/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/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:58:04,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:58:04,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:58:04,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:58:04,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:58:04,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:58:04,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:58:04,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:58:04,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:58:04,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:58:04,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:58:04,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:58:04,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:58:04,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:58:04,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:58:04,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:58:04,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:58:04,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:58:04,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:58:04,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:58:04,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:58:04,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:58:04,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:58:04,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:58:04,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:58:04,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:58:04,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:58:04,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:58:04,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:58:04,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:58:04,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:58:04,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:58:04,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:58:04,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:58:04,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:58:04,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:58:04,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:58:04,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:58:04,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:58:04,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:58:04,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:58:04,345 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 [2023-04-03 02:58:04,367 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:58:04,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:58:04,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:58:04,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:58:04,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:58:04,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:58:04,369 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:58:04,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:58:04,369 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:58:04,369 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:58:04,369 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:58:04,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:58:04,370 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:58:04,370 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:58:04,370 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:58:04,370 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:58:04,370 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:58:04,370 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:58:04,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:58:04,371 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:58:04,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:58:04,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:58:04,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:58:04,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:58:04,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:58:04,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:58:04,372 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:58:04,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:58:04,372 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:58:04,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:58:04,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:58:04,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:58:04,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:58:04,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:58:04,373 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:58:04,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:58:04,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:58:04,374 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:58:04,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:58:04,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:58:04,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:58:04,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:58:04,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:58:04,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:58:04,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:58:04,582 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:58:04,583 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:58:04,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:58:05,618 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:58:05,764 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:58:05,765 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:58:05,769 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90c86f0cb/9d26e30e447c45a1a2ab07e77420ee1c/FLAG1a141846d [2023-04-03 02:58:06,188 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90c86f0cb/9d26e30e447c45a1a2ab07e77420ee1c [2023-04-03 02:58:06,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:58:06,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:58:06,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:58:06,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:58:06,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:58:06,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f3782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06, skipping insertion in model container [2023-04-03 02:58:06,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:58:06,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:58:06,379 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/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4105,4118] [2023-04-03 02:58:06,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:58:06,413 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:58:06,449 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/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4105,4118] [2023-04-03 02:58:06,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:58:06,466 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:58:06,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06 WrapperNode [2023-04-03 02:58:06,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:58:06,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:58:06,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:58:06,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:58:06,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,502 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:58:06,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:58:06,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:58:06,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:58:06,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (1/1) ... [2023-04-03 02:58:06,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:58:06,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:58:06,570 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) [2023-04-03 02:58:06,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:58:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:58:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:58:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:58:06,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:58:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:58:06,671 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:58:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:58:06,784 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:58:06,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:58:07,051 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:58:07,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:58:07,107 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:58:07,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:58:07 BoogieIcfgContainer [2023-04-03 02:58:07,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:58:07,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:58:07,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:58:07,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:58:07,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:58:06" (1/3) ... [2023-04-03 02:58:07,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24144e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:58:07, skipping insertion in model container [2023-04-03 02:58:07,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:58:06" (2/3) ... [2023-04-03 02:58:07,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24144e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:58:07, skipping insertion in model container [2023-04-03 02:58:07,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:58:07" (3/3) ... [2023-04-03 02:58:07,114 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:58:07,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:58:07,125 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:58:07,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:58:07,167 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;@1135a802, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:58:07,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:58:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 49 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:58:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-03 02:58:07,176 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:07,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:07,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:07,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:07,183 INFO L85 PathProgramCache]: Analyzing trace with hash 969623482, now seen corresponding path program 1 times [2023-04-03 02:58:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:07,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10033643] [2023-04-03 02:58:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:07,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:07,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:07,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10033643] [2023-04-03 02:58:07,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10033643] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:07,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:07,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:58:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094715822] [2023-04-03 02:58:07,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:07,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:58:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:58:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:58:07,547 INFO L87 Difference]: Start difference. First operand has 54 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 49 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:07,612 INFO L93 Difference]: Finished difference Result 114 states and 165 transitions. [2023-04-03 02:58:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:58:07,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-03 02:58:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:07,620 INFO L225 Difference]: With dead ends: 114 [2023-04-03 02:58:07,620 INFO L226 Difference]: Without dead ends: 72 [2023-04-03 02:58:07,622 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 [2023-04-03 02:58:07,624 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 54 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:07,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 148 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-03 02:58:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-04-03 02:58:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2023-04-03 02:58:07,659 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 33 [2023-04-03 02:58:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:07,660 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2023-04-03 02:58:07,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2023-04-03 02:58:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 02:58:07,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:07,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:07,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:58:07,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:07,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1174706885, now seen corresponding path program 1 times [2023-04-03 02:58:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:07,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316263475] [2023-04-03 02:58:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:07,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:07,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:07,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316263475] [2023-04-03 02:58:07,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316263475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:07,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:07,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:58:07,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338867261] [2023-04-03 02:58:07,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:07,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:58:07,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:07,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:58:07,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:58:07,754 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:07,791 INFO L93 Difference]: Finished difference Result 158 states and 220 transitions. [2023-04-03 02:58:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:58:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-04-03 02:58:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:07,798 INFO L225 Difference]: With dead ends: 158 [2023-04-03 02:58:07,800 INFO L226 Difference]: Without dead ends: 110 [2023-04-03 02:58:07,801 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 [2023-04-03 02:58:07,802 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 33 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:07,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-03 02:58:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2023-04-03 02:58:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2023-04-03 02:58:07,833 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 36 [2023-04-03 02:58:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:07,833 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2023-04-03 02:58:07,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:07,834 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2023-04-03 02:58:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 02:58:07,834 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:07,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:07,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:58:07,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:07,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1942664208, now seen corresponding path program 1 times [2023-04-03 02:58:07,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:07,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366737925] [2023-04-03 02:58:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:07,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:07,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:07,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366737925] [2023-04-03 02:58:07,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366737925] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:07,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:07,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:58:07,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618587829] [2023-04-03 02:58:07,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:07,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:58:07,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:58:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:58:07,896 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:07,960 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-04-03 02:58:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:58:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-04-03 02:58:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:07,964 INFO L225 Difference]: With dead ends: 264 [2023-04-03 02:58:07,964 INFO L226 Difference]: Without dead ends: 178 [2023-04-03 02:58:07,968 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 [2023-04-03 02:58:07,970 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:07,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 110 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-03 02:58:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2023-04-03 02:58:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.3953488372093024) internal successors, (240), 172 states have internal predecessors, (240), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 243 transitions. [2023-04-03 02:58:08,003 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 243 transitions. Word has length 39 [2023-04-03 02:58:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:08,004 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 243 transitions. [2023-04-03 02:58:08,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 243 transitions. [2023-04-03 02:58:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:58:08,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:08,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:08,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:58:08,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:08,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1663555133, now seen corresponding path program 1 times [2023-04-03 02:58:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703402900] [2023-04-03 02:58:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:08,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703402900] [2023-04-03 02:58:08,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703402900] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:08,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:08,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:58:08,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493883661] [2023-04-03 02:58:08,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:08,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:58:08,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:58:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:58:08,118 INFO L87 Difference]: Start difference. First operand 176 states and 243 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:08,267 INFO L93 Difference]: Finished difference Result 668 states and 942 transitions. [2023-04-03 02:58:08,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:58:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-03 02:58:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:08,269 INFO L225 Difference]: With dead ends: 668 [2023-04-03 02:58:08,269 INFO L226 Difference]: Without dead ends: 514 [2023-04-03 02:58:08,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:58:08,279 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 203 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:08,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 360 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:58:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-04-03 02:58:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 260. [2023-04-03 02:58:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.38671875) internal successors, (355), 256 states have internal predecessors, (355), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 358 transitions. [2023-04-03 02:58:08,323 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 358 transitions. Word has length 42 [2023-04-03 02:58:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:08,324 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 358 transitions. [2023-04-03 02:58:08,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 358 transitions. [2023-04-03 02:58:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-03 02:58:08,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:08,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:08,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:58:08,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:08,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash 55455000, now seen corresponding path program 1 times [2023-04-03 02:58:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:08,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049207864] [2023-04-03 02:58:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:08,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:08,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:08,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049207864] [2023-04-03 02:58:08,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049207864] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:08,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:08,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:58:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776745065] [2023-04-03 02:58:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:08,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:58:08,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:58:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:58:08,395 INFO L87 Difference]: Start difference. First operand 260 states and 358 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:08,450 INFO L93 Difference]: Finished difference Result 646 states and 908 transitions. [2023-04-03 02:58:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:58:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-04-03 02:58:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:08,454 INFO L225 Difference]: With dead ends: 646 [2023-04-03 02:58:08,454 INFO L226 Difference]: Without dead ends: 408 [2023-04-03 02:58:08,456 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 [2023-04-03 02:58:08,456 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:08,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:08,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-03 02:58:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-03 02:58:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.400497512437811) internal successors, (563), 402 states have internal predecessors, (563), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 566 transitions. [2023-04-03 02:58:08,506 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 566 transitions. Word has length 44 [2023-04-03 02:58:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:08,506 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 566 transitions. [2023-04-03 02:58:08,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 566 transitions. [2023-04-03 02:58:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-03 02:58:08,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:08,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:08,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:58:08,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:08,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 75504343, now seen corresponding path program 1 times [2023-04-03 02:58:08,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:08,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639265827] [2023-04-03 02:58:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:08,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:08,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:08,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639265827] [2023-04-03 02:58:08,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639265827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:08,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:08,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:58:08,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155618543] [2023-04-03 02:58:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:08,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:58:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:58:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:58:08,661 INFO L87 Difference]: Start difference. First operand 406 states and 566 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:08,750 INFO L93 Difference]: Finished difference Result 790 states and 1109 transitions. [2023-04-03 02:58:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:58:08,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-04-03 02:58:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:08,755 INFO L225 Difference]: With dead ends: 790 [2023-04-03 02:58:08,755 INFO L226 Difference]: Without dead ends: 408 [2023-04-03 02:58:08,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:58:08,756 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 22 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:08,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-04-03 02:58:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2023-04-03 02:58:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.3955223880597014) internal successors, (561), 402 states have internal predecessors, (561), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 564 transitions. [2023-04-03 02:58:08,794 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 564 transitions. Word has length 44 [2023-04-03 02:58:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:08,795 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 564 transitions. [2023-04-03 02:58:08,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 564 transitions. [2023-04-03 02:58:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:58:08,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:08,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:58:08,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:08,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1956242078, now seen corresponding path program 1 times [2023-04-03 02:58:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:08,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375420121] [2023-04-03 02:58:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:08,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:08,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375420121] [2023-04-03 02:58:08,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375420121] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:08,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:08,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:58:08,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743114938] [2023-04-03 02:58:08,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:08,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:58:08,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:58:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:58:08,881 INFO L87 Difference]: Start difference. First operand 406 states and 564 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:08,960 INFO L93 Difference]: Finished difference Result 788 states and 1104 transitions. [2023-04-03 02:58:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:58:08,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-03 02:58:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:08,961 INFO L225 Difference]: With dead ends: 788 [2023-04-03 02:58:08,961 INFO L226 Difference]: Without dead ends: 406 [2023-04-03 02:58:08,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:58:08,962 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 115 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:08,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-04-03 02:58:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2023-04-03 02:58:09,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.3756218905472637) internal successors, (553), 402 states have internal predecessors, (553), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 556 transitions. [2023-04-03 02:58:09,007 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 556 transitions. Word has length 45 [2023-04-03 02:58:09,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:09,007 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 556 transitions. [2023-04-03 02:58:09,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 556 transitions. [2023-04-03 02:58:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:58:09,007 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:09,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:09,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:58:09,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:09,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1809434717, now seen corresponding path program 1 times [2023-04-03 02:58:09,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:09,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608233175] [2023-04-03 02:58:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:09,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:09,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608233175] [2023-04-03 02:58:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608233175] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:09,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:58:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651534981] [2023-04-03 02:58:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:58:09,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:58:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:58:09,059 INFO L87 Difference]: Start difference. First operand 406 states and 556 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:09,167 INFO L93 Difference]: Finished difference Result 788 states and 1088 transitions. [2023-04-03 02:58:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:58:09,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-03 02:58:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:09,169 INFO L225 Difference]: With dead ends: 788 [2023-04-03 02:58:09,169 INFO L226 Difference]: Without dead ends: 406 [2023-04-03 02:58:09,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:58:09,171 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 138 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:09,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:09,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-04-03 02:58:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2023-04-03 02:58:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 402 states have (on average 1.335820895522388) internal successors, (537), 402 states have internal predecessors, (537), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 540 transitions. [2023-04-03 02:58:09,225 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 540 transitions. Word has length 45 [2023-04-03 02:58:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:09,226 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 540 transitions. [2023-04-03 02:58:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 540 transitions. [2023-04-03 02:58:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:58:09,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:09,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:09,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:58:09,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:09,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1937520024, now seen corresponding path program 1 times [2023-04-03 02:58:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626524946] [2023-04-03 02:58:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:09,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:09,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626524946] [2023-04-03 02:58:09,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626524946] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:58:09,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:58:09,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:58:09,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030994313] [2023-04-03 02:58:09,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:58:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:58:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:58:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:58:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:58:09,363 INFO L87 Difference]: Start difference. First operand 406 states and 540 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:58:09,479 INFO L93 Difference]: Finished difference Result 643 states and 848 transitions. [2023-04-03 02:58:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:58:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-03 02:58:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:58:09,481 INFO L225 Difference]: With dead ends: 643 [2023-04-03 02:58:09,481 INFO L226 Difference]: Without dead ends: 641 [2023-04-03 02:58:09,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:58:09,483 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 61 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:58:09,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 261 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:58:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2023-04-03 02:58:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 422. [2023-04-03 02:58:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 418 states have (on average 1.2942583732057416) internal successors, (541), 418 states have internal predecessors, (541), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 544 transitions. [2023-04-03 02:58:09,563 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 544 transitions. Word has length 45 [2023-04-03 02:58:09,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:58:09,564 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 544 transitions. [2023-04-03 02:58:09,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:58:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 544 transitions. [2023-04-03 02:58:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:58:09,565 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:58:09,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:58:09,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:58:09,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:58:09,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:58:09,565 INFO L85 PathProgramCache]: Analyzing trace with hash 237357238, now seen corresponding path program 1 times [2023-04-03 02:58:09,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:58:09,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599320787] [2023-04-03 02:58:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:09,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:58:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:12,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:58:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599320787] [2023-04-03 02:58:12,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599320787] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:58:12,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293021778] [2023-04-03 02:58:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:58:12,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:58:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:58:12,281 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) [2023-04-03 02:58:12,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:58:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:58:12,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-03 02:58:12,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:58:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:15,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:58:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:58:52,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293021778] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:58:52,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589645813] [2023-04-03 02:58:52,894 INFO L159 IcfgInterpreter]: Started Sifa with 46 locations of interest [2023-04-03 02:58:52,894 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:58:52,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:58:52,922 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:58:52,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:58:53,200 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-03 02:59:00,505 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 02:59:01,042 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 20736 conjuctions. This might take some time...