/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-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:54:01,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:54:01,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:54:01,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:54:01,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:54:01,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:54:01,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:54:01,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:54:01,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:54:01,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:54:01,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:54:01,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:54:01,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:54:01,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:54:01,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:54:01,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:54:01,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:54:01,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:54:01,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:54:01,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:54:01,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:54:01,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:54:01,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:54:01,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:54:01,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:54:01,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:54:01,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:54:01,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:54:01,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:54:01,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:54:01,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:54:01,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:54:01,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:54:01,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:54:01,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:54:01,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:54:01,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:54:01,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:54:01,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:54:01,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:54:01,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:54:01,449 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 02:54:01,471 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:54:01,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:54:01,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:54:01,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:54:01,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:54:01,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:54:01,473 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:54:01,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:54:01,473 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:54:01,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:54:01,474 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:54:01,474 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:54:01,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:54:01,474 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:54:01,474 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:54:01,474 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:54:01,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:54:01,474 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:54:01,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:54:01,475 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:54:01,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:54:01,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:54:01,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:54:01,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:54:01,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:54:01,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:54:01,476 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:54:01,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:54:01,476 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:54:01,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:54:01,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:54:01,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:54:01,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:54:01,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:54:01,477 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:54:01,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:54:01,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:54:01,477 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:54:01,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:54:01,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:54:01,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:54:01,477 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:54:01,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:54:01,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:54:01,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:54:01,688 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:54:01,689 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:54:01,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:54:02,666 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:54:02,819 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:54:02,819 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:54:02,830 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97dc1770/8febcaaef89c4c4f83ecbbb5828c9e74/FLAG6cefae92c [2023-04-03 02:54:02,845 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97dc1770/8febcaaef89c4c4f83ecbbb5828c9e74 [2023-04-03 02:54:02,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:54:02,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:54:02,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:54:02,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:54:02,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:54:02,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:54:02" (1/1) ... [2023-04-03 02:54:02,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199e9943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:02, skipping insertion in model container [2023-04-03 02:54:02,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:54:02" (1/1) ... [2023-04-03 02:54:02,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:54:02,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:54:03,068 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-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2023-04-03 02:54:03,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:54:03,112 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:54:03,141 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-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2023-04-03 02:54:03,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:54:03,170 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:54:03,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03 WrapperNode [2023-04-03 02:54:03,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:54:03,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:54:03,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:54:03,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:54:03,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,258 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:54:03,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:54:03,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:54:03,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:54:03,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (1/1) ... [2023-04-03 02:54:03,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:54:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:54:03,313 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 02:54:03,315 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 02:54:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:54:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:54:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:54:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:54:03,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:54:03,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:54:03,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:54:03,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:54:03,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:54:03,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 02:54:03,354 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:54:03,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:54:03,459 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:54:03,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:54:03,962 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:54:04,038 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:54:04,038 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:54:04,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:54:04 BoogieIcfgContainer [2023-04-03 02:54:04,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:54:04,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:54:04,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:54:04,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:54:04,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:54:02" (1/3) ... [2023-04-03 02:54:04,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44194cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:54:04, skipping insertion in model container [2023-04-03 02:54:04,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:54:03" (2/3) ... [2023-04-03 02:54:04,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44194cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:54:04, skipping insertion in model container [2023-04-03 02:54:04,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:54:04" (3/3) ... [2023-04-03 02:54:04,046 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:54:04,057 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:54:04,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:54:04,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:54:04,096 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;@550c3215, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:54:04,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:54:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 127 states have (on average 1.6771653543307086) internal successors, (213), 128 states have internal predecessors, (213), 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 02:54:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:54:04,111 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:04,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:04,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:04,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1075039699, now seen corresponding path program 1 times [2023-04-03 02:54:04,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:04,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642573508] [2023-04-03 02:54:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:04,495 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 02:54:04,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:04,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642573508] [2023-04-03 02:54:04,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642573508] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:04,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:04,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:54:04,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247610744] [2023-04-03 02:54:04,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:04,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:54:04,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:54:04,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:54:04,540 INFO L87 Difference]: Start difference. First operand has 133 states, 127 states have (on average 1.6771653543307086) internal successors, (213), 128 states have internal predecessors, (213), 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 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 02:54:04,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:04,657 INFO L93 Difference]: Finished difference Result 294 states and 456 transitions. [2023-04-03 02:54:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:54:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 62 [2023-04-03 02:54:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:04,669 INFO L225 Difference]: With dead ends: 294 [2023-04-03 02:54:04,670 INFO L226 Difference]: Without dead ends: 200 [2023-04-03 02:54:04,672 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 02:54:04,676 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 162 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:04,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 421 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-04-03 02:54:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2023-04-03 02:54:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.407216494845361) internal successors, (273), 194 states have internal predecessors, (273), 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 02:54:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 276 transitions. [2023-04-03 02:54:04,730 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 276 transitions. Word has length 62 [2023-04-03 02:54:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:04,731 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 276 transitions. [2023-04-03 02:54:04,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 02:54:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 276 transitions. [2023-04-03 02:54:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:54:04,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:04,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:04,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:54:04,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:04,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash 631585047, now seen corresponding path program 1 times [2023-04-03 02:54:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:04,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486698790] [2023-04-03 02:54:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:04,921 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 02:54:04,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:04,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486698790] [2023-04-03 02:54:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486698790] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:04,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:04,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:54:04,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179427889] [2023-04-03 02:54:04,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:04,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:54:04,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:54:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:54:04,925 INFO L87 Difference]: Start difference. First operand 198 states and 276 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:54:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:04,998 INFO L93 Difference]: Finished difference Result 478 states and 700 transitions. [2023-04-03 02:54:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:54:05,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 65 [2023-04-03 02:54:05,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:05,006 INFO L225 Difference]: With dead ends: 478 [2023-04-03 02:54:05,006 INFO L226 Difference]: Without dead ends: 327 [2023-04-03 02:54:05,009 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 02:54:05,009 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 118 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:05,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 350 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-04-03 02:54:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2023-04-03 02:54:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 321 states have (on average 1.4485981308411215) internal successors, (465), 321 states have internal predecessors, (465), 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 02:54:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 468 transitions. [2023-04-03 02:54:05,040 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 468 transitions. Word has length 65 [2023-04-03 02:54:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:05,040 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 468 transitions. [2023-04-03 02:54:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:54:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 468 transitions. [2023-04-03 02:54:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-03 02:54:05,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:05,043 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, 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 02:54:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:54:05,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:05,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1552692013, now seen corresponding path program 1 times [2023-04-03 02:54:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:05,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843914473] [2023-04-03 02:54:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:05,126 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 02:54:05,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:05,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843914473] [2023-04-03 02:54:05,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843914473] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:05,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:05,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:54:05,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136590946] [2023-04-03 02:54:05,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:54:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:54:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:54:05,130 INFO L87 Difference]: Start difference. First operand 325 states and 468 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 02:54:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:05,195 INFO L93 Difference]: Finished difference Result 837 states and 1242 transitions. [2023-04-03 02:54:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:54:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 68 [2023-04-03 02:54:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:05,199 INFO L225 Difference]: With dead ends: 837 [2023-04-03 02:54:05,199 INFO L226 Difference]: Without dead ends: 559 [2023-04-03 02:54:05,204 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 02:54:05,206 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 113 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:05,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 335 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-04-03 02:54:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 557. [2023-04-03 02:54:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 553 states have (on average 1.4701627486437614) internal successors, (813), 553 states have internal predecessors, (813), 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 02:54:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 816 transitions. [2023-04-03 02:54:05,275 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 816 transitions. Word has length 68 [2023-04-03 02:54:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:05,275 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 816 transitions. [2023-04-03 02:54:05,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 02:54:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 816 transitions. [2023-04-03 02:54:05,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:54:05,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:05,277 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, 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 02:54:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:54:05,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:05,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:05,284 INFO L85 PathProgramCache]: Analyzing trace with hash 696397227, now seen corresponding path program 1 times [2023-04-03 02:54:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:05,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536062721] [2023-04-03 02:54:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:05,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:05,371 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 02:54:05,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536062721] [2023-04-03 02:54:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536062721] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:05,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:05,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:54:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856117097] [2023-04-03 02:54:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:05,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:54:05,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:54:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:54:05,373 INFO L87 Difference]: Start difference. First operand 557 states and 816 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 02:54:05,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:05,491 INFO L93 Difference]: Finished difference Result 1489 states and 2218 transitions. [2023-04-03 02:54:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:54:05,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 71 [2023-04-03 02:54:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:05,496 INFO L225 Difference]: With dead ends: 1489 [2023-04-03 02:54:05,496 INFO L226 Difference]: Without dead ends: 979 [2023-04-03 02:54:05,497 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 02:54:05,501 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 108 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:05,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 320 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-04-03 02:54:05,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 977. [2023-04-03 02:54:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 973 states have (on average 1.4768756423432683) internal successors, (1437), 973 states have internal predecessors, (1437), 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 02:54:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1440 transitions. [2023-04-03 02:54:05,630 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1440 transitions. Word has length 71 [2023-04-03 02:54:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:05,630 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1440 transitions. [2023-04-03 02:54:05,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 02:54:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1440 transitions. [2023-04-03 02:54:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:54:05,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:05,631 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, 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 02:54:05,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:54:05,631 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:05,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1298359562, now seen corresponding path program 1 times [2023-04-03 02:54:05,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:05,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035365549] [2023-04-03 02:54:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:05,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:05,700 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 02:54:05,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:05,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035365549] [2023-04-03 02:54:05,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035365549] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:05,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:05,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:54:05,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573173803] [2023-04-03 02:54:05,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:05,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:54:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:54:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:54:05,706 INFO L87 Difference]: Start difference. First operand 977 states and 1440 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 02:54:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:05,900 INFO L93 Difference]: Finished difference Result 2661 states and 3954 transitions. [2023-04-03 02:54:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:54:05,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 74 [2023-04-03 02:54:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:05,906 INFO L225 Difference]: With dead ends: 2661 [2023-04-03 02:54:05,906 INFO L226 Difference]: Without dead ends: 1731 [2023-04-03 02:54:05,908 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 02:54:05,909 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 103 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:05,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 305 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2023-04-03 02:54:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1729. [2023-04-03 02:54:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1725 states have (on average 1.4730434782608695) internal successors, (2541), 1725 states have internal predecessors, (2541), 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 02:54:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2544 transitions. [2023-04-03 02:54:06,076 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2544 transitions. Word has length 74 [2023-04-03 02:54:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:06,077 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2544 transitions. [2023-04-03 02:54:06,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 02:54:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2544 transitions. [2023-04-03 02:54:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:54:06,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:06,078 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, 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 02:54:06,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:54:06,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:06,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash -383004352, now seen corresponding path program 1 times [2023-04-03 02:54:06,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:06,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078845219] [2023-04-03 02:54:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:06,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:06,197 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 02:54:06,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:06,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078845219] [2023-04-03 02:54:06,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078845219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:06,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:06,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:54:06,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859873103] [2023-04-03 02:54:06,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:54:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:54:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:54:06,198 INFO L87 Difference]: Start difference. First operand 1729 states and 2544 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 02:54:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:06,511 INFO L93 Difference]: Finished difference Result 4741 states and 6994 transitions. [2023-04-03 02:54:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:54:06,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 77 [2023-04-03 02:54:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:06,519 INFO L225 Difference]: With dead ends: 4741 [2023-04-03 02:54:06,519 INFO L226 Difference]: Without dead ends: 3059 [2023-04-03 02:54:06,521 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 02:54:06,522 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 98 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:06,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 290 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:54:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2023-04-03 02:54:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 3057. [2023-04-03 02:54:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3053 states have (on average 1.4611857189649524) internal successors, (4461), 3053 states have internal predecessors, (4461), 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 02:54:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 4464 transitions. [2023-04-03 02:54:06,771 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 4464 transitions. Word has length 77 [2023-04-03 02:54:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:06,772 INFO L495 AbstractCegarLoop]: Abstraction has 3057 states and 4464 transitions. [2023-04-03 02:54:06,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 02:54:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 4464 transitions. [2023-04-03 02:54:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:54:06,776 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:06,776 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, 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 02:54:06,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:54:06,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:06,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1330748041, now seen corresponding path program 1 times [2023-04-03 02:54:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:06,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422198460] [2023-04-03 02:54:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:06,987 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 02:54:06,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:06,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422198460] [2023-04-03 02:54:06,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422198460] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:06,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:06,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 02:54:06,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772207227] [2023-04-03 02:54:06,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:06,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 02:54:06,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:06,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 02:54:06,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:54:06,989 INFO L87 Difference]: Start difference. First operand 3057 states and 4464 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 02:54:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:09,096 INFO L93 Difference]: Finished difference Result 18237 states and 26550 transitions. [2023-04-03 02:54:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:54:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 80 [2023-04-03 02:54:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:09,145 INFO L225 Difference]: With dead ends: 18237 [2023-04-03 02:54:09,146 INFO L226 Difference]: Without dead ends: 15227 [2023-04-03 02:54:09,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:54:09,154 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 656 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:09,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1113 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:54:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15227 states. [2023-04-03 02:54:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15227 to 15217. [2023-04-03 02:54:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15217 states, 15213 states have (on average 1.4522447906395846) internal successors, (22093), 15213 states have internal predecessors, (22093), 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 02:54:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15217 states to 15217 states and 22096 transitions. [2023-04-03 02:54:11,053 INFO L78 Accepts]: Start accepts. Automaton has 15217 states and 22096 transitions. Word has length 80 [2023-04-03 02:54:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:11,054 INFO L495 AbstractCegarLoop]: Abstraction has 15217 states and 22096 transitions. [2023-04-03 02:54:11,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 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 02:54:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 15217 states and 22096 transitions. [2023-04-03 02:54:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 02:54:11,055 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:11,055 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, 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 02:54:11,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:54:11,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:11,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2083917102, now seen corresponding path program 1 times [2023-04-03 02:54:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:11,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273007906] [2023-04-03 02:54:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:11,183 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 02:54:11,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273007906] [2023-04-03 02:54:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273007906] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:11,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:11,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:54:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93864721] [2023-04-03 02:54:11,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:11,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:54:11,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:54:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:54:11,185 INFO L87 Difference]: Start difference. First operand 15217 states and 22096 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 02:54:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:14,375 INFO L93 Difference]: Finished difference Result 38951 states and 56772 transitions. [2023-04-03 02:54:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:54:14,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 82 [2023-04-03 02:54:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:14,441 INFO L225 Difference]: With dead ends: 38951 [2023-04-03 02:54:14,441 INFO L226 Difference]: Without dead ends: 23781 [2023-04-03 02:54:14,468 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 02:54:14,468 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 678 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:14,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 170 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:54:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23781 states. [2023-04-03 02:54:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23781 to 23779. [2023-04-03 02:54:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23775 states have (on average 1.445509989484753) internal successors, (34367), 23775 states have internal predecessors, (34367), 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 02:54:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 34370 transitions. [2023-04-03 02:54:17,365 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 34370 transitions. Word has length 82 [2023-04-03 02:54:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:17,365 INFO L495 AbstractCegarLoop]: Abstraction has 23779 states and 34370 transitions. [2023-04-03 02:54:17,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 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 02:54:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 34370 transitions. [2023-04-03 02:54:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-03 02:54:17,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:17,367 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, 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 02:54:17,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:54:17,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:17,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:17,367 INFO L85 PathProgramCache]: Analyzing trace with hash -233803145, now seen corresponding path program 1 times [2023-04-03 02:54:17,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:17,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396454084] [2023-04-03 02:54:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:17,756 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 02:54:17,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396454084] [2023-04-03 02:54:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396454084] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:54:17,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:54:17,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:54:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898688652] [2023-04-03 02:54:17,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:54:17,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:54:17,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:54:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:54:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:54:17,758 INFO L87 Difference]: Start difference. First operand 23779 states and 34370 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 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 02:54:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:54:23,559 INFO L93 Difference]: Finished difference Result 44768 states and 64941 transitions. [2023-04-03 02:54:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:54:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 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 82 [2023-04-03 02:54:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:54:23,635 INFO L225 Difference]: With dead ends: 44768 [2023-04-03 02:54:23,635 INFO L226 Difference]: Without dead ends: 44766 [2023-04-03 02:54:23,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:54:23,648 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 1919 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:54:23,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1919 Valid, 3208 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:54:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44766 states. [2023-04-03 02:54:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44766 to 24339. [2023-04-03 02:54:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24339 states, 24335 states have (on average 1.4459420587630984) internal successors, (35187), 24335 states have internal predecessors, (35187), 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 02:54:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24339 states to 24339 states and 35190 transitions. [2023-04-03 02:54:27,087 INFO L78 Accepts]: Start accepts. Automaton has 24339 states and 35190 transitions. Word has length 82 [2023-04-03 02:54:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:54:27,087 INFO L495 AbstractCegarLoop]: Abstraction has 24339 states and 35190 transitions. [2023-04-03 02:54:27,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 11 states have internal predecessors, (79), 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 02:54:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 24339 states and 35190 transitions. [2023-04-03 02:54:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 02:54:27,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:54:27,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:54:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:54:27,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:54:27,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:54:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1887564376, now seen corresponding path program 1 times [2023-04-03 02:54:27,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:54:27,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108575187] [2023-04-03 02:54:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:27,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:54:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:28,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:54:28,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108575187] [2023-04-03 02:54:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108575187] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:54:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399901543] [2023-04-03 02:54:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:54:28,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:54:28,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:54:28,498 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 02:54:28,517 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 02:54:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:54:28,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 76 conjunts are in the unsatisfiable core [2023-04-03 02:54:28,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:54:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:54:31,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:55:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:55:45,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399901543] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:55:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691409832] [2023-04-03 02:55:45,567 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2023-04-03 02:55:45,567 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:55:45,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:55:45,574 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:55:45,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:55:46,316 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2023-04-03 02:55:55,006 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-03 02:56:03,706 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 131072 conjuctions. This might take some time...