/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 03:15:14,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 03:15:14,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 03:15:14,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 03:15:14,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 03:15:14,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 03:15:14,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 03:15:14,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 03:15:14,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 03:15:14,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 03:15:14,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 03:15:14,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 03:15:14,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 03:15:14,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 03:15:14,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 03:15:14,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 03:15:14,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 03:15:14,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 03:15:14,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 03:15:14,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 03:15:14,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 03:15:14,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 03:15:14,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 03:15:14,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 03:15:14,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 03:15:14,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 03:15:14,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 03:15:14,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 03:15:14,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 03:15:14,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 03:15:14,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 03:15:14,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 03:15:14,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 03:15:14,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 03:15:14,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 03:15:14,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 03:15:14,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 03:15:14,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 03:15:14,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 03:15:14,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 03:15:14,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 03:15:14,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 03:15:14,434 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 03:15:14,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 03:15:14,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 03:15:14,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 03:15:14,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 03:15:14,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 03:15:14,435 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 03:15:14,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 03:15:14,435 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 03:15:14,435 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 03:15:14,436 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 03:15:14,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 03:15:14,436 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 03:15:14,436 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 03:15:14,436 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 03:15:14,436 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 03:15:14,436 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 03:15:14,436 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 03:15:14,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 03:15:14,437 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 03:15:14,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 03:15:14,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 03:15:14,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 03:15:14,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 03:15:14,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:15:14,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 03:15:14,438 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 03:15:14,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 03:15:14,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 03:15:14,439 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 03:15:14,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 03:15:14,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 03:15:14,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 03:15:14,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 03:15:14,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 03:15:14,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 03:15:14,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 03:15:14,647 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 03:15:14,648 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 03:15:14,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:15:15,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 03:15:15,981 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 03:15:15,981 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:15:15,988 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac3e7d63/00baa3e4f9ba49c5b22fb61e886774dd/FLAG9c115dd58 [2023-04-03 03:15:15,997 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ac3e7d63/00baa3e4f9ba49c5b22fb61e886774dd [2023-04-03 03:15:15,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 03:15:16,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 03:15:16,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 03:15:16,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 03:15:16,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 03:15:16,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:15:15" (1/1) ... [2023-04-03 03:15:16,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d348b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16, skipping insertion in model container [2023-04-03 03:15:16,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 03:15:15" (1/1) ... [2023-04-03 03:15:16,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 03:15:16,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 03:15:16,211 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.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6730,6743] [2023-04-03 03:15:16,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:15:16,246 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 03:15:16,291 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.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6730,6743] [2023-04-03 03:15:16,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 03:15:16,314 INFO L208 MainTranslator]: Completed translation [2023-04-03 03:15:16,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16 WrapperNode [2023-04-03 03:15:16,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 03:15:16,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 03:15:16,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 03:15:16,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 03:15:16,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,349 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 03:15:16,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 03:15:16,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 03:15:16,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 03:15:16,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (1/1) ... [2023-04-03 03:15:16,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 03:15:16,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:15:16,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 03:15:16,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 03:15:16,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 03:15:16,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 03:15:16,426 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 03:15:16,426 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 03:15:16,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 03:15:16,427 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 03:15:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 03:15:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 03:15:16,531 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 03:15:16,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 03:15:16,893 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 03:15:16,969 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 03:15:16,969 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 03:15:16,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:15:16 BoogieIcfgContainer [2023-04-03 03:15:16,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 03:15:16,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 03:15:16,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 03:15:16,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 03:15:16,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 03:15:15" (1/3) ... [2023-04-03 03:15:16,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5bc397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:15:16, skipping insertion in model container [2023-04-03 03:15:16,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 03:15:16" (2/3) ... [2023-04-03 03:15:16,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5bc397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 03:15:16, skipping insertion in model container [2023-04-03 03:15:16,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 03:15:16" (3/3) ... [2023-04-03 03:15:17,000 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 03:15:17,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 03:15:17,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 03:15:17,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 03:15:17,060 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;@6d1c7c47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 03:15:17,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 03:15:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 89 states have (on average 1.7303370786516854) internal successors, (154), 91 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 03:15:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 03:15:17,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:17,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:17,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:17,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:17,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1121163923, now seen corresponding path program 1 times [2023-04-03 03:15:17,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:17,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795251303] [2023-04-03 03:15:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:17,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:17,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:17,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795251303] [2023-04-03 03:15:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795251303] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:17,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:17,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:15:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382794990] [2023-04-03 03:15:17,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:15:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:15:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:17,510 INFO L87 Difference]: Start difference. First operand has 96 states, 89 states have (on average 1.7303370786516854) internal successors, (154), 91 states have internal predecessors, (154), 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 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:17,592 INFO L93 Difference]: Finished difference Result 192 states and 294 transitions. [2023-04-03 03:15:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:15:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2023-04-03 03:15:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:17,600 INFO L225 Difference]: With dead ends: 192 [2023-04-03 03:15:17,601 INFO L226 Difference]: Without dead ends: 132 [2023-04-03 03:15:17,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:17,605 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 105 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:17,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 268 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-03 03:15:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2023-04-03 03:15:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.3253968253968254) internal successors, (167), 126 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2023-04-03 03:15:17,667 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 63 [2023-04-03 03:15:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:17,667 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2023-04-03 03:15:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2023-04-03 03:15:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-03 03:15:17,672 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:17,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:17,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 03:15:17,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:17,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1592593816, now seen corresponding path program 1 times [2023-04-03 03:15:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:17,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762513058] [2023-04-03 03:15:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:17,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:17,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762513058] [2023-04-03 03:15:17,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762513058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:17,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:17,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:15:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862995007] [2023-04-03 03:15:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:17,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:15:17,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:17,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:15:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:17,830 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:17,905 INFO L93 Difference]: Finished difference Result 290 states and 406 transitions. [2023-04-03 03:15:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:15:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 66 [2023-04-03 03:15:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:17,909 INFO L225 Difference]: With dead ends: 290 [2023-04-03 03:15:17,909 INFO L226 Difference]: Without dead ends: 206 [2023-04-03 03:15:17,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:17,911 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:17,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 210 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-04-03 03:15:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2023-04-03 03:15:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.38) internal successors, (276), 200 states have internal predecessors, (276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 279 transitions. [2023-04-03 03:15:17,949 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 279 transitions. Word has length 66 [2023-04-03 03:15:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:17,950 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 279 transitions. [2023-04-03 03:15:17,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 279 transitions. [2023-04-03 03:15:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-03 03:15:17,955 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:17,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:17,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 03:15:17,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:17,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash 789127290, now seen corresponding path program 1 times [2023-04-03 03:15:17,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:17,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653067230] [2023-04-03 03:15:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:17,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:18,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:18,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653067230] [2023-04-03 03:15:18,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653067230] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:18,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:18,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:15:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410047484] [2023-04-03 03:15:18,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:18,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:15:18,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:15:18,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:18,054 INFO L87 Difference]: Start difference. First operand 204 states and 279 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:18,133 INFO L93 Difference]: Finished difference Result 504 states and 721 transitions. [2023-04-03 03:15:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:15:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 69 [2023-04-03 03:15:18,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:18,139 INFO L225 Difference]: With dead ends: 504 [2023-04-03 03:15:18,139 INFO L226 Difference]: Without dead ends: 346 [2023-04-03 03:15:18,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:18,146 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 55 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:18,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 206 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-04-03 03:15:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2023-04-03 03:15:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 340 states have (on average 1.411764705882353) internal successors, (480), 340 states have internal predecessors, (480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 483 transitions. [2023-04-03 03:15:18,191 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 483 transitions. Word has length 69 [2023-04-03 03:15:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:18,191 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 483 transitions. [2023-04-03 03:15:18,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 483 transitions. [2023-04-03 03:15:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-03 03:15:18,192 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:18,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:18,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 03:15:18,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:18,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1227623603, now seen corresponding path program 1 times [2023-04-03 03:15:18,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307778494] [2023-04-03 03:15:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:18,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:18,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307778494] [2023-04-03 03:15:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307778494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:18,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:18,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:15:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470420556] [2023-04-03 03:15:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:15:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:15:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:18,276 INFO L87 Difference]: Start difference. First operand 344 states and 483 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:18,375 INFO L93 Difference]: Finished difference Result 908 states and 1309 transitions. [2023-04-03 03:15:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:15:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 72 [2023-04-03 03:15:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:18,378 INFO L225 Difference]: With dead ends: 908 [2023-04-03 03:15:18,379 INFO L226 Difference]: Without dead ends: 610 [2023-04-03 03:15:18,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:18,387 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:18,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 202 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-04-03 03:15:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 608. [2023-04-03 03:15:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 604 states have (on average 1.423841059602649) internal successors, (860), 604 states have internal predecessors, (860), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 863 transitions. [2023-04-03 03:15:18,459 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 863 transitions. Word has length 72 [2023-04-03 03:15:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:18,459 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 863 transitions. [2023-04-03 03:15:18,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 863 transitions. [2023-04-03 03:15:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 03:15:18,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:18,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:18,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 03:15:18,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:18,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:18,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1148223856, now seen corresponding path program 1 times [2023-04-03 03:15:18,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:18,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070679491] [2023-04-03 03:15:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:18,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:18,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070679491] [2023-04-03 03:15:18,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070679491] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:18,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:18,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:15:18,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981164713] [2023-04-03 03:15:18,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:18,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:15:18,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:15:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:18,546 INFO L87 Difference]: Start difference. First operand 608 states and 863 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:18,697 INFO L93 Difference]: Finished difference Result 1668 states and 2401 transitions. [2023-04-03 03:15:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:15:18,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 75 [2023-04-03 03:15:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:18,703 INFO L225 Difference]: With dead ends: 1668 [2023-04-03 03:15:18,703 INFO L226 Difference]: Without dead ends: 1106 [2023-04-03 03:15:18,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:18,705 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 45 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:18,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 198 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2023-04-03 03:15:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1104. [2023-04-03 03:15:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1100 states have (on average 1.4218181818181819) internal successors, (1564), 1100 states have internal predecessors, (1564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1567 transitions. [2023-04-03 03:15:18,903 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1567 transitions. Word has length 75 [2023-04-03 03:15:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:18,905 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1567 transitions. [2023-04-03 03:15:18,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1567 transitions. [2023-04-03 03:15:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-03 03:15:18,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:18,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:18,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 03:15:18,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:18,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:18,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1568238065, now seen corresponding path program 1 times [2023-04-03 03:15:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:18,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520929788] [2023-04-03 03:15:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:18,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:18,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:18,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520929788] [2023-04-03 03:15:18,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520929788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:18,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:18,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:15:18,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883500998] [2023-04-03 03:15:18,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:18,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:15:18,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:18,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:15:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:19,000 INFO L87 Difference]: Start difference. First operand 1104 states and 1567 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:19,273 INFO L93 Difference]: Finished difference Result 3092 states and 4417 transitions. [2023-04-03 03:15:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:15:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 78 [2023-04-03 03:15:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:19,279 INFO L225 Difference]: With dead ends: 3092 [2023-04-03 03:15:19,279 INFO L226 Difference]: Without dead ends: 2034 [2023-04-03 03:15:19,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:19,281 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 40 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:19,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-04-03 03:15:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2032. [2023-04-03 03:15:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2028 states have (on average 1.4102564102564104) internal successors, (2860), 2028 states have internal predecessors, (2860), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2863 transitions. [2023-04-03 03:15:19,541 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2863 transitions. Word has length 78 [2023-04-03 03:15:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:19,542 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 2863 transitions. [2023-04-03 03:15:19,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2863 transitions. [2023-04-03 03:15:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-03 03:15:19,547 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:19,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 03:15:19,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:19,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 153647088, now seen corresponding path program 1 times [2023-04-03 03:15:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:19,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573707983] [2023-04-03 03:15:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:19,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:19,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:19,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573707983] [2023-04-03 03:15:19,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573707983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:19,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:19,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 03:15:19,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912297607] [2023-04-03 03:15:19,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:19,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 03:15:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:19,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 03:15:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-03 03:15:19,721 INFO L87 Difference]: Start difference. First operand 2032 states and 2863 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:20,646 INFO L93 Difference]: Finished difference Result 8262 states and 11744 transitions. [2023-04-03 03:15:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 03:15:20,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 81 [2023-04-03 03:15:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:20,663 INFO L225 Difference]: With dead ends: 8262 [2023-04-03 03:15:20,663 INFO L226 Difference]: Without dead ends: 6276 [2023-04-03 03:15:20,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-04-03 03:15:20,668 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 809 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:20,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 2181 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 03:15:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2023-04-03 03:15:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 2732. [2023-04-03 03:15:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2728 states have (on average 1.3984604105571847) internal successors, (3815), 2728 states have internal predecessors, (3815), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3818 transitions. [2023-04-03 03:15:21,039 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3818 transitions. Word has length 81 [2023-04-03 03:15:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:21,039 INFO L495 AbstractCegarLoop]: Abstraction has 2732 states and 3818 transitions. [2023-04-03 03:15:21,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3818 transitions. [2023-04-03 03:15:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 03:15:21,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:21,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:21,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 03:15:21,040 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:21,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash 732773099, now seen corresponding path program 1 times [2023-04-03 03:15:21,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:21,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530999441] [2023-04-03 03:15:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:21,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:21,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:21,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530999441] [2023-04-03 03:15:21,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530999441] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:21,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 03:15:21,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448975497] [2023-04-03 03:15:21,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:21,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 03:15:21,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 03:15:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:21,137 INFO L87 Difference]: Start difference. First operand 2732 states and 3818 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:21,668 INFO L93 Difference]: Finished difference Result 6986 states and 9844 transitions. [2023-04-03 03:15:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 03:15:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 83 [2023-04-03 03:15:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:21,682 INFO L225 Difference]: With dead ends: 6986 [2023-04-03 03:15:21,682 INFO L226 Difference]: Without dead ends: 4300 [2023-04-03 03:15:21,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 03:15:21,689 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:21,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 162 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2023-04-03 03:15:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4298. [2023-04-03 03:15:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.4054494643688868) internal successors, (6035), 4294 states have internal predecessors, (6035), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 6038 transitions. [2023-04-03 03:15:22,201 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 6038 transitions. Word has length 83 [2023-04-03 03:15:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:22,201 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 6038 transitions. [2023-04-03 03:15:22,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 6038 transitions. [2023-04-03 03:15:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-04-03 03:15:22,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:22,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:22,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 03:15:22,202 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:22,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:22,203 INFO L85 PathProgramCache]: Analyzing trace with hash 752822442, now seen corresponding path program 1 times [2023-04-03 03:15:22,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:22,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288669165] [2023-04-03 03:15:22,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:22,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:22,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:22,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288669165] [2023-04-03 03:15:22,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288669165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:22,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:22,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-03 03:15:22,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959300794] [2023-04-03 03:15:22,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:22,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 03:15:22,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 03:15:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-03 03:15:22,484 INFO L87 Difference]: Start difference. First operand 4298 states and 6038 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:23,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:23,165 INFO L93 Difference]: Finished difference Result 8550 states and 12029 transitions. [2023-04-03 03:15:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 03:15:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 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 83 [2023-04-03 03:15:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:23,178 INFO L225 Difference]: With dead ends: 8550 [2023-04-03 03:15:23,178 INFO L226 Difference]: Without dead ends: 4300 [2023-04-03 03:15:23,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-03 03:15:23,185 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 167 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:23,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 427 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 03:15:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2023-04-03 03:15:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4298. [2023-04-03 03:15:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.404983698183512) internal successors, (6033), 4294 states have internal predecessors, (6033), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 6036 transitions. [2023-04-03 03:15:23,660 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 6036 transitions. Word has length 83 [2023-04-03 03:15:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:23,661 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 6036 transitions. [2023-04-03 03:15:23,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 6036 transitions. [2023-04-03 03:15:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 03:15:23,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:23,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:23,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 03:15:23,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:23,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1860749910, now seen corresponding path program 1 times [2023-04-03 03:15:23,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:23,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237725624] [2023-04-03 03:15:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:23,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:23,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237725624] [2023-04-03 03:15:23,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237725624] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:23,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:23,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:15:23,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205211211] [2023-04-03 03:15:23,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:23,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:15:23,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:15:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:15:23,739 INFO L87 Difference]: Start difference. First operand 4298 states and 6036 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:24,289 INFO L93 Difference]: Finished difference Result 8548 states and 12024 transitions. [2023-04-03 03:15:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:15:24,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 84 [2023-04-03 03:15:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:24,302 INFO L225 Difference]: With dead ends: 8548 [2023-04-03 03:15:24,302 INFO L226 Difference]: Without dead ends: 4298 [2023-04-03 03:15:24,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:15:24,308 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 257 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:24,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 82 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2023-04-03 03:15:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4298. [2023-04-03 03:15:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.3863530507685142) internal successors, (5953), 4294 states have internal predecessors, (5953), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5956 transitions. [2023-04-03 03:15:24,899 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5956 transitions. Word has length 84 [2023-04-03 03:15:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:24,899 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 5956 transitions. [2023-04-03 03:15:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5956 transitions. [2023-04-03 03:15:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 03:15:24,900 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:24,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:24,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 03:15:24,901 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:24,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:24,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2065946159, now seen corresponding path program 1 times [2023-04-03 03:15:24,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:24,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461384277] [2023-04-03 03:15:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:24,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:24,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:24,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461384277] [2023-04-03 03:15:24,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461384277] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:24,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:24,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:15:24,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427503489] [2023-04-03 03:15:24,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:24,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:15:24,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:24,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:15:24,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:15:24,989 INFO L87 Difference]: Start difference. First operand 4298 states and 5956 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:25,787 INFO L93 Difference]: Finished difference Result 8548 states and 11864 transitions. [2023-04-03 03:15:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:15:25,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 84 [2023-04-03 03:15:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:25,805 INFO L225 Difference]: With dead ends: 8548 [2023-04-03 03:15:25,805 INFO L226 Difference]: Without dead ends: 4298 [2023-04-03 03:15:25,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:15:25,815 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 241 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:25,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 90 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2023-04-03 03:15:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4298. [2023-04-03 03:15:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.371448532836516) internal successors, (5889), 4294 states have internal predecessors, (5889), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5892 transitions. [2023-04-03 03:15:26,470 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5892 transitions. Word has length 84 [2023-04-03 03:15:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:26,470 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 5892 transitions. [2023-04-03 03:15:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5892 transitions. [2023-04-03 03:15:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 03:15:26,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:26,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:26,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 03:15:26,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:26,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1466157430, now seen corresponding path program 1 times [2023-04-03 03:15:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:26,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468538834] [2023-04-03 03:15:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:26,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:26,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:26,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468538834] [2023-04-03 03:15:26,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468538834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:26,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:26,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:15:26,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862897038] [2023-04-03 03:15:26,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:26,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:15:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:26,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:15:26,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:15:26,574 INFO L87 Difference]: Start difference. First operand 4298 states and 5892 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:27,203 INFO L93 Difference]: Finished difference Result 8548 states and 11736 transitions. [2023-04-03 03:15:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 03:15:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 84 [2023-04-03 03:15:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:27,210 INFO L225 Difference]: With dead ends: 8548 [2023-04-03 03:15:27,210 INFO L226 Difference]: Without dead ends: 4298 [2023-04-03 03:15:27,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 03:15:27,215 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 212 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:27,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 106 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2023-04-03 03:15:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4298. [2023-04-03 03:15:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 4294 states have (on average 1.3593386120167676) internal successors, (5837), 4294 states have internal predecessors, (5837), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5840 transitions. [2023-04-03 03:15:27,777 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5840 transitions. Word has length 84 [2023-04-03 03:15:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:27,778 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 5840 transitions. [2023-04-03 03:15:27,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5840 transitions. [2023-04-03 03:15:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 03:15:27,778 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:27,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:27,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 03:15:27,778 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:27,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:27,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1963277477, now seen corresponding path program 1 times [2023-04-03 03:15:27,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:27,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434256169] [2023-04-03 03:15:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:27,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:27,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:27,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434256169] [2023-04-03 03:15:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434256169] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 03:15:27,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 03:15:27,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 03:15:27,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304426408] [2023-04-03 03:15:27,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 03:15:27,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 03:15:27,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 03:15:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 03:15:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 03:15:27,968 INFO L87 Difference]: Start difference. First operand 4298 states and 5840 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 03:15:29,170 INFO L93 Difference]: Finished difference Result 7189 states and 9662 transitions. [2023-04-03 03:15:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 03:15:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 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 84 [2023-04-03 03:15:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 03:15:29,181 INFO L225 Difference]: With dead ends: 7189 [2023-04-03 03:15:29,181 INFO L226 Difference]: Without dead ends: 7187 [2023-04-03 03:15:29,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 03:15:29,183 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 113 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 03:15:29,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 495 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 03:15:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2023-04-03 03:15:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 4426. [2023-04-03 03:15:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4422 states have (on average 1.3272274988692898) internal successors, (5869), 4422 states have internal predecessors, (5869), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 5872 transitions. [2023-04-03 03:15:29,987 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 5872 transitions. Word has length 84 [2023-04-03 03:15:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 03:15:29,987 INFO L495 AbstractCegarLoop]: Abstraction has 4426 states and 5872 transitions. [2023-04-03 03:15:29,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 03:15:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 5872 transitions. [2023-04-03 03:15:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-03 03:15:29,988 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 03:15:29,988 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 03:15:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 03:15:29,989 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 03:15:29,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 03:15:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1937180943, now seen corresponding path program 1 times [2023-04-03 03:15:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 03:15:29,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558005103] [2023-04-03 03:15:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:29,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 03:15:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:37,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 03:15:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558005103] [2023-04-03 03:15:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558005103] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 03:15:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484754965] [2023-04-03 03:15:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 03:15:37,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 03:15:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 03:15:37,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 03:15:37,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 03:15:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 03:15:37,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 86 conjunts are in the unsatisfiable core [2023-04-03 03:15:37,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 03:15:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 03:15:52,845 INFO L327 TraceCheckSpWp]: Computing backward predicates...