponding path program 4 times [2023-04-02 21:20:02,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:02,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596749702] [2023-04-02 21:20:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-04-02 21:20:02,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596749702] [2023-04-02 21:20:02,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596749702] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:02,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863179665] [2023-04-02 21:20:02,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 21:20:02,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:02,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:02,939 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) [2023-04-02 21:20:02,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 21:20:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:03,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 21:20:03,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-04-02 21:20:03,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-04-02 21:20:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863179665] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228270436] [2023-04-02 21:20:03,868 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:20:03,868 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:03,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:03,869 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:03,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:03,879 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:03,922 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:03,925 INFO L197 IcfgInterpreter]: Interpreting procedure wait_for_clock with input of size 9 for LOIs [2023-04-02 21:20:03,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:03,928 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:04,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2846#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:04,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:04,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:04,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 21:20:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827301662] [2023-04-02 21:20:04,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:04,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 21:20:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 21:20:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=2326, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 21:20:04,236 INFO L87 Difference]: Start difference. First operand 147 states and 211 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 47 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-02 21:20:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:04,528 INFO L93 Difference]: Finished difference Result 296 states and 455 transitions. [2023-04-02 21:20:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 21:20:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 47 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 164 [2023-04-02 21:20:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:04,531 INFO L225 Difference]: With dead ends: 296 [2023-04-02 21:20:04,531 INFO L226 Difference]: Without dead ends: 291 [2023-04-02 21:20:04,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1214, Invalid=2326, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 21:20:04,532 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 138 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:04,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 211 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:20:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-04-02 21:20:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2023-04-02 21:20:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 192 states have (on average 1.2447916666666667) internal successors, (239), 238 states have internal predecessors, (239), 95 states have call successors, (95), 5 states have call predecessors, (95), 3 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-04-02 21:20:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 427 transitions. [2023-04-02 21:20:04,549 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 427 transitions. Word has length 164 [2023-04-02 21:20:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:04,549 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 427 transitions. [2023-04-02 21:20:04,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 47 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-02 21:20:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 427 transitions. [2023-04-02 21:20:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-04-02 21:20:04,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:04,564 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:04,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 21:20:04,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:04,765 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:04,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:04,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1424350219, now seen corresponding path program 5 times [2023-04-02 21:20:04,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:04,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742113504] [2023-04-02 21:20:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2023-04-02 21:20:06,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742113504] [2023-04-02 21:20:06,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742113504] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674796773] [2023-04-02 21:20:06,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:20:06,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:06,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:06,215 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) [2023-04-02 21:20:06,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 21:20:06,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-04-02 21:20:06,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:20:06,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 21:20:06,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2023-04-02 21:20:06,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2023-04-02 21:20:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674796773] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641312335] [2023-04-02 21:20:08,984 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:20:08,984 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:08,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:08,985 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:08,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:09,003 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:09,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:09,060 INFO L197 IcfgInterpreter]: Interpreting procedure wait_for_clock with input of size 9 for LOIs [2023-04-02 21:20:09,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:09,062 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:09,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5826#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:09,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:09,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:09,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-02 21:20:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335422067] [2023-04-02 21:20:09,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:09,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-02 21:20:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-02 21:20:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4694, Invalid=6862, Unknown=0, NotChecked=0, Total=11556 [2023-04-02 21:20:09,459 INFO L87 Difference]: Start difference. First operand 291 states and 427 transitions. Second operand has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 97 states have internal predecessors, (382), 95 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2023-04-02 21:20:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:10,574 INFO L93 Difference]: Finished difference Result 584 states and 911 transitions. [2023-04-02 21:20:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-02 21:20:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 97 states have internal predecessors, (382), 95 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) Word has length 332 [2023-04-02 21:20:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:10,578 INFO L225 Difference]: With dead ends: 584 [2023-04-02 21:20:10,578 INFO L226 Difference]: Without dead ends: 579 [2023-04-02 21:20:10,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4694, Invalid=6862, Unknown=0, NotChecked=0, Total=11556 [2023-04-02 21:20:10,581 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 332 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:10,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 348 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 21:20:10,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-04-02 21:20:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2023-04-02 21:20:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 384 states have (on average 1.2473958333333333) internal successors, (479), 478 states have internal predecessors, (479), 191 states have call successors, (191), 5 states have call predecessors, (191), 3 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-04-02 21:20:10,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 859 transitions. [2023-04-02 21:20:10,615 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 859 transitions. Word has length 332 [2023-04-02 21:20:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:10,616 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 859 transitions. [2023-04-02 21:20:10,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9381443298969074) internal successors, (382), 97 states have internal predecessors, (382), 95 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2023-04-02 21:20:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 859 transitions. [2023-04-02 21:20:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2023-04-02 21:20:10,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:10,625 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:10,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 21:20:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:10,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:10,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1479113739, now seen corresponding path program 6 times [2023-04-02 21:20:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:10,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232157654] [2023-04-02 21:20:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:10,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:20:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30691 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 8742 trivial. 0 not checked. [2023-04-02 21:20:16,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:20:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232157654] [2023-04-02 21:20:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232157654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:20:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827220196] [2023-04-02 21:20:16,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 21:20:16,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:20:16,464 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) [2023-04-02 21:20:16,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 21:20:16,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 21:20:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:20:16,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 21:20:16,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:20:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30691 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 8742 trivial. 0 not checked. [2023-04-02 21:20:17,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:20:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30691 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 8742 trivial. 0 not checked. [2023-04-02 21:20:25,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827220196] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:20:25,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359404749] [2023-04-02 21:20:25,501 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:20:25,501 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:20:25,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:20:25,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:20:25,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:20:25,515 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:20:25,572 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:20:25,575 INFO L197 IcfgInterpreter]: Interpreting procedure wait_for_clock with input of size 9 for LOIs [2023-04-02 21:20:25,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:20:25,578 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:20:26,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11782#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:20:26,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:20:26,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:20:26,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-04-02 21:20:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689810071] [2023-04-02 21:20:26,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:20:26,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-04-02 21:20:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:20:26,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-04-02 21:20:26,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18566, Invalid=22846, Unknown=0, NotChecked=0, Total=41412 [2023-04-02 21:20:26,189 INFO L87 Difference]: Start difference. First operand 579 states and 859 transitions. Second operand has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 193 states have internal predecessors, (766), 191 states have call successors, (192), 2 states have call predecessors, (192), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-04-02 21:20:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:20:34,189 INFO L93 Difference]: Finished difference Result 1160 states and 1823 transitions. [2023-04-02 21:20:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-02 21:20:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 193 states have internal predecessors, (766), 191 states have call successors, (192), 2 states have call predecessors, (192), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) Word has length 668 [2023-04-02 21:20:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:20:34,196 INFO L225 Difference]: With dead ends: 1160 [2023-04-02 21:20:34,196 INFO L226 Difference]: Without dead ends: 1155 [2023-04-02 21:20:34,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2100 GetRequests, 1898 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3524 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=18566, Invalid=22846, Unknown=0, NotChecked=0, Total=41412 [2023-04-02 21:20:34,199 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1004 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 21:20:34,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 616 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 21:20:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2023-04-02 21:20:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1155. [2023-04-02 21:20:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 768 states have (on average 1.2486979166666667) internal successors, (959), 958 states have internal predecessors, (959), 383 states have call successors, (383), 5 states have call predecessors, (383), 3 states have return successors, (381), 381 states have call predecessors, (381), 381 states have call successors, (381) [2023-04-02 21:20:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1723 transitions. [2023-04-02 21:20:34,236 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1723 transitions. Word has length 668 [2023-04-02 21:20:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:20:34,240 INFO L495 AbstractCegarLoop]: Abstraction has 1155 states and 1723 transitions. [2023-04-02 21:20:34,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 3.9689119170984455) internal successors, (766), 193 states have internal predecessors, (766), 191 states have call successors, (192), 2 states have call predecessors, (192), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2023-04-02 21:20:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1723 transitions. [2023-04-02 21:20:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2023-04-02 21:20:34,272 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:20:34,272 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:20:34,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 21:20:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:20:34,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:20:34,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:20:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 906970101, now seen corresponding path program 7 times [2023-04-02 21:20:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:20:34,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448650571] [2023-04-02 21:20:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:20:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:20:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:21:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 125875 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 35910 trivial. 0 not checked. [2023-04-02 21:21:01,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:21:01,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448650571] [2023-04-02 21:21:01,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448650571] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:21:01,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55658660] [2023-04-02 21:21:01,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 21:21:01,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:21:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:21:01,544 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) [2023-04-02 21:21:01,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 21:21:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:21:01,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 192 conjunts are in the unsatisfiable core [2023-04-02 21:21:01,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:21:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 125875 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 35910 trivial. 0 not checked. [2023-04-02 21:21:02,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:21:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 125875 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 35910 trivial. 0 not checked. [2023-04-02 21:21:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55658660] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:21:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1481897073] [2023-04-02 21:21:34,553 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 21:21:34,553 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:21:34,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:21:34,554 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:21:34,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:21:34,564 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 21:21:34,606 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 21:21:34,611 INFO L197 IcfgInterpreter]: Interpreting procedure wait_for_clock with input of size 9 for LOIs [2023-04-02 21:21:34,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:21:34,614 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:21:35,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23690#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:21:35,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:21:35,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:21:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2023-04-02 21:21:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099584571] [2023-04-02 21:21:35,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:21:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2023-04-02 21:21:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:21:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2023-04-02 21:21:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73958, Invalid=82462, Unknown=0, NotChecked=0, Total=156420 [2023-04-02 21:21:35,701 INFO L87 Difference]: Start difference. First operand 1155 states and 1723 transitions. Second operand has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 385 states have internal predecessors, (1534), 383 states have call successors, (384), 2 states have call predecessors, (384), 1 states have return successors, (382), 382 states have call predecessors, (382), 382 states have call successors, (382) [2023-04-02 21:23:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:23:14,206 INFO L93 Difference]: Finished difference Result 2312 states and 3647 transitions. [2023-04-02 21:23:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-04-02 21:23:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 385 states have internal predecessors, (1534), 383 states have call successors, (384), 2 states have call predecessors, (384), 1 states have return successors, (382), 382 states have call predecessors, (382), 382 states have call successors, (382) Word has length 1340 [2023-04-02 21:23:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:23:14,224 INFO L225 Difference]: With dead ends: 2312 [2023-04-02 21:23:14,224 INFO L226 Difference]: Without dead ends: 2307 [2023-04-02 21:23:14,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4212 GetRequests, 3818 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7076 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=73958, Invalid=82462, Unknown=0, NotChecked=0, Total=156420 [2023-04-02 21:23:14,231 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1838 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 1452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2222 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1452 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 21:23:14,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2222 Valid, 1252 Invalid, 3013 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1452 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 21:23:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2023-04-02 21:23:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2023-04-02 21:23:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 1536 states have (on average 1.2493489583333333) internal successors, (1919), 1918 states have internal predecessors, (1919), 767 states have call successors, (767), 5 states have call predecessors, (767), 3 states have return successors, (765), 765 states have call predecessors, (765), 765 states have call successors, (765) [2023-04-02 21:23:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3451 transitions. [2023-04-02 21:23:14,295 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3451 transitions. Word has length 1340 [2023-04-02 21:23:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:23:14,296 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 3451 transitions. [2023-04-02 21:23:14,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 3.9844155844155846) internal successors, (1534), 385 states have internal predecessors, (1534), 383 states have call successors, (384), 2 states have call predecessors, (384), 1 states have return successors, (382), 382 states have call predecessors, (382), 382 states have call successors, (382) [2023-04-02 21:23:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3451 transitions. [2023-04-02 21:23:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2685 [2023-04-02 21:23:14,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:23:14,362 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:23:14,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 21:23:14,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:23:14,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:23:14,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:23:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1518287883, now seen corresponding path program 8 times [2023-04-02 21:23:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:23:14,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234946505] [2023-04-02 21:23:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:23:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:23:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat