/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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:28:04,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:28:04,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:28:04,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:28:04,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:28:04,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:28:04,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:28:04,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:28:04,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:28:04,620 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:28:04,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:28:04,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:28:04,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:28:04,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:28:04,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:28:04,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:28:04,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:28:04,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:28:04,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:28:04,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:28:04,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:28:04,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:28:04,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:28:04,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:28:04,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:28:04,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:28:04,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:28:04,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:28:04,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:28:04,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:28:04,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:28:04,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:28:04,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:28:04,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:28:04,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:28:04,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:28:04,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:28:04,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:28:04,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:28:04,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:28:04,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:28:04,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:28:04,662 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:28:04,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:28:04,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:28:04,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:28:04,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:28:04,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:28:04,663 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:28:04,663 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:28:04,664 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:28:04,664 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:28:04,664 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:28:04,664 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:28:04,665 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:28:04,665 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:28:04,665 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:28:04,665 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:28:04,665 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:28:04,665 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:28:04,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:28:04,666 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:28:04,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:28:04,667 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:28:04,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:28:04,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:28:04,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:28:04,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:28:04,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:28:04,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:28:04,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:28:04,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:28:04,668 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:28:04,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:28:04,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:28:04,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:28:04,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:28:04,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:28:04,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:28:04,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:28:04,928 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:28:04,929 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:28:04,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:28:06,092 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:28:06,368 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:28:06,369 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:28:06,394 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c3b23cb/3f354073deed4f6db4eadd23b921055e/FLAGb728b82a5 [2023-04-01 06:28:06,408 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55c3b23cb/3f354073deed4f6db4eadd23b921055e [2023-04-01 06:28:06,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:28:06,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:28:06,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:28:06,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:28:06,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:28:06,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:28:06" (1/1) ... [2023-04-01 06:28:06,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68181fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:06, skipping insertion in model container [2023-04-01 06:28:06,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:28:06" (1/1) ... [2023-04-01 06:28:06,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:28:06,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:28:06,903 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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2023-04-01 06:28:07,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:28:07,044 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:28:07,309 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_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[24502,24515] [2023-04-01 06:28:07,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:28:07,409 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:28:07,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07 WrapperNode [2023-04-01 06:28:07,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:28:07,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:28:07,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:28:07,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:28:07,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:28:07,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:28:07,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:28:07,541 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:28:07,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (1/1) ... [2023-04-01 06:28:07,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:28:07,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:28:07,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:28:07,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:28:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:28:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:28:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:28:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:28:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:28:07,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:28:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:28:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:28:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:28:07,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:28:07,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:28:07,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:28:07,839 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:28:07,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:28:09,340 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:28:09,766 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:28:09,766 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:28:09,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:28:09 BoogieIcfgContainer [2023-04-01 06:28:09,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:28:09,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:28:09,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:28:09,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:28:09,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:28:06" (1/3) ... [2023-04-01 06:28:09,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179c76f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:28:09, skipping insertion in model container [2023-04-01 06:28:09,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:28:07" (2/3) ... [2023-04-01 06:28:09,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179c76f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:28:09, skipping insertion in model container [2023-04-01 06:28:09,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:28:09" (3/3) ... [2023-04-01 06:28:09,780 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-01 06:28:09,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:28:09,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:28:09,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:28:09,854 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;@28ba6fcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:28:09,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:28:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 484 states, 471 states have (on average 1.70276008492569) internal successors, (802), 479 states have internal predecessors, (802), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 06:28:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-04-01 06:28:09,880 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:09,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:09,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:09,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:09,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1257906570, now seen corresponding path program 1 times [2023-04-01 06:28:09,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:09,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563632282] [2023-04-01 06:28:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:09,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:11,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:11,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563632282] [2023-04-01 06:28:11,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563632282] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:11,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:11,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:28:11,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678515494] [2023-04-01 06:28:11,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:11,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:28:11,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:28:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:28:11,344 INFO L87 Difference]: Start difference. First operand has 484 states, 471 states have (on average 1.70276008492569) internal successors, (802), 479 states have internal predecessors, (802), 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 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:11,774 INFO L93 Difference]: Finished difference Result 1416 states and 2365 transitions. [2023-04-01 06:28:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:28:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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 215 [2023-04-01 06:28:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:11,799 INFO L225 Difference]: With dead ends: 1416 [2023-04-01 06:28:11,800 INFO L226 Difference]: Without dead ends: 923 [2023-04-01 06:28:11,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:11,812 INFO L413 NwaCegarLoop]: 1223 mSDtfsCounter, 1754 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:11,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 1949 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-04-01 06:28:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 921. [2023-04-01 06:28:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 917 states have (on average 1.4034896401308614) internal successors, (1287), 917 states have internal predecessors, (1287), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1290 transitions. [2023-04-01 06:28:11,934 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1290 transitions. Word has length 215 [2023-04-01 06:28:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:11,935 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1290 transitions. [2023-04-01 06:28:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1290 transitions. [2023-04-01 06:28:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 06:28:11,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:11,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:11,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:28:11,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:11,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1547491957, now seen corresponding path program 1 times [2023-04-01 06:28:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771324005] [2023-04-01 06:28:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:12,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:12,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771324005] [2023-04-01 06:28:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771324005] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:12,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:12,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:28:12,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500994020] [2023-04-01 06:28:12,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:12,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:28:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:28:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:12,172 INFO L87 Difference]: Start difference. First operand 921 states and 1290 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:12,455 INFO L93 Difference]: Finished difference Result 2602 states and 3624 transitions. [2023-04-01 06:28:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:28:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 217 [2023-04-01 06:28:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:12,472 INFO L225 Difference]: With dead ends: 2602 [2023-04-01 06:28:12,473 INFO L226 Difference]: Without dead ends: 1806 [2023-04-01 06:28:12,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:12,480 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 543 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:12,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1760 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:28:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-04-01 06:28:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1804. [2023-04-01 06:28:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1800 states have (on average 1.3977777777777778) internal successors, (2516), 1800 states have internal predecessors, (2516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2519 transitions. [2023-04-01 06:28:12,657 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2519 transitions. Word has length 217 [2023-04-01 06:28:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:12,659 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2519 transitions. [2023-04-01 06:28:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2519 transitions. [2023-04-01 06:28:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-04-01 06:28:12,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:12,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:28:12,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:12,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1941803802, now seen corresponding path program 1 times [2023-04-01 06:28:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:12,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035673284] [2023-04-01 06:28:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:12,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:12,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035673284] [2023-04-01 06:28:12,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035673284] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:12,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:12,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:28:12,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333820834] [2023-04-01 06:28:12,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:12,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:28:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:28:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:12,857 INFO L87 Difference]: Start difference. First operand 1804 states and 2519 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:13,313 INFO L93 Difference]: Finished difference Result 5252 states and 7316 transitions. [2023-04-01 06:28:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:28:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 217 [2023-04-01 06:28:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:13,329 INFO L225 Difference]: With dead ends: 5252 [2023-04-01 06:28:13,330 INFO L226 Difference]: Without dead ends: 3584 [2023-04-01 06:28:13,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:13,341 INFO L413 NwaCegarLoop]: 1242 mSDtfsCounter, 652 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:13,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1862 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:28:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2023-04-01 06:28:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 1807. [2023-04-01 06:28:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1803 states have (on average 1.397115917914587) internal successors, (2519), 1803 states have internal predecessors, (2519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2522 transitions. [2023-04-01 06:28:13,565 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2522 transitions. Word has length 217 [2023-04-01 06:28:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:13,565 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2522 transitions. [2023-04-01 06:28:13,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2522 transitions. [2023-04-01 06:28:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-04-01 06:28:13,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:13,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:13,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:28:13,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:13,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:13,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1507846328, now seen corresponding path program 1 times [2023-04-01 06:28:13,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:13,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613501158] [2023-04-01 06:28:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:14,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:14,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613501158] [2023-04-01 06:28:14,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613501158] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:14,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:14,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:28:14,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352830773] [2023-04-01 06:28:14,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:14,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:28:14,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:28:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:14,264 INFO L87 Difference]: Start difference. First operand 1807 states and 2522 transitions. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:14,872 INFO L93 Difference]: Finished difference Result 5211 states and 7253 transitions. [2023-04-01 06:28:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:28:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 218 [2023-04-01 06:28:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:14,886 INFO L225 Difference]: With dead ends: 5211 [2023-04-01 06:28:14,886 INFO L226 Difference]: Without dead ends: 3423 [2023-04-01 06:28:14,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:14,895 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 1271 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:14,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 2175 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2023-04-01 06:28:15,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 3421. [2023-04-01 06:28:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3417 states have (on average 1.3819139596136962) internal successors, (4722), 3417 states have internal predecessors, (4722), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 4725 transitions. [2023-04-01 06:28:15,310 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 4725 transitions. Word has length 218 [2023-04-01 06:28:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:15,311 INFO L495 AbstractCegarLoop]: Abstraction has 3421 states and 4725 transitions. [2023-04-01 06:28:15,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 4725 transitions. [2023-04-01 06:28:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-04-01 06:28:15,318 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:15,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:15,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:28:15,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:15,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:15,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1113564035, now seen corresponding path program 1 times [2023-04-01 06:28:15,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:15,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160666407] [2023-04-01 06:28:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:15,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:15,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:15,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160666407] [2023-04-01 06:28:15,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160666407] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:15,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:15,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:28:15,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523336803] [2023-04-01 06:28:15,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:15,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:28:15,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:28:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:28:15,958 INFO L87 Difference]: Start difference. First operand 3421 states and 4725 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:16,944 INFO L93 Difference]: Finished difference Result 9963 states and 13730 transitions. [2023-04-01 06:28:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:28:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 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 219 [2023-04-01 06:28:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:16,968 INFO L225 Difference]: With dead ends: 9963 [2023-04-01 06:28:16,969 INFO L226 Difference]: Without dead ends: 6684 [2023-04-01 06:28:16,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:16,978 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 1421 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:16,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1421 Valid, 1582 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6684 states. [2023-04-01 06:28:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6684 to 6682. [2023-04-01 06:28:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6678 states have (on average 1.3722671458520515) internal successors, (9164), 6678 states have internal predecessors, (9164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 9167 transitions. [2023-04-01 06:28:17,809 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 9167 transitions. Word has length 219 [2023-04-01 06:28:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:17,810 INFO L495 AbstractCegarLoop]: Abstraction has 6682 states and 9167 transitions. [2023-04-01 06:28:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 9167 transitions. [2023-04-01 06:28:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-04-01 06:28:17,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:17,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:17,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:28:17,823 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:17,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1437558928, now seen corresponding path program 1 times [2023-04-01 06:28:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:17,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060250501] [2023-04-01 06:28:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:18,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:18,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060250501] [2023-04-01 06:28:18,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060250501] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:18,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:18,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:28:18,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017874194] [2023-04-01 06:28:18,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:18,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:28:18,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:28:18,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:28:18,460 INFO L87 Difference]: Start difference. First operand 6682 states and 9167 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:20,211 INFO L93 Difference]: Finished difference Result 19562 states and 26780 transitions. [2023-04-01 06:28:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:28:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 221 [2023-04-01 06:28:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:20,261 INFO L225 Difference]: With dead ends: 19562 [2023-04-01 06:28:20,261 INFO L226 Difference]: Without dead ends: 13026 [2023-04-01 06:28:20,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:20,277 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 1400 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:20,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 1559 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13026 states. [2023-04-01 06:28:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13026 to 13024. [2023-04-01 06:28:21,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13024 states, 13020 states have (on average 1.359831029185868) internal successors, (17705), 13020 states have internal predecessors, (17705), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13024 states to 13024 states and 17708 transitions. [2023-04-01 06:28:21,782 INFO L78 Accepts]: Start accepts. Automaton has 13024 states and 17708 transitions. Word has length 221 [2023-04-01 06:28:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:21,782 INFO L495 AbstractCegarLoop]: Abstraction has 13024 states and 17708 transitions. [2023-04-01 06:28:21,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 13024 states and 17708 transitions. [2023-04-01 06:28:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 06:28:21,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:21,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:21,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:28:21,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:21,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1612663304, now seen corresponding path program 1 times [2023-04-01 06:28:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:21,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581852539] [2023-04-01 06:28:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:21,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:22,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:22,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581852539] [2023-04-01 06:28:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581852539] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:22,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:22,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:28:22,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683769603] [2023-04-01 06:28:22,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:22,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:28:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:28:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:22,040 INFO L87 Difference]: Start difference. First operand 13024 states and 17708 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:24,662 INFO L93 Difference]: Finished difference Result 36987 states and 49957 transitions. [2023-04-01 06:28:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:28:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 223 [2023-04-01 06:28:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:24,719 INFO L225 Difference]: With dead ends: 36987 [2023-04-01 06:28:24,720 INFO L226 Difference]: Without dead ends: 25529 [2023-04-01 06:28:24,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:24,747 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 526 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:24,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1774 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25529 states. [2023-04-01 06:28:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25529 to 25527. [2023-04-01 06:28:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25527 states, 25523 states have (on average 1.3521921404223642) internal successors, (34512), 25523 states have internal predecessors, (34512), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25527 states to 25527 states and 34515 transitions. [2023-04-01 06:28:27,327 INFO L78 Accepts]: Start accepts. Automaton has 25527 states and 34515 transitions. Word has length 223 [2023-04-01 06:28:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:27,327 INFO L495 AbstractCegarLoop]: Abstraction has 25527 states and 34515 transitions. [2023-04-01 06:28:27,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 25527 states and 34515 transitions. [2023-04-01 06:28:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 06:28:27,371 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:27,371 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:27,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:28:27,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:27,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash -716407746, now seen corresponding path program 1 times [2023-04-01 06:28:27,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:27,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033424173] [2023-04-01 06:28:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:27,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:27,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033424173] [2023-04-01 06:28:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033424173] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:27,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:27,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:28:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9667553] [2023-04-01 06:28:27,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:27,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:28:27,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:28:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:27,509 INFO L87 Difference]: Start difference. First operand 25527 states and 34515 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:32,217 INFO L93 Difference]: Finished difference Result 74638 states and 100655 transitions. [2023-04-01 06:28:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:28:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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 223 [2023-04-01 06:28:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:32,454 INFO L225 Difference]: With dead ends: 74638 [2023-04-01 06:28:32,454 INFO L226 Difference]: Without dead ends: 50801 [2023-04-01 06:28:32,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:28:32,513 INFO L413 NwaCegarLoop]: 1221 mSDtfsCounter, 628 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:32,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1841 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50801 states. [2023-04-01 06:28:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50801 to 25560. [2023-04-01 06:28:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25560 states, 25556 states have (on average 1.3517373610893724) internal successors, (34545), 25556 states have internal predecessors, (34545), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25560 states to 25560 states and 34548 transitions. [2023-04-01 06:28:35,789 INFO L78 Accepts]: Start accepts. Automaton has 25560 states and 34548 transitions. Word has length 223 [2023-04-01 06:28:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:35,789 INFO L495 AbstractCegarLoop]: Abstraction has 25560 states and 34548 transitions. [2023-04-01 06:28:35,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25560 states and 34548 transitions. [2023-04-01 06:28:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-01 06:28:35,833 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:35,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:35,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:28:35,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:35,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1049708720, now seen corresponding path program 1 times [2023-04-01 06:28:35,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:35,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649508371] [2023-04-01 06:28:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:35,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:36,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:36,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649508371] [2023-04-01 06:28:36,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649508371] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:36,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:36,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:28:36,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34362353] [2023-04-01 06:28:36,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:36,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:28:36,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:28:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:36,472 INFO L87 Difference]: Start difference. First operand 25560 states and 34548 transitions. Second operand has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:41,819 INFO L93 Difference]: Finished difference Result 73963 states and 99619 transitions. [2023-04-01 06:28:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:28:41,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 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 224 [2023-04-01 06:28:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:41,919 INFO L225 Difference]: With dead ends: 73963 [2023-04-01 06:28:41,919 INFO L226 Difference]: Without dead ends: 48607 [2023-04-01 06:28:41,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:41,982 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 1250 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 2169 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:41,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1250 Valid, 2169 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48607 states. [2023-04-01 06:28:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48607 to 48605. [2023-04-01 06:28:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48605 states, 48601 states have (on average 1.3389024917182775) internal successors, (65072), 48601 states have internal predecessors, (65072), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48605 states to 48605 states and 65075 transitions. [2023-04-01 06:28:47,206 INFO L78 Accepts]: Start accepts. Automaton has 48605 states and 65075 transitions. Word has length 224 [2023-04-01 06:28:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:28:47,206 INFO L495 AbstractCegarLoop]: Abstraction has 48605 states and 65075 transitions. [2023-04-01 06:28:47,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.2) internal successors, (221), 5 states have internal predecessors, (221), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 48605 states and 65075 transitions. [2023-04-01 06:28:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 06:28:47,287 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:28:47,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:28:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:28:47,291 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:28:47,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:28:47,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1524424125, now seen corresponding path program 1 times [2023-04-01 06:28:47,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:28:47,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653380991] [2023-04-01 06:28:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:28:47,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:28:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:28:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:28:47,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:28:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653380991] [2023-04-01 06:28:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653380991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:28:47,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:28:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:28:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584317753] [2023-04-01 06:28:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:28:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:28:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:28:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:28:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:28:47,837 INFO L87 Difference]: Start difference. First operand 48605 states and 65075 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 06:28:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:28:58,464 INFO L93 Difference]: Finished difference Result 141503 states and 188819 transitions. [2023-04-01 06:28:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:28:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 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 225 [2023-04-01 06:28:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:28:58,679 INFO L225 Difference]: With dead ends: 141503 [2023-04-01 06:28:58,680 INFO L226 Difference]: Without dead ends: 95166 [2023-04-01 06:28:58,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:28:58,750 INFO L413 NwaCegarLoop]: 977 mSDtfsCounter, 1411 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:28:58,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 1578 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:28:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95166 states.