/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:29:04,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:29:04,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:29:04,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:29:04,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:29:04,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:29:04,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:29:04,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:29:04,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:29:04,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:29:04,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:29:04,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:29:04,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:29:04,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:29:04,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:29:04,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:29:04,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:29:04,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:29:04,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:29:04,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:29:04,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:29:04,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:29:04,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:29:04,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:29:04,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:29:04,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:29:04,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:29:04,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:29:04,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:29:04,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:29:04,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:29:04,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:29:04,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:29:04,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:29:04,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:29:04,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:29:04,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:29:04,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:29:04,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:29:04,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:29:04,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:29:04,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:29:04,579 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:29:04,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:29:04,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:29:04,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:29:04,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:29:04,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:29:04,581 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:29:04,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:29:04,582 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:29:04,582 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:29:04,583 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:29:04,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:29:04,583 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:29:04,583 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:29:04,583 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:29:04,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:29:04,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:29:04,583 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:29:04,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:29:04,584 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:29:04,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:29:04,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:29:04,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:29:04,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:29:04,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:29:04,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:29:04,585 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:29:04,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:29:04,585 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:29:04,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:29:04,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:29:04,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:29:04,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:29:04,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:29:04,586 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:29:04,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:29:04,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:29:04,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:29:04,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:29:04,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:29:04,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:29:04,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:29:04,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:29:04,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:29:04,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:29:04,848 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:29:04,848 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:29:04,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 06:29:06,002 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:29:06,257 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:29:06,258 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 06:29:06,275 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dae351e15/37a0c0f00db04ec7ad7fcd31c2618f34/FLAG4f6cb6048 [2023-04-01 06:29:06,287 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dae351e15/37a0c0f00db04ec7ad7fcd31c2618f34 [2023-04-01 06:29:06,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:29:06,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:29:06,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:29:06,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:29:06,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:29:06,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1f7df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06, skipping insertion in model container [2023-04-01 06:29:06,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:29:06,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:29:06,621 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.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12832,12845] [2023-04-01 06:29:06,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:29:06,711 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:29:06,787 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.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12832,12845] [2023-04-01 06:29:06,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:29:06,857 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:29:06,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06 WrapperNode [2023-04-01 06:29:06,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:29:06,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:29:06,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:29:06,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:29:06,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:06,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:07,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:07,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:29:07,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:29:07,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:29:07,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:29:07,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (1/1) ... [2023-04-01 06:29:07,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:29:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:29:07,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:29:07,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:29:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:29:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:29:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:29:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:29:07,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:29:07,090 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:29:07,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:29:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:29:07,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:29:07,357 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:29:07,359 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:29:08,197 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:29:08,429 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:29:08,429 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:29:08,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:29:08 BoogieIcfgContainer [2023-04-01 06:29:08,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:29:08,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:29:08,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:29:08,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:29:08,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:29:06" (1/3) ... [2023-04-01 06:29:08,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa031e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:29:08, skipping insertion in model container [2023-04-01 06:29:08,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:29:06" (2/3) ... [2023-04-01 06:29:08,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa031e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:29:08, skipping insertion in model container [2023-04-01 06:29:08,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:29:08" (3/3) ... [2023-04-01 06:29:08,441 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2023-04-01 06:29:08,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:29:08,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:29:08,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:29:08,503 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;@4941805d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:29:08,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:29:08,513 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 06:29:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 06:29:08,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:08,534 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 06:29:08,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:08,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1572656626, now seen corresponding path program 1 times [2023-04-01 06:29:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:08,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720016142] [2023-04-01 06:29:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:08,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:09,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720016142] [2023-04-01 06:29:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720016142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460740651] [2023-04-01 06:29:09,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:09,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:09,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:09,211 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 06:29:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:09,405 INFO L93 Difference]: Finished difference Result 454 states and 709 transitions. [2023-04-01 06:29:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:09,408 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 06:29:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:09,418 INFO L225 Difference]: With dead ends: 454 [2023-04-01 06:29:09,418 INFO L226 Difference]: Without dead ends: 331 [2023-04-01 06:29:09,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:09,423 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 06:29:09,427 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 06:29:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-04-01 06:29:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2023-04-01 06:29:09,517 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 06:29:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 489 transitions. [2023-04-01 06:29:09,521 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 489 transitions. Word has length 106 [2023-04-01 06:29:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:09,522 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 489 transitions. [2023-04-01 06:29:09,522 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 06:29:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 489 transitions. [2023-04-01 06:29:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-01 06:29:09,525 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:09,525 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 06:29:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:29:09,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:09,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1114860598, now seen corresponding path program 1 times [2023-04-01 06:29:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:09,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623250752] [2023-04-01 06:29:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:09,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:09,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623250752] [2023-04-01 06:29:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623250752] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:09,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:09,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299187923] [2023-04-01 06:29:09,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:09,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:09,785 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 06:29:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:09,928 INFO L93 Difference]: Finished difference Result 581 states and 878 transitions. [2023-04-01 06:29:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:09,929 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 06:29:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:09,936 INFO L225 Difference]: With dead ends: 581 [2023-04-01 06:29:09,941 INFO L226 Difference]: Without dead ends: 420 [2023-04-01 06:29:09,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:09,946 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 06:29:09,946 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 06:29:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-04-01 06:29:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 418. [2023-04-01 06:29:09,971 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 06:29:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 624 transitions. [2023-04-01 06:29:09,975 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 624 transitions. Word has length 108 [2023-04-01 06:29:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:09,976 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 624 transitions. [2023-04-01 06:29:09,977 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 06:29:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 624 transitions. [2023-04-01 06:29:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-04-01 06:29:09,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:09,980 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 06:29:09,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:29:09,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:09,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash -278617123, now seen corresponding path program 1 times [2023-04-01 06:29:09,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:09,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494096170] [2023-04-01 06:29:09,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:09,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:10,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:10,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494096170] [2023-04-01 06:29:10,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494096170] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:10,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:10,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288803447] [2023-04-01 06:29:10,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:10,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:10,172 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 06:29:10,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:10,306 INFO L93 Difference]: Finished difference Result 863 states and 1307 transitions. [2023-04-01 06:29:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:10,306 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 06:29:10,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:10,309 INFO L225 Difference]: With dead ends: 863 [2023-04-01 06:29:10,309 INFO L226 Difference]: Without dead ends: 615 [2023-04-01 06:29:10,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:10,311 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 132 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 06:29:10,311 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 06:29:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2023-04-01 06:29:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 613. [2023-04-01 06:29:10,354 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 06:29:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 921 transitions. [2023-04-01 06:29:10,357 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 921 transitions. Word has length 111 [2023-04-01 06:29:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:10,358 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 921 transitions. [2023-04-01 06:29:10,358 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 06:29:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 921 transitions. [2023-04-01 06:29:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-01 06:29:10,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:10,359 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 06:29:10,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:29:10,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:10,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash 603566677, now seen corresponding path program 1 times [2023-04-01 06:29:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:10,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106232208] [2023-04-01 06:29:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:10,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:10,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106232208] [2023-04-01 06:29:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106232208] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:10,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748508446] [2023-04-01 06:29:10,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:10,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:10,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:10,494 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 06:29:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:10,605 INFO L93 Difference]: Finished difference Result 1322 states and 2009 transitions. [2023-04-01 06:29:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:10,606 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 06:29:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:10,610 INFO L225 Difference]: With dead ends: 1322 [2023-04-01 06:29:10,610 INFO L226 Difference]: Without dead ends: 879 [2023-04-01 06:29:10,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:10,612 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:10,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 667 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:29:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2023-04-01 06:29:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 877. [2023-04-01 06:29:10,656 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 06:29:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1326 transitions. [2023-04-01 06:29:10,659 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1326 transitions. Word has length 113 [2023-04-01 06:29:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:10,660 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1326 transitions. [2023-04-01 06:29:10,660 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 06:29:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1326 transitions. [2023-04-01 06:29:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-04-01 06:29:10,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:10,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:10,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:29:10,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:10,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2067325624, now seen corresponding path program 1 times [2023-04-01 06:29:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016068605] [2023-04-01 06:29:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:10,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:10,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:10,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016068605] [2023-04-01 06:29:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016068605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:10,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:10,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907933137] [2023-04-01 06:29:10,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:10,849 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 06:29:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:11,060 INFO L93 Difference]: Finished difference Result 2102 states and 3197 transitions. [2023-04-01 06:29:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:11,061 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 06:29:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:11,067 INFO L225 Difference]: With dead ends: 2102 [2023-04-01 06:29:11,067 INFO L226 Difference]: Without dead ends: 1413 [2023-04-01 06:29:11,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:11,070 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 126 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:11,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 711 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:29:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2023-04-01 06:29:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1411. [2023-04-01 06:29:11,194 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 06:29:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2130 transitions. [2023-04-01 06:29:11,200 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2130 transitions. Word has length 116 [2023-04-01 06:29:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:11,200 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 2130 transitions. [2023-04-01 06:29:11,200 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 06:29:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2130 transitions. [2023-04-01 06:29:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 06:29:11,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:11,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:29:11,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:29:11,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:11,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash -264874686, now seen corresponding path program 1 times [2023-04-01 06:29:11,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:11,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865041482] [2023-04-01 06:29:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:11,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:11,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:11,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865041482] [2023-04-01 06:29:11,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865041482] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:11,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:11,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:11,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927477187] [2023-04-01 06:29:11,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:11,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:11,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:11,369 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 06:29:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:11,647 INFO L93 Difference]: Finished difference Result 3341 states and 5075 transitions. [2023-04-01 06:29:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:11,648 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 06:29:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:11,656 INFO L225 Difference]: With dead ends: 3341 [2023-04-01 06:29:11,656 INFO L226 Difference]: Without dead ends: 2118 [2023-04-01 06:29:11,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:11,660 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:11,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 669 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:29:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2023-04-01 06:29:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2116. [2023-04-01 06:29:11,856 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 06:29:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3204 transitions. [2023-04-01 06:29:11,866 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3204 transitions. Word has length 118 [2023-04-01 06:29:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:11,866 INFO L495 AbstractCegarLoop]: Abstraction has 2116 states and 3204 transitions. [2023-04-01 06:29:11,866 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 06:29:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3204 transitions. [2023-04-01 06:29:11,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 06:29:11,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:11,868 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 06:29:11,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:29:11,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:11,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1689839177, now seen corresponding path program 1 times [2023-04-01 06:29:11,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:11,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972973283] [2023-04-01 06:29:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:11,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:11,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:11,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972973283] [2023-04-01 06:29:11,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972973283] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:11,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704334171] [2023-04-01 06:29:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:11,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:11,990 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 06:29:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:12,403 INFO L93 Difference]: Finished difference Result 5477 states and 8291 transitions. [2023-04-01 06:29:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:12,403 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 06:29:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:12,416 INFO L225 Difference]: With dead ends: 5477 [2023-04-01 06:29:12,417 INFO L226 Difference]: Without dead ends: 3567 [2023-04-01 06:29:12,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:12,422 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 120 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 06:29:12,422 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 06:29:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2023-04-01 06:29:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3565. [2023-04-01 06:29:12,789 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 06:29:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 5355 transitions. [2023-04-01 06:29:12,805 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 5355 transitions. Word has length 121 [2023-04-01 06:29:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:12,805 INFO L495 AbstractCegarLoop]: Abstraction has 3565 states and 5355 transitions. [2023-04-01 06:29:12,805 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 06:29:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 5355 transitions. [2023-04-01 06:29:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 06:29:12,806 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:12,807 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 06:29:12,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 06:29:12,807 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:12,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1173045632, now seen corresponding path program 1 times [2023-04-01 06:29:12,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:12,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316007228] [2023-04-01 06:29:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:12,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:12,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:12,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316007228] [2023-04-01 06:29:12,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316007228] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:12,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:12,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:12,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981276304] [2023-04-01 06:29:12,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:12,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:12,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:12,932 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 06:29:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:13,528 INFO L93 Difference]: Finished difference Result 8852 states and 13349 transitions. [2023-04-01 06:29:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:13,529 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 06:29:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:13,550 INFO L225 Difference]: With dead ends: 8852 [2023-04-01 06:29:13,550 INFO L226 Difference]: Without dead ends: 5493 [2023-04-01 06:29:13,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:13,561 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 119 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:13,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 671 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:29:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2023-04-01 06:29:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 5491. [2023-04-01 06:29:14,025 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 06:29:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 8262 transitions. [2023-04-01 06:29:14,045 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 8262 transitions. Word has length 123 [2023-04-01 06:29:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:14,046 INFO L495 AbstractCegarLoop]: Abstraction has 5491 states and 8262 transitions. [2023-04-01 06:29:14,046 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 06:29:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 8262 transitions. [2023-04-01 06:29:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 06:29:14,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:14,047 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 06:29:14,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 06:29:14,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:14,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2116536961, now seen corresponding path program 1 times [2023-04-01 06:29:14,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:14,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905840010] [2023-04-01 06:29:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:14,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905840010] [2023-04-01 06:29:14,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905840010] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:14,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:14,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 06:29:14,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279627028] [2023-04-01 06:29:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:14,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 06:29:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 06:29:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:29:14,256 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 06:29:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:15,319 INFO L93 Difference]: Finished difference Result 13735 states and 20722 transitions. [2023-04-01 06:29:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 06:29:15,319 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 06:29:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:15,383 INFO L225 Difference]: With dead ends: 13735 [2023-04-01 06:29:15,383 INFO L226 Difference]: Without dead ends: 8414 [2023-04-01 06:29:15,395 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 06:29:15,396 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 06:29:15,396 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 06:29:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2023-04-01 06:29:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 8357. [2023-04-01 06:29:16,281 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 06:29:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 12609 transitions. [2023-04-01 06:29:16,318 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 12609 transitions. Word has length 126 [2023-04-01 06:29:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:16,318 INFO L495 AbstractCegarLoop]: Abstraction has 8357 states and 12609 transitions. [2023-04-01 06:29:16,319 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 06:29:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 12609 transitions. [2023-04-01 06:29:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-01 06:29:16,321 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:16,321 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 06:29:16,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 06:29:16,321 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:16,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1254304644, now seen corresponding path program 1 times [2023-04-01 06:29:16,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:16,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848471604] [2023-04-01 06:29:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:16,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:16,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:16,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848471604] [2023-04-01 06:29:16,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848471604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:16,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:16,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 06:29:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922302826] [2023-04-01 06:29:16,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:16,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:29:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:29:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 06:29:16,455 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 06:29:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:17,308 INFO L93 Difference]: Finished difference Result 16492 states and 24896 transitions. [2023-04-01 06:29:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:29:17,308 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 06:29:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:17,347 INFO L225 Difference]: With dead ends: 16492 [2023-04-01 06:29:17,348 INFO L226 Difference]: Without dead ends: 8359 [2023-04-01 06:29:17,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:29:17,366 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 06:29:17,366 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 06:29:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8359 states. [2023-04-01 06:29:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8359 to 8350. [2023-04-01 06:29:18,196 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 06:29:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 12568 transitions. [2023-04-01 06:29:18,222 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 12568 transitions. Word has length 127 [2023-04-01 06:29:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:18,222 INFO L495 AbstractCegarLoop]: Abstraction has 8350 states and 12568 transitions. [2023-04-01 06:29:18,223 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 06:29:18,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 12568 transitions. [2023-04-01 06:29:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-01 06:29:18,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:18,224 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 06:29:18,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 06:29:18,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:18,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:18,225 INFO L85 PathProgramCache]: Analyzing trace with hash -517340038, now seen corresponding path program 1 times [2023-04-01 06:29:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:18,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33301983] [2023-04-01 06:29:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:18,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:29:18,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:18,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33301983] [2023-04-01 06:29:18,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33301983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:18,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:18,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:29:18,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680614711] [2023-04-01 06:29:18,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:18,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:29:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:29:18,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:29:18,744 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 06:29:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:20,029 INFO L93 Difference]: Finished difference Result 13438 states and 20024 transitions. [2023-04-01 06:29:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 06:29:20,030 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 06:29:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:20,072 INFO L225 Difference]: With dead ends: 13438 [2023-04-01 06:29:20,072 INFO L226 Difference]: Without dead ends: 13436 [2023-04-01 06:29:20,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:29:20,082 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 06:29:20,083 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 06:29:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2023-04-01 06:29:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 8474. [2023-04-01 06:29:21,044 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 06:29:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8474 states to 8474 states and 12619 transitions. [2023-04-01 06:29:21,069 INFO L78 Accepts]: Start accepts. Automaton has 8474 states and 12619 transitions. Word has length 136 [2023-04-01 06:29:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:21,070 INFO L495 AbstractCegarLoop]: Abstraction has 8474 states and 12619 transitions. [2023-04-01 06:29:21,070 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 06:29:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 8474 states and 12619 transitions. [2023-04-01 06:29:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 06:29:21,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:21,072 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 06:29:21,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 06:29:21,072 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:21,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 581355926, now seen corresponding path program 1 times [2023-04-01 06:29:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:21,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118483753] [2023-04-01 06:29:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:23,843 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 06:29:23,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118483753] [2023-04-01 06:29:23,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118483753] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:29:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804976396] [2023-04-01 06:29:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:23,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:29:23,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:29:23,850 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 06:29:23,851 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 06:29:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:24,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 06:29:24,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:29:24,383 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 06:29:24,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:29:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804976396] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:24,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:29:24,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 06:29:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724140437] [2023-04-01 06:29:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:29:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:29:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:29:24,385 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 06:29:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:26,189 INFO L93 Difference]: Finished difference Result 25021 states and 37255 transitions. [2023-04-01 06:29:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:29:26,190 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 06:29:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:26,238 INFO L225 Difference]: With dead ends: 25021 [2023-04-01 06:29:26,238 INFO L226 Difference]: Without dead ends: 16570 [2023-04-01 06:29:26,263 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 06:29:26,264 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 06:29:26,264 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 06:29:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2023-04-01 06:29:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 16568. [2023-04-01 06:29:27,643 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 06:29:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16568 states to 16568 states and 24577 transitions. [2023-04-01 06:29:27,697 INFO L78 Accepts]: Start accepts. Automaton has 16568 states and 24577 transitions. Word has length 145 [2023-04-01 06:29:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:27,697 INFO L495 AbstractCegarLoop]: Abstraction has 16568 states and 24577 transitions. [2023-04-01 06:29:27,698 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 06:29:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 16568 states and 24577 transitions. [2023-04-01 06:29:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 06:29:27,700 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:27,700 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 06:29:27,712 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 06:29:27,908 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 06:29:27,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:27,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash 38511926, now seen corresponding path program 1 times [2023-04-01 06:29:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:27,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065849155] [2023-04-01 06:29:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:28,033 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 06:29:28,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:28,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065849155] [2023-04-01 06:29:28,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065849155] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:28,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:28,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:28,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772877645] [2023-04-01 06:29:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:28,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:28,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:28,036 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 06:29:30,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:30,947 INFO L93 Difference]: Finished difference Result 48646 states and 72135 transitions. [2023-04-01 06:29:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:30,948 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 06:29:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:31,036 INFO L225 Difference]: With dead ends: 48646 [2023-04-01 06:29:31,036 INFO L226 Difference]: Without dead ends: 32197 [2023-04-01 06:29:31,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:31,076 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 06:29:31,076 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 06:29:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32197 states. [2023-04-01 06:29:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32197 to 32195. [2023-04-01 06:29:34,451 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 06:29:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32195 states to 32195 states and 47521 transitions. [2023-04-01 06:29:34,566 INFO L78 Accepts]: Start accepts. Automaton has 32195 states and 47521 transitions. Word has length 147 [2023-04-01 06:29:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:34,567 INFO L495 AbstractCegarLoop]: Abstraction has 32195 states and 47521 transitions. [2023-04-01 06:29:34,567 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 06:29:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 32195 states and 47521 transitions. [2023-04-01 06:29:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-01 06:29:34,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:34,570 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 06:29:34,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 06:29:34,571 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:34,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:34,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1408716931, now seen corresponding path program 1 times [2023-04-01 06:29:34,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:34,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008661824] [2023-04-01 06:29:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:34,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:34,653 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 06:29:34,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008661824] [2023-04-01 06:29:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008661824] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:34,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:29:34,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:29:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729568418] [2023-04-01 06:29:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:29:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:29:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:29:34,656 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 06:29:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:41,625 INFO L93 Difference]: Finished difference Result 96467 states and 142381 transitions. [2023-04-01 06:29:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:29:41,626 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 06:29:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:41,906 INFO L225 Difference]: With dead ends: 96467 [2023-04-01 06:29:41,907 INFO L226 Difference]: Without dead ends: 64319 [2023-04-01 06:29:41,979 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 06:29:41,979 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 339 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:29:41,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 687 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:29:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64319 states. [2023-04-01 06:29:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64319 to 32207. [2023-04-01 06:29:46,437 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 06:29:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32207 states to 32207 states and 47535 transitions. [2023-04-01 06:29:46,514 INFO L78 Accepts]: Start accepts. Automaton has 32207 states and 47535 transitions. Word has length 147 [2023-04-01 06:29:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:29:46,514 INFO L495 AbstractCegarLoop]: Abstraction has 32207 states and 47535 transitions. [2023-04-01 06:29:46,514 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 06:29:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32207 states and 47535 transitions. [2023-04-01 06:29:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-01 06:29:46,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:29:46,520 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 06:29:46,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 06:29:46,520 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:29:46,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:29:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1506358685, now seen corresponding path program 1 times [2023-04-01 06:29:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:29:46,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866853288] [2023-04-01 06:29:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:29:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:48,415 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 06:29:48,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:29:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866853288] [2023-04-01 06:29:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866853288] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:29:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127549613] [2023-04-01 06:29:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:29:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:29:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:29:48,418 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 06:29:48,420 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 06:29:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:29:48,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 06:29:48,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:29:48,926 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 06:29:48,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:29:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127549613] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:29:48,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:29:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2023-04-01 06:29:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48705622] [2023-04-01 06:29:48,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:29:48,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 06:29:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:29:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 06:29:48,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-04-01 06:29:48,931 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 06:29:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:29:56,948 INFO L93 Difference]: Finished difference Result 95234 states and 140515 transitions. [2023-04-01 06:29:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 06:29:56,949 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 06:29:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:29:57,125 INFO L225 Difference]: With dead ends: 95234 [2023-04-01 06:29:57,125 INFO L226 Difference]: Without dead ends: 63166 [2023-04-01 06:29:57,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-04-01 06:29:57,194 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 06:29:57,194 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 06:29:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63166 states.