/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:34:06,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:34:06,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:34:06,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:34:06,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:34:06,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:34:06,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:34:06,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:34:06,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:34:06,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:34:06,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:34:06,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:34:06,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:34:06,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:34:06,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:34:06,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:34:06,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:34:06,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:34:06,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:34:06,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:34:06,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:34:06,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:34:06,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:34:06,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:34:06,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:34:06,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:34:06,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:34:06,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:34:06,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:34:06,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:34:06,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:34:06,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:34:06,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:34:06,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:34:06,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:34:06,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:34:06,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:34:06,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:34:06,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:34:06,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:34:06,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:34:06,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:34:06,576 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:34:06,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:34:06,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:34:06,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:34:06,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:34:06,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:34:06,577 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:34:06,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:34:06,577 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:34:06,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:34:06,577 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:34:06,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:34:06,578 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:34:06,578 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:34:06,578 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:34:06,578 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:34:06,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:34:06,578 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:34:06,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:34:06,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:34:06,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:34:06,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:34:06,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:34:06,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:34:06,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:34:06,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:34:06,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:34:06,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:34:06,802 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:34:06,803 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:34:06,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:34:07,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:34:08,025 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:34:08,025 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:34:08,043 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05a794dd/0f593b09914e43ce9f031c5afa4e3501/FLAG0292c73a2 [2023-04-01 12:34:08,054 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c05a794dd/0f593b09914e43ce9f031c5afa4e3501 [2023-04-01 12:34:08,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:34:08,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:34:08,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:34:08,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:34:08,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:34:08,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e72777a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08, skipping insertion in model container [2023-04-01 12:34:08,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:34:08,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:34:08,308 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.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2023-04-01 12:34:08,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:34:08,367 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:34:08,420 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.BOUNDED-8.pals.c.v+cfa-reducer.c[12834,12847] [2023-04-01 12:34:08,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:34:08,460 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:34:08,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08 WrapperNode [2023-04-01 12:34:08,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:34:08,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:34:08,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:34:08,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:34:08,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:34:08,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:34:08,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:34:08,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:34:08,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (1/1) ... [2023-04-01 12:34:08,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:34:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:34:08,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:34:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:34:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:34:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:34:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:34:08,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:34:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:34:08,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:34:08,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:34:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:34:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:34:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:34:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:34:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:34:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:34:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:34:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:34:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:34:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:34:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:34:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:34:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:34:08,772 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:34:08,774 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:34:09,542 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:34:09,721 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:34:09,722 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:34:09,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:34:09 BoogieIcfgContainer [2023-04-01 12:34:09,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:34:09,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:34:09,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:34:09,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:34:09,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:34:08" (1/3) ... [2023-04-01 12:34:09,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7f8f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:34:09, skipping insertion in model container [2023-04-01 12:34:09,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:34:08" (2/3) ... [2023-04-01 12:34:09,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7f8f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:34:09, skipping insertion in model container [2023-04-01 12:34:09,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:34:09" (3/3) ... [2023-04-01 12:34:09,733 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 12:34:09,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:34:09,749 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:34:09,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:34:09,810 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;@379033c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:34:09,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:34:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 256 states have (on average 1.6796875) internal successors, (430), 264 states have internal predecessors, (430), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:34:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 12:34:09,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:09,826 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] [2023-04-01 12:34:09,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:09,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1572656626, now seen corresponding path program 1 times [2023-04-01 12:34:09,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:09,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872435814] [2023-04-01 12:34:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:09,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:10,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:10,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872435814] [2023-04-01 12:34:10,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872435814] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:10,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:10,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:10,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37761828] [2023-04-01 12:34:10,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:10,341 INFO L87 Difference]: Start difference. First operand has 269 states, 256 states have (on average 1.6796875) internal successors, (430), 264 states have internal predecessors, (430), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:10,490 INFO L93 Difference]: Finished difference Result 454 states and 709 transitions. [2023-04-01 12:34:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 106 [2023-04-01 12:34:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:10,506 INFO L225 Difference]: With dead ends: 454 [2023-04-01 12:34:10,506 INFO L226 Difference]: Without dead ends: 331 [2023-04-01 12:34:10,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:10,511 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 153 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:10,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 879 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-04-01 12:34:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2023-04-01 12:34:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.4953846153846153) internal successors, (486), 325 states have internal predecessors, (486), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 489 transitions. [2023-04-01 12:34:10,593 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 489 transitions. Word has length 106 [2023-04-01 12:34:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:10,594 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 489 transitions. [2023-04-01 12:34:10,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 489 transitions. [2023-04-01 12:34:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 12:34:10,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:10,602 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] [2023-04-01 12:34:10,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:34:10,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:10,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1114860598, now seen corresponding path program 1 times [2023-04-01 12:34:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:10,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106718912] [2023-04-01 12:34:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:10,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:10,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:10,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106718912] [2023-04-01 12:34:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106718912] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:10,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433837230] [2023-04-01 12:34:10,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:10,858 INFO L87 Difference]: Start difference. First operand 329 states and 489 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:10,964 INFO L93 Difference]: Finished difference Result 581 states and 878 transitions. [2023-04-01 12:34:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 108 [2023-04-01 12:34:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:10,971 INFO L225 Difference]: With dead ends: 581 [2023-04-01 12:34:10,974 INFO L226 Difference]: Without dead ends: 420 [2023-04-01 12:34:10,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:10,981 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 133 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:10,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 650 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-04-01 12:34:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2023-04-01 12:34:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 414 states have (on average 1.5) internal successors, (621), 414 states have internal predecessors, (621), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 624 transitions. [2023-04-01 12:34:11,005 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 624 transitions. Word has length 108 [2023-04-01 12:34:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:11,005 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 624 transitions. [2023-04-01 12:34:11,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 624 transitions. [2023-04-01 12:34:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 12:34:11,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:11,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:34:11,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:34:11,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:11,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -278617123, now seen corresponding path program 1 times [2023-04-01 12:34:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:11,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567375458] [2023-04-01 12:34:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:11,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:11,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567375458] [2023-04-01 12:34:11,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567375458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:11,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:11,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:11,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747032762] [2023-04-01 12:34:11,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:11,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:11,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:11,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:11,163 INFO L87 Difference]: Start difference. First operand 418 states and 624 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:11,245 INFO L93 Difference]: Finished difference Result 863 states and 1307 transitions. [2023-04-01 12:34:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:11,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 111 [2023-04-01 12:34:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:11,249 INFO L225 Difference]: With dead ends: 863 [2023-04-01 12:34:11,249 INFO L226 Difference]: Without dead ends: 615 [2023-04-01 12:34:11,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:11,255 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 132 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:11,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 738 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-01 12:34:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2023-04-01 12:34:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 609 states have (on average 1.5073891625615763) internal successors, (918), 609 states have internal predecessors, (918), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 921 transitions. [2023-04-01 12:34:11,290 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 921 transitions. Word has length 111 [2023-04-01 12:34:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:11,291 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 921 transitions. [2023-04-01 12:34:11,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 921 transitions. [2023-04-01 12:34:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 12:34:11,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:11,293 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] [2023-04-01 12:34:11,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:34:11,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:11,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:11,294 INFO L85 PathProgramCache]: Analyzing trace with hash 603566677, now seen corresponding path program 1 times [2023-04-01 12:34:11,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:11,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770923500] [2023-04-01 12:34:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:11,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:11,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770923500] [2023-04-01 12:34:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770923500] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:11,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:11,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491774483] [2023-04-01 12:34:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:11,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:11,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:11,398 INFO L87 Difference]: Start difference. First operand 613 states and 921 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:11,499 INFO L93 Difference]: Finished difference Result 1322 states and 2009 transitions. [2023-04-01 12:34:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 113 [2023-04-01 12:34:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:11,504 INFO L225 Difference]: With dead ends: 1322 [2023-04-01 12:34:11,504 INFO L226 Difference]: Without dead ends: 879 [2023-04-01 12:34:11,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:11,510 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 131 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:11,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 667 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:34:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2023-04-01 12:34:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 877. [2023-04-01 12:34:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 873 states have (on average 1.5154639175257731) internal successors, (1323), 873 states have internal predecessors, (1323), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1326 transitions. [2023-04-01 12:34:11,549 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1326 transitions. Word has length 113 [2023-04-01 12:34:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:11,549 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1326 transitions. [2023-04-01 12:34:11,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1326 transitions. [2023-04-01 12:34:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 12:34:11,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:11,550 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] [2023-04-01 12:34:11,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:34:11,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:11,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2067325624, now seen corresponding path program 1 times [2023-04-01 12:34:11,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:11,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933427762] [2023-04-01 12:34:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:11,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:11,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933427762] [2023-04-01 12:34:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933427762] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:11,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:11,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:11,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892352318] [2023-04-01 12:34:11,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:11,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:11,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:11,648 INFO L87 Difference]: Start difference. First operand 877 states and 1326 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:11,772 INFO L93 Difference]: Finished difference Result 2102 states and 3197 transitions. [2023-04-01 12:34:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 116 [2023-04-01 12:34:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:11,777 INFO L225 Difference]: With dead ends: 2102 [2023-04-01 12:34:11,777 INFO L226 Difference]: Without dead ends: 1413 [2023-04-01 12:34:11,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:11,779 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 126 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:11,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 711 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:34:11,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2023-04-01 12:34:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1411. [2023-04-01 12:34:11,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1407 states have (on average 1.511727078891258) internal successors, (2127), 1407 states have internal predecessors, (2127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2130 transitions. [2023-04-01 12:34:11,890 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2130 transitions. Word has length 116 [2023-04-01 12:34:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:11,890 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 2130 transitions. [2023-04-01 12:34:11,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2130 transitions. [2023-04-01 12:34:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 12:34:11,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:11,891 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] [2023-04-01 12:34:11,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:34:11,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:11,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -264874686, now seen corresponding path program 1 times [2023-04-01 12:34:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:11,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900204047] [2023-04-01 12:34:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:12,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:12,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900204047] [2023-04-01 12:34:12,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900204047] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:12,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787927431] [2023-04-01 12:34:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:12,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:12,009 INFO L87 Difference]: Start difference. First operand 1411 states and 2130 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:12,180 INFO L93 Difference]: Finished difference Result 3341 states and 5075 transitions. [2023-04-01 12:34:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 118 [2023-04-01 12:34:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:12,187 INFO L225 Difference]: With dead ends: 3341 [2023-04-01 12:34:12,188 INFO L226 Difference]: Without dead ends: 2118 [2023-04-01 12:34:12,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:12,191 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 125 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:12,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 669 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:34:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2023-04-01 12:34:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2116. [2023-04-01 12:34:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2112 states have (on average 1.515625) internal successors, (3201), 2112 states have internal predecessors, (3201), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3204 transitions. [2023-04-01 12:34:12,350 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3204 transitions. Word has length 118 [2023-04-01 12:34:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:12,350 INFO L495 AbstractCegarLoop]: Abstraction has 2116 states and 3204 transitions. [2023-04-01 12:34:12,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3204 transitions. [2023-04-01 12:34:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:34:12,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:12,351 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] [2023-04-01 12:34:12,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:34:12,352 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:12,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1689839177, now seen corresponding path program 1 times [2023-04-01 12:34:12,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793168241] [2023-04-01 12:34:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:12,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:12,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793168241] [2023-04-01 12:34:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793168241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:12,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373376578] [2023-04-01 12:34:12,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:12,450 INFO L87 Difference]: Start difference. First operand 2116 states and 3204 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:12,743 INFO L93 Difference]: Finished difference Result 5477 states and 8291 transitions. [2023-04-01 12:34:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 121 [2023-04-01 12:34:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:12,756 INFO L225 Difference]: With dead ends: 5477 [2023-04-01 12:34:12,756 INFO L226 Difference]: Without dead ends: 3567 [2023-04-01 12:34:12,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:12,762 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 120 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:12,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 684 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2023-04-01 12:34:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3565. [2023-04-01 12:34:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3561 states have (on average 1.5029486099410279) internal successors, (5352), 3561 states have internal predecessors, (5352), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5355 transitions. [2023-04-01 12:34:13,039 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5355 transitions. Word has length 121 [2023-04-01 12:34:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:13,039 INFO L495 AbstractCegarLoop]: Abstraction has 3565 states and 5355 transitions. [2023-04-01 12:34:13,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5355 transitions. [2023-04-01 12:34:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 12:34:13,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:13,041 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] [2023-04-01 12:34:13,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:34:13,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:13,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1173045632, now seen corresponding path program 1 times [2023-04-01 12:34:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944013812] [2023-04-01 12:34:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:13,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:13,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:13,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944013812] [2023-04-01 12:34:13,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944013812] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:13,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:13,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:13,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825929946] [2023-04-01 12:34:13,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:13,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:13,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:13,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:13,144 INFO L87 Difference]: Start difference. First operand 3565 states and 5355 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:13,567 INFO L93 Difference]: Finished difference Result 8852 states and 13349 transitions. [2023-04-01 12:34:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-01 12:34:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:13,584 INFO L225 Difference]: With dead ends: 8852 [2023-04-01 12:34:13,584 INFO L226 Difference]: Without dead ends: 5493 [2023-04-01 12:34:13,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:13,590 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 119 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:13,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 671 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:34:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2023-04-01 12:34:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 5491. [2023-04-01 12:34:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5487 states have (on average 1.505194095133953) internal successors, (8259), 5487 states have internal predecessors, (8259), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 8262 transitions. [2023-04-01 12:34:13,920 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 8262 transitions. Word has length 123 [2023-04-01 12:34:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:13,920 INFO L495 AbstractCegarLoop]: Abstraction has 5491 states and 8262 transitions. [2023-04-01 12:34:13,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 8262 transitions. [2023-04-01 12:34:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 12:34:13,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:13,921 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] [2023-04-01 12:34:13,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:34:13,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:13,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2116536961, now seen corresponding path program 1 times [2023-04-01 12:34:13,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:13,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584975095] [2023-04-01 12:34:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:13,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:14,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584975095] [2023-04-01 12:34:14,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584975095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:14,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:14,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:34:14,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855945390] [2023-04-01 12:34:14,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:14,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:34:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:14,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:34:14,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:34:14,082 INFO L87 Difference]: Start difference. First operand 5491 states and 8262 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:14,893 INFO L93 Difference]: Finished difference Result 13735 states and 20722 transitions. [2023-04-01 12:34:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:34:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 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 126 [2023-04-01 12:34:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:14,922 INFO L225 Difference]: With dead ends: 13735 [2023-04-01 12:34:14,922 INFO L226 Difference]: Without dead ends: 8414 [2023-04-01 12:34:14,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:34:14,933 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 1011 mSDsluCounter, 2757 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 3119 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:14,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 3119 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:34:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2023-04-01 12:34:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 8357. [2023-04-01 12:34:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8353 states have (on average 1.5091583862085478) internal successors, (12606), 8353 states have internal predecessors, (12606), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 12609 transitions. [2023-04-01 12:34:15,495 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 12609 transitions. Word has length 126 [2023-04-01 12:34:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:15,495 INFO L495 AbstractCegarLoop]: Abstraction has 8357 states and 12609 transitions. [2023-04-01 12:34:15,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 12609 transitions. [2023-04-01 12:34:15,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 12:34:15,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:15,497 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] [2023-04-01 12:34:15,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:34:15,497 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:15,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1254304644, now seen corresponding path program 1 times [2023-04-01 12:34:15,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180962427] [2023-04-01 12:34:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:15,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:15,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:15,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180962427] [2023-04-01 12:34:15,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180962427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:15,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:34:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166925368] [2023-04-01 12:34:15,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:34:15,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:34:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:34:15,594 INFO L87 Difference]: Start difference. First operand 8357 states and 12609 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:16,119 INFO L93 Difference]: Finished difference Result 16492 states and 24896 transitions. [2023-04-01 12:34:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:34:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 127 [2023-04-01 12:34:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:16,157 INFO L225 Difference]: With dead ends: 16492 [2023-04-01 12:34:16,158 INFO L226 Difference]: Without dead ends: 8359 [2023-04-01 12:34:16,174 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 12:34:16,175 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 246 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:16,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1007 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8359 states. [2023-04-01 12:34:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8359 to 8350. [2023-04-01 12:34:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8350 states, 8346 states have (on average 1.5055116223340523) internal successors, (12565), 8346 states have internal predecessors, (12565), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 12568 transitions. [2023-04-01 12:34:16,822 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 12568 transitions. Word has length 127 [2023-04-01 12:34:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:16,822 INFO L495 AbstractCegarLoop]: Abstraction has 8350 states and 12568 transitions. [2023-04-01 12:34:16,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 12568 transitions. [2023-04-01 12:34:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 12:34:16,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:16,824 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] [2023-04-01 12:34:16,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:34:16,824 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:16,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -517340038, now seen corresponding path program 1 times [2023-04-01 12:34:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:16,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451249167] [2023-04-01 12:34:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:17,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:17,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451249167] [2023-04-01 12:34:17,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451249167] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:17,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:17,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:34:17,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669555493] [2023-04-01 12:34:17,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:17,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:34:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:34:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:34:17,213 INFO L87 Difference]: Start difference. First operand 8350 states and 12568 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:18,097 INFO L93 Difference]: Finished difference Result 13438 states and 20024 transitions. [2023-04-01 12:34:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:34:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 136 [2023-04-01 12:34:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:18,130 INFO L225 Difference]: With dead ends: 13438 [2023-04-01 12:34:18,130 INFO L226 Difference]: Without dead ends: 13436 [2023-04-01 12:34:18,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:34:18,137 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 255 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:18,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1642 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2023-04-01 12:34:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 8474. [2023-04-01 12:34:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8474 states, 8470 states have (on average 1.4894923258559623) internal successors, (12616), 8470 states have internal predecessors, (12616), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8474 states to 8474 states and 12619 transitions. [2023-04-01 12:34:18,784 INFO L78 Accepts]: Start accepts. Automaton has 8474 states and 12619 transitions. Word has length 136 [2023-04-01 12:34:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:18,784 INFO L495 AbstractCegarLoop]: Abstraction has 8474 states and 12619 transitions. [2023-04-01 12:34:18,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 8474 states and 12619 transitions. [2023-04-01 12:34:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 12:34:18,786 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:18,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:34:18,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:34:18,786 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:18,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash 581355926, now seen corresponding path program 1 times [2023-04-01 12:34:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:18,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153627670] [2023-04-01 12:34:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:18,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:34:20,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153627670] [2023-04-01 12:34:20,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153627670] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:34:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724232664] [2023-04-01 12:34:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:20,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:34:20,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:34:20,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:34:20,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:34:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:21,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 12:34:21,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:34:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:34:21,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:34:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724232664] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:21,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:34:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 12:34:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095251943] [2023-04-01 12:34:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:34:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:34:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:34:21,410 INFO L87 Difference]: Start difference. First operand 8474 states and 12619 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:22,974 INFO L93 Difference]: Finished difference Result 25021 states and 37255 transitions. [2023-04-01 12:34:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:34:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 145 [2023-04-01 12:34:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:23,014 INFO L225 Difference]: With dead ends: 25021 [2023-04-01 12:34:23,015 INFO L226 Difference]: Without dead ends: 16570 [2023-04-01 12:34:23,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:34:23,032 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 856 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:23,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 774 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2023-04-01 12:34:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 16568. [2023-04-01 12:34:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16568 states, 16564 states have (on average 1.483578845689447) internal successors, (24574), 16564 states have internal predecessors, (24574), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16568 states to 16568 states and 24577 transitions. [2023-04-01 12:34:24,328 INFO L78 Accepts]: Start accepts. Automaton has 16568 states and 24577 transitions. Word has length 145 [2023-04-01 12:34:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:24,328 INFO L495 AbstractCegarLoop]: Abstraction has 16568 states and 24577 transitions. [2023-04-01 12:34:24,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16568 states and 24577 transitions. [2023-04-01 12:34:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 12:34:24,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:24,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:34:24,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 12:34:24,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 12:34:24,537 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:24,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash 38511926, now seen corresponding path program 1 times [2023-04-01 12:34:24,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:24,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365957089] [2023-04-01 12:34:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 12:34:24,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:24,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365957089] [2023-04-01 12:34:24,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365957089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:24,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:24,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:24,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757905604] [2023-04-01 12:34:24,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:24,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:24,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:24,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:24,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:24,629 INFO L87 Difference]: Start difference. First operand 16568 states and 24577 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:27,504 INFO L93 Difference]: Finished difference Result 48646 states and 72135 transitions. [2023-04-01 12:34:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 147 [2023-04-01 12:34:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:27,579 INFO L225 Difference]: With dead ends: 48646 [2023-04-01 12:34:27,579 INFO L226 Difference]: Without dead ends: 32197 [2023-04-01 12:34:27,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:27,611 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 241 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:27,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 980 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32197 states. [2023-04-01 12:34:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32197 to 32195. [2023-04-01 12:34:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32195 states, 32191 states have (on average 1.476126867758069) internal successors, (47518), 32191 states have internal predecessors, (47518), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32195 states to 32195 states and 47521 transitions. [2023-04-01 12:34:30,489 INFO L78 Accepts]: Start accepts. Automaton has 32195 states and 47521 transitions. Word has length 147 [2023-04-01 12:34:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:30,489 INFO L495 AbstractCegarLoop]: Abstraction has 32195 states and 47521 transitions. [2023-04-01 12:34:30,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 32195 states and 47521 transitions. [2023-04-01 12:34:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 12:34:30,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:30,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:34:30,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:34:30,492 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:30,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1408716931, now seen corresponding path program 1 times [2023-04-01 12:34:30,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:30,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805895227] [2023-04-01 12:34:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:30,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 12:34:30,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:30,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805895227] [2023-04-01 12:34:30,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805895227] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:30,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:34:30,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:34:30,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169571971] [2023-04-01 12:34:30,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:30,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:34:30,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:34:30,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:30,562 INFO L87 Difference]: Start difference. First operand 32195 states and 47521 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:36,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:36,318 INFO L93 Difference]: Finished difference Result 96467 states and 142381 transitions. [2023-04-01 12:34:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:34:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 147 [2023-04-01 12:34:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:36,488 INFO L225 Difference]: With dead ends: 96467 [2023-04-01 12:34:36,488 INFO L226 Difference]: Without dead ends: 64319 [2023-04-01 12:34:36,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:34:36,548 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 339 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:36,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 687 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:34:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64319 states. [2023-04-01 12:34:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64319 to 32207. [2023-04-01 12:34:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32207 states, 32203 states have (on average 1.476011551718784) internal successors, (47532), 32203 states have internal predecessors, (47532), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32207 states to 32207 states and 47535 transitions. [2023-04-01 12:34:40,920 INFO L78 Accepts]: Start accepts. Automaton has 32207 states and 47535 transitions. Word has length 147 [2023-04-01 12:34:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:34:40,921 INFO L495 AbstractCegarLoop]: Abstraction has 32207 states and 47535 transitions. [2023-04-01 12:34:40,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32207 states and 47535 transitions. [2023-04-01 12:34:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 12:34:40,924 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:34:40,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:34:40,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:34:40,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:34:40,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:34:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1506358685, now seen corresponding path program 1 times [2023-04-01 12:34:40,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:34:40,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954942805] [2023-04-01 12:34:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:40,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:34:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:34:47,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:34:47,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954942805] [2023-04-01 12:34:47,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954942805] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:34:47,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385563313] [2023-04-01 12:34:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:34:47,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:34:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:34:47,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:34:47,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 12:34:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:34:47,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 12:34:47,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:34:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:34:47,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 12:34:47,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385563313] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:34:47,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 12:34:47,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-04-01 12:34:47,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043447957] [2023-04-01 12:34:47,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:34:47,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:34:47,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:34:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:34:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-04-01 12:34:47,593 INFO L87 Difference]: Start difference. First operand 32207 states and 47535 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:34:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:34:54,819 INFO L93 Difference]: Finished difference Result 95234 states and 140515 transitions. [2023-04-01 12:34:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:34:54,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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 148 [2023-04-01 12:34:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:34:54,943 INFO L225 Difference]: With dead ends: 95234 [2023-04-01 12:34:54,943 INFO L226 Difference]: Without dead ends: 63166 [2023-04-01 12:34:54,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:34:54,994 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 787 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:34:54,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 719 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:34:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63166 states. [2023-04-01 12:35:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63166 to 63164. [2023-04-01 12:35:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63164 states, 63160 states have (on average 1.4709943001899937) internal successors, (92908), 63160 states have internal predecessors, (92908), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63164 states to 63164 states and 92911 transitions. [2023-04-01 12:35:02,752 INFO L78 Accepts]: Start accepts. Automaton has 63164 states and 92911 transitions. Word has length 148 [2023-04-01 12:35:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:35:02,752 INFO L495 AbstractCegarLoop]: Abstraction has 63164 states and 92911 transitions. [2023-04-01 12:35:02,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:35:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 63164 states and 92911 transitions. [2023-04-01 12:35:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 12:35:02,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:35:02,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:35:02,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 12:35:02,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 12:35:02,958 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:35:02,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:35:02,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1976979052, now seen corresponding path program 1 times [2023-04-01 12:35:02,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:35:02,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760253296] [2023-04-01 12:35:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:35:02,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:35:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:35:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 12:35:03,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:35:03,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760253296] [2023-04-01 12:35:03,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760253296] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:35:03,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:35:03,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:35:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705725052] [2023-04-01 12:35:03,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:35:03,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:35:03,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:35:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:35:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:35:03,059 INFO L87 Difference]: Start difference. First operand 63164 states and 92911 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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)