/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:44:39,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:44:39,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:44:39,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:44:39,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:44:39,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:44:39,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:44:39,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:44:39,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:44:39,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:44:39,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:44:39,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:44:39,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:44:39,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:44:39,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:44:39,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:44:39,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:44:39,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:44:39,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:44:39,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:44:39,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:44:39,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:44:39,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:44:39,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:44:39,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:44:39,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:44:39,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:44:39,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:44:39,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:44:39,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:44:39,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:44:39,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:44:39,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:44:39,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:44:39,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:44:39,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:44:39,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:44:39,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:44:39,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:44:39,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:44:39,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:44:39,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:44:39,431 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:44:39,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:44:39,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:44:39,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:44:39,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:44:39,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:44:39,433 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:44:39,433 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:44:39,433 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:44:39,433 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:44:39,434 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:44:39,434 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:44:39,434 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:44:39,434 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:44:39,434 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:44:39,434 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:44:39,435 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:44:39,435 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:44:39,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:44:39,435 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:44:39,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:44:39,437 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:44:39,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:44:39,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:44:39,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:44:39,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:44:39,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:44:39,437 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:44:39,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:44:39,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:44:39,438 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:44:39,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:44:39,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:44:39,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:44:39,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:44:39,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:44:39,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:44:39,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:44:39,689 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:44:39,690 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:44:39,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:44:40,844 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:44:41,035 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:44:41,036 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:44:41,043 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b885d1e/7bd8830ed2964d8ea5858abf341233be/FLAG19f5fae09 [2023-04-01 12:44:41,060 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b885d1e/7bd8830ed2964d8ea5858abf341233be [2023-04-01 12:44:41,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:44:41,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:44:41,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:44:41,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:44:41,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:44:41,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3330a840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41, skipping insertion in model container [2023-04-01 12:44:41,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:44:41,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:44:41,264 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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4938,4951] [2023-04-01 12:44:41,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:44:41,298 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:44:41,325 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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4938,4951] [2023-04-01 12:44:41,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:44:41,352 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:44:41,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41 WrapperNode [2023-04-01 12:44:41,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:44:41,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:44:41,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:44:41,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:44:41,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,401 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:44:41,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:44:41,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:44:41,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:44:41,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (1/1) ... [2023-04-01 12:44:41,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:44:41,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:44:41,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:44:41,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:44:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:44:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:44:41,473 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:44:41,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:44:41,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:44:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:44:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:44:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:44:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:44:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:44:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:44:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:44:41,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:44:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:44:41,586 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:44:41,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:44:41,962 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:44:42,061 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:44:42,061 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:44:42,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:44:42 BoogieIcfgContainer [2023-04-01 12:44:42,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:44:42,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:44:42,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:44:42,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:44:42,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:44:41" (1/3) ... [2023-04-01 12:44:42,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ecb463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:44:42, skipping insertion in model container [2023-04-01 12:44:42,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:44:41" (2/3) ... [2023-04-01 12:44:42,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ecb463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:44:42, skipping insertion in model container [2023-04-01 12:44:42,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:44:42" (3/3) ... [2023-04-01 12:44:42,071 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:44:42,087 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:44:42,088 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:44:42,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:44:42,151 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;@4c3f5f1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:44:42,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:44:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 60 states have (on average 1.7) internal successors, (102), 62 states have internal predecessors, (102), 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) [2023-04-01 12:44:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 12:44:42,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:42,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:44:42,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:42,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash -796274295, now seen corresponding path program 1 times [2023-04-01 12:44:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:42,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536537947] [2023-04-01 12:44:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:42,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:42,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:42,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536537947] [2023-04-01 12:44:42,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536537947] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:42,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:42,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146889228] [2023-04-01 12:44:42,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:42,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:42,655 INFO L87 Difference]: Start difference. First operand has 67 states, 60 states have (on average 1.7) internal successors, (102), 62 states have internal predecessors, (102), 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 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:44:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:42,722 INFO L93 Difference]: Finished difference Result 139 states and 206 transitions. [2023-04-01 12:44:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-01 12:44:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:42,733 INFO L225 Difference]: With dead ends: 139 [2023-04-01 12:44:42,733 INFO L226 Difference]: Without dead ends: 91 [2023-04-01 12:44:42,736 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 [2023-04-01 12:44:42,741 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 70 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:42,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 186 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-04-01 12:44:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-04-01 12:44:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 85 states have internal predecessors, (114), 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) [2023-04-01 12:44:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2023-04-01 12:44:42,809 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 42 [2023-04-01 12:44:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:42,810 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2023-04-01 12:44:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:44:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2023-04-01 12:44:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:44:42,813 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:42,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:44:42,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:44:42,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:42,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1092586137, now seen corresponding path program 1 times [2023-04-01 12:44:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:42,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460246797] [2023-04-01 12:44:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:42,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460246797] [2023-04-01 12:44:42,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460246797] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:42,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:42,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333847901] [2023-04-01 12:44:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:42,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:42,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:42,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:42,918 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:44:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:42,998 INFO L93 Difference]: Finished difference Result 201 states and 281 transitions. [2023-04-01 12:44:42,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:42,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-01 12:44:43,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:43,001 INFO L225 Difference]: With dead ends: 201 [2023-04-01 12:44:43,001 INFO L226 Difference]: Without dead ends: 141 [2023-04-01 12:44:43,002 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 [2023-04-01 12:44:43,003 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:43,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 145 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-04-01 12:44:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2023-04-01 12:44:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.385185185185185) internal successors, (187), 135 states have internal predecessors, (187), 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) [2023-04-01 12:44:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 190 transitions. [2023-04-01 12:44:43,028 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 190 transitions. Word has length 45 [2023-04-01 12:44:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:43,029 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 190 transitions. [2023-04-01 12:44:43,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:44:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 190 transitions. [2023-04-01 12:44:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 12:44:43,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:43,030 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] [2023-04-01 12:44:43,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:44:43,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:43,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1298736687, now seen corresponding path program 1 times [2023-04-01 12:44:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:43,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079388241] [2023-04-01 12:44:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:43,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:43,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:43,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079388241] [2023-04-01 12:44:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079388241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:43,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:43,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:43,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754937033] [2023-04-01 12:44:43,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:43,152 INFO L87 Difference]: Start difference. First operand 139 states and 190 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2023-04-01 12:44:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:43,236 INFO L93 Difference]: Finished difference Result 343 states and 488 transitions. [2023-04-01 12:44:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:43,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 48 [2023-04-01 12:44:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:43,242 INFO L225 Difference]: With dead ends: 343 [2023-04-01 12:44:43,242 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 12:44:43,246 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 [2023-04-01 12:44:43,249 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:43,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 12:44:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2023-04-01 12:44:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.4052863436123348) internal successors, (319), 227 states have internal predecessors, (319), 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) [2023-04-01 12:44:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 322 transitions. [2023-04-01 12:44:43,309 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 322 transitions. Word has length 48 [2023-04-01 12:44:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:43,309 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 322 transitions. [2023-04-01 12:44:43,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2023-04-01 12:44:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 322 transitions. [2023-04-01 12:44:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 12:44:43,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:43,313 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] [2023-04-01 12:44:43,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:44:43,314 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:43,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:43,317 INFO L85 PathProgramCache]: Analyzing trace with hash 611192490, now seen corresponding path program 1 times [2023-04-01 12:44:43,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:43,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423061529] [2023-04-01 12:44:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:43,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:43,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423061529] [2023-04-01 12:44:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423061529] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:43,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:43,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195355823] [2023-04-01 12:44:43,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:43,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:43,417 INFO L87 Difference]: Start difference. First operand 231 states and 322 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-04-01 12:44:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:43,523 INFO L93 Difference]: Finished difference Result 603 states and 860 transitions. [2023-04-01 12:44:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 51 [2023-04-01 12:44:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:43,527 INFO L225 Difference]: With dead ends: 603 [2023-04-01 12:44:43,527 INFO L226 Difference]: Without dead ends: 401 [2023-04-01 12:44:43,531 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 [2023-04-01 12:44:43,541 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:43,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 137 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-01 12:44:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 399. [2023-04-01 12:44:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 395 states have (on average 1.4050632911392404) internal successors, (555), 395 states have internal predecessors, (555), 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) [2023-04-01 12:44:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 558 transitions. [2023-04-01 12:44:43,605 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 558 transitions. Word has length 51 [2023-04-01 12:44:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:43,605 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 558 transitions. [2023-04-01 12:44:43,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2023-04-01 12:44:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 558 transitions. [2023-04-01 12:44:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 12:44:43,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:43,610 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] [2023-04-01 12:44:43,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:44:43,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:43,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:43,611 INFO L85 PathProgramCache]: Analyzing trace with hash -205487054, now seen corresponding path program 1 times [2023-04-01 12:44:43,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:43,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326655408] [2023-04-01 12:44:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:43,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:43,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326655408] [2023-04-01 12:44:43,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326655408] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:43,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:43,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:44:43,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298887155] [2023-04-01 12:44:43,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:44:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:44:43,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:44:43,781 INFO L87 Difference]: Start difference. First operand 399 states and 558 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2023-04-01 12:44:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:44,187 INFO L93 Difference]: Finished difference Result 1609 states and 2283 transitions. [2023-04-01 12:44:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:44:44,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 54 [2023-04-01 12:44:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:44,194 INFO L225 Difference]: With dead ends: 1609 [2023-04-01 12:44:44,195 INFO L226 Difference]: Without dead ends: 1239 [2023-04-01 12:44:44,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:44:44,197 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 357 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:44,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 739 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2023-04-01 12:44:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 571. [2023-04-01 12:44:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 567 states have (on average 1.3932980599647267) internal successors, (790), 567 states have internal predecessors, (790), 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) [2023-04-01 12:44:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 793 transitions. [2023-04-01 12:44:44,329 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 793 transitions. Word has length 54 [2023-04-01 12:44:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:44,330 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 793 transitions. [2023-04-01 12:44:44,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2023-04-01 12:44:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 793 transitions. [2023-04-01 12:44:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:44:44,332 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:44,332 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] [2023-04-01 12:44:44,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:44:44,333 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:44,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -797755891, now seen corresponding path program 1 times [2023-04-01 12:44:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:44,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416995764] [2023-04-01 12:44:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:44,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416995764] [2023-04-01 12:44:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416995764] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:44,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:44,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:44:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534018485] [2023-04-01 12:44:44,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:44,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:44:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:44:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:44:44,428 INFO L87 Difference]: Start difference. First operand 571 states and 793 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-04-01 12:44:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:44,652 INFO L93 Difference]: Finished difference Result 1441 states and 2031 transitions. [2023-04-01 12:44:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:44:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 56 [2023-04-01 12:44:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:44,657 INFO L225 Difference]: With dead ends: 1441 [2023-04-01 12:44:44,657 INFO L226 Difference]: Without dead ends: 899 [2023-04-01 12:44:44,659 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 [2023-04-01 12:44:44,660 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 26 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:44,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-01 12:44:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2023-04-01 12:44:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.4042553191489362) internal successors, (1254), 893 states have internal predecessors, (1254), 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) [2023-04-01 12:44:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1257 transitions. [2023-04-01 12:44:44,827 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1257 transitions. Word has length 56 [2023-04-01 12:44:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:44,827 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1257 transitions. [2023-04-01 12:44:44,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-04-01 12:44:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1257 transitions. [2023-04-01 12:44:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 12:44:44,829 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:44,829 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] [2023-04-01 12:44:44,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:44:44,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:44,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash -777706548, now seen corresponding path program 1 times [2023-04-01 12:44:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231296425] [2023-04-01 12:44:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:45,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:45,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231296425] [2023-04-01 12:44:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231296425] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:45,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:45,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:44:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356984847] [2023-04-01 12:44:45,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:45,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:44:45,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:44:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:44:45,136 INFO L87 Difference]: Start difference. First operand 897 states and 1257 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2023-04-01 12:44:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:45,408 INFO L93 Difference]: Finished difference Result 1765 states and 2484 transitions. [2023-04-01 12:44:45,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:44:45,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 56 [2023-04-01 12:44:45,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:45,412 INFO L225 Difference]: With dead ends: 1765 [2023-04-01 12:44:45,413 INFO L226 Difference]: Without dead ends: 899 [2023-04-01 12:44:45,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:44:45,415 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 90 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:45,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 209 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:44:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-04-01 12:44:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2023-04-01 12:44:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.4020156774916013) internal successors, (1252), 893 states have internal predecessors, (1252), 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) [2023-04-01 12:44:45,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1255 transitions. [2023-04-01 12:44:45,558 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1255 transitions. Word has length 56 [2023-04-01 12:44:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:45,558 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1255 transitions. [2023-04-01 12:44:45,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2023-04-01 12:44:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1255 transitions. [2023-04-01 12:44:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:44:45,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:45,559 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] [2023-04-01 12:44:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:44:45,559 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:45,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1658991407, now seen corresponding path program 1 times [2023-04-01 12:44:45,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:45,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262346882] [2023-04-01 12:44:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:45,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:45,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:45,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262346882] [2023-04-01 12:44:45,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262346882] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:45,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:45,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:44:45,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272356149] [2023-04-01 12:44:45,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:45,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:44:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:44:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:44:45,671 INFO L87 Difference]: Start difference. First operand 897 states and 1255 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:45,892 INFO L93 Difference]: Finished difference Result 1763 states and 2479 transitions. [2023-04-01 12:44:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:44:45,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 12:44:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:45,896 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 12:44:45,896 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 12:44:45,898 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 [2023-04-01 12:44:45,900 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 169 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:45,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 12:44:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 12:44:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3796192609182532) internal successors, (1232), 893 states have internal predecessors, (1232), 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) [2023-04-01 12:44:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1235 transitions. [2023-04-01 12:44:46,105 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1235 transitions. Word has length 57 [2023-04-01 12:44:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:46,106 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1235 transitions. [2023-04-01 12:44:46,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1235 transitions. [2023-04-01 12:44:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:44:46,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:46,106 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] [2023-04-01 12:44:46,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:44:46,107 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:46,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1787076714, now seen corresponding path program 1 times [2023-04-01 12:44:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:46,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622616497] [2023-04-01 12:44:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:46,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:46,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622616497] [2023-04-01 12:44:46,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622616497] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:46,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:46,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:44:46,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128987104] [2023-04-01 12:44:46,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:46,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:44:46,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:44:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:44:46,195 INFO L87 Difference]: Start difference. First operand 897 states and 1235 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:46,433 INFO L93 Difference]: Finished difference Result 1763 states and 2439 transitions. [2023-04-01 12:44:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:44:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 12:44:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:46,437 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 12:44:46,437 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 12:44:46,439 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 [2023-04-01 12:44:46,441 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 153 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:46,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 69 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 12:44:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 12:44:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3617021276595744) internal successors, (1216), 893 states have internal predecessors, (1216), 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) [2023-04-01 12:44:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1219 transitions. [2023-04-01 12:44:46,594 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1219 transitions. Word has length 57 [2023-04-01 12:44:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:46,595 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1219 transitions. [2023-04-01 12:44:46,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1219 transitions. [2023-04-01 12:44:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:44:46,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:46,595 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] [2023-04-01 12:44:46,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:44:46,596 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:46,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1642358193, now seen corresponding path program 1 times [2023-04-01 12:44:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:46,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675327632] [2023-04-01 12:44:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:46,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:46,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:46,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675327632] [2023-04-01 12:44:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675327632] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:46,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:44:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916965857] [2023-04-01 12:44:46,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:46,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:44:46,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:46,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:44:46,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:44:46,684 INFO L87 Difference]: Start difference. First operand 897 states and 1219 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:46,911 INFO L93 Difference]: Finished difference Result 1763 states and 2407 transitions. [2023-04-01 12:44:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:44:46,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 12:44:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:46,915 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 12:44:46,915 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 12:44:46,917 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 [2023-04-01 12:44:46,917 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 137 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:46,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 12:44:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 12:44:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3460246360582306) internal successors, (1202), 893 states have internal predecessors, (1202), 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) [2023-04-01 12:44:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1205 transitions. [2023-04-01 12:44:47,112 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1205 transitions. Word has length 57 [2023-04-01 12:44:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:47,112 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1205 transitions. [2023-04-01 12:44:47,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1205 transitions. [2023-04-01 12:44:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:44:47,113 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:47,113 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] [2023-04-01 12:44:47,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:44:47,113 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:47,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2123318602, now seen corresponding path program 1 times [2023-04-01 12:44:47,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:47,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172553865] [2023-04-01 12:44:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:47,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:47,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:47,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172553865] [2023-04-01 12:44:47,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172553865] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:47,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:47,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:44:47,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679686276] [2023-04-01 12:44:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:47,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:44:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:44:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:44:47,232 INFO L87 Difference]: Start difference. First operand 897 states and 1205 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:47,515 INFO L93 Difference]: Finished difference Result 1763 states and 2379 transitions. [2023-04-01 12:44:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:44:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 57 [2023-04-01 12:44:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:47,520 INFO L225 Difference]: With dead ends: 1763 [2023-04-01 12:44:47,520 INFO L226 Difference]: Without dead ends: 897 [2023-04-01 12:44:47,523 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 [2023-04-01 12:44:47,524 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:47,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-04-01 12:44:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 897. [2023-04-01 12:44:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 893 states have (on average 1.3101903695408734) internal successors, (1170), 893 states have internal predecessors, (1170), 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) [2023-04-01 12:44:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1173 transitions. [2023-04-01 12:44:47,739 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1173 transitions. Word has length 57 [2023-04-01 12:44:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:47,739 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1173 transitions. [2023-04-01 12:44:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-04-01 12:44:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1173 transitions. [2023-04-01 12:44:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 12:44:47,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:47,744 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] [2023-04-01 12:44:47,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:44:47,744 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:47,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1360454895, now seen corresponding path program 1 times [2023-04-01 12:44:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:47,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189075832] [2023-04-01 12:44:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:47,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:47,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189075832] [2023-04-01 12:44:47,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189075832] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:44:47,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:44:47,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:44:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804226204] [2023-04-01 12:44:47,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:44:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:44:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:44:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:44:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:44:47,941 INFO L87 Difference]: Start difference. First operand 897 states and 1173 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2023-04-01 12:44:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:44:48,319 INFO L93 Difference]: Finished difference Result 1448 states and 1879 transitions. [2023-04-01 12:44:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:44:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 57 [2023-04-01 12:44:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:44:48,324 INFO L225 Difference]: With dead ends: 1448 [2023-04-01 12:44:48,324 INFO L226 Difference]: Without dead ends: 1446 [2023-04-01 12:44:48,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:44:48,326 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 75 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:44:48,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 325 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:44:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2023-04-01 12:44:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 929. [2023-04-01 12:44:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 925 states have (on average 1.2735135135135136) internal successors, (1178), 925 states have internal predecessors, (1178), 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) [2023-04-01 12:44:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1181 transitions. [2023-04-01 12:44:48,577 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1181 transitions. Word has length 57 [2023-04-01 12:44:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:44:48,577 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1181 transitions. [2023-04-01 12:44:48,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2023-04-01 12:44:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1181 transitions. [2023-04-01 12:44:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 12:44:48,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:44:48,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:44:48,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:44:48,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:44:48,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:44:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash 795672639, now seen corresponding path program 1 times [2023-04-01 12:44:48,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:44:48,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117337083] [2023-04-01 12:44:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:48,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:44:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:44:53,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:44:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117337083] [2023-04-01 12:44:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117337083] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:44:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361035511] [2023-04-01 12:44:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:44:53,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:44:53,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:44:53,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:44:53,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:44:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:44:53,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 68 conjunts are in the unsatisfiable core [2023-04-01 12:44:53,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:45:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:45:01,588 INFO L327 TraceCheckSpWp]: Computing backward predicates...