/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:21:05,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:21:05,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:21:05,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:21:05,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:21:05,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:21:05,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:21:05,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:21:05,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:21:05,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:21:05,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:21:05,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:21:05,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:21:05,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:21:05,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:21:05,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:21:05,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:21:05,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:21:05,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:21:05,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:21:05,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:21:05,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:21:05,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:21:05,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:21:05,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:21:05,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:21:05,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:21:05,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:21:05,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:21:05,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:21:05,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:21:05,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:21:05,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:21:05,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:21:05,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:21:05,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:21:05,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:21:05,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:21:05,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:21:05,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:21:05,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:21:05,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:21:05,530 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:21:05,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:21:05,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:21:05,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:21:05,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:21:05,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:21:05,532 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:21:05,532 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:21:05,533 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:21:05,533 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:21:05,533 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:21:05,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:21:05,534 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:21:05,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:21:05,534 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:21:05,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:21:05,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:21:05,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:21:05,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:21:05,535 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:21:05,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:21:05,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:21:05,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:21:05,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:21:05,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:21:05,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:21:05,536 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:21:05,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:21:05,536 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:21:05,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:21:05,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:21:05,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:21:05,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:21:05,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:21:05,537 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:21:05,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:21:05,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:21:05,538 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:21:05,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:21:05,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:21:05,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:21:05,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:21:05,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:21:05,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:21:05,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:21:05,782 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:21:05,782 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:21:05,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2023-04-01 12:21:06,953 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:21:07,183 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:21:07,188 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2023-04-01 12:21:07,203 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8244642de/a747e68d7d0442eea3d572b7b2b02d29/FLAGe8e293308 [2023-04-01 12:21:07,216 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8244642de/a747e68d7d0442eea3d572b7b2b02d29 [2023-04-01 12:21:07,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:21:07,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:21:07,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:21:07,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:21:07,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:21:07,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a918911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07, skipping insertion in model container [2023-04-01 12:21:07,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:21:07,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:21:07,539 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/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c[28194,28207] [2023-04-01 12:21:07,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:21:07,563 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:21:07,649 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/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c[28194,28207] [2023-04-01 12:21:07,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:21:07,673 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:21:07,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07 WrapperNode [2023-04-01 12:21:07,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:21:07,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:21:07,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:21:07,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:21:07,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,749 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:21:07,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:21:07,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:21:07,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:21:07,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (1/1) ... [2023-04-01 12:21:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:21:07,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:21:07,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:21:07,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:21:07,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:21:07,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:21:07,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:21:07,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:21:07,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:21:07,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:21:07,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:21:07,901 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 12:21:07,901 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:21:07,901 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:21:07,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:21:07,901 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:21:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:21:07,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:21:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:21:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:21:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:21:07,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:21:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:21:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:21:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:21:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:21:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:21:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:21:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:21:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:21:08,085 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:21:08,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:21:08,999 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:21:09,585 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:21:09,585 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:21:09,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:21:09 BoogieIcfgContainer [2023-04-01 12:21:09,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:21:09,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:21:09,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:21:09,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:21:09,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:21:07" (1/3) ... [2023-04-01 12:21:09,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67eda4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:21:09, skipping insertion in model container [2023-04-01 12:21:09,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:21:07" (2/3) ... [2023-04-01 12:21:09,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67eda4a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:21:09, skipping insertion in model container [2023-04-01 12:21:09,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:21:09" (3/3) ... [2023-04-01 12:21:09,597 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c [2023-04-01 12:21:09,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:21:09,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:21:09,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:21:09,673 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;@7d801ed8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:21:09,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:21:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:21:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 12:21:09,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:09,688 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] [2023-04-01 12:21:09,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:09,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2104542807, now seen corresponding path program 1 times [2023-04-01 12:21:09,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:09,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113798729] [2023-04-01 12:21:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:09,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:15,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:15,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113798729] [2023-04-01 12:21:15,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113798729] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:15,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:15,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:21:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845057483] [2023-04-01 12:21:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:15,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:21:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:21:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:21:15,432 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:17,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:17,562 INFO L93 Difference]: Finished difference Result 282 states and 398 transitions. [2023-04-01 12:21:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:21:17,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 12:21:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:17,582 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:21:17,582 INFO L226 Difference]: Without dead ends: 228 [2023-04-01 12:21:17,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 12:21:17,591 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1937 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:17,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 165 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 12:21:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-01 12:21:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2023-04-01 12:21:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5465116279069768) internal successors, (266), 173 states have internal predecessors, (266), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 12:21:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2023-04-01 12:21:17,678 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 85 [2023-04-01 12:21:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:17,679 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2023-04-01 12:21:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2023-04-01 12:21:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 12:21:17,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:17,689 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] [2023-04-01 12:21:17,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:21:17,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:17,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1205989878, now seen corresponding path program 1 times [2023-04-01 12:21:17,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:17,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238037575] [2023-04-01 12:21:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:20,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:20,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238037575] [2023-04-01 12:21:20,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238037575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:20,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:20,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:20,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164288331] [2023-04-01 12:21:20,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:20,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:20,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:20,395 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:21,568 INFO L93 Difference]: Finished difference Result 281 states and 396 transitions. [2023-04-01 12:21:21,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 12:21:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:21,571 INFO L225 Difference]: With dead ends: 281 [2023-04-01 12:21:21,571 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 12:21:21,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:21:21,573 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 311 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:21,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 106 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 12:21:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2023-04-01 12:21:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2023-04-01 12:21:21,615 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 86 [2023-04-01 12:21:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:21,617 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2023-04-01 12:21:21,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2023-04-01 12:21:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:21:21,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:21,620 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] [2023-04-01 12:21:21,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:21:21,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:21,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:21,621 INFO L85 PathProgramCache]: Analyzing trace with hash 227364256, now seen corresponding path program 1 times [2023-04-01 12:21:21,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:21,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98842401] [2023-04-01 12:21:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:24,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:24,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98842401] [2023-04-01 12:21:24,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98842401] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:24,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:24,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:24,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725049884] [2023-04-01 12:21:24,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:24,067 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:25,266 INFO L93 Difference]: Finished difference Result 275 states and 380 transitions. [2023-04-01 12:21:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 12:21:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:25,271 INFO L225 Difference]: With dead ends: 275 [2023-04-01 12:21:25,271 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 12:21:25,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:21:25,274 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 315 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:25,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 112 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 12:21:25,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2023-04-01 12:21:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-01 12:21:25,303 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-01 12:21:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:25,305 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-01 12:21:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-01 12:21:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 12:21:25,307 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:25,308 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] [2023-04-01 12:21:25,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:21:25,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:25,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1061452447, now seen corresponding path program 1 times [2023-04-01 12:21:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:25,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505096628] [2023-04-01 12:21:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:27,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505096628] [2023-04-01 12:21:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505096628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:27,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:27,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:27,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028679661] [2023-04-01 12:21:27,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:27,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:27,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:27,623 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:28,733 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-01 12:21:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:28,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 12:21:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:28,735 INFO L225 Difference]: With dead ends: 281 [2023-04-01 12:21:28,735 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 12:21:28,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:21:28,737 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 581 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:28,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 102 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 12:21:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-01 12:21:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-01 12:21:28,761 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-01 12:21:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:28,761 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-01 12:21:28,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-01 12:21:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 12:21:28,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:28,762 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] [2023-04-01 12:21:28,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:21:28,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:28,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2039873303, now seen corresponding path program 1 times [2023-04-01 12:21:28,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:28,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645137641] [2023-04-01 12:21:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:30,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:30,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645137641] [2023-04-01 12:21:30,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645137641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:30,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:30,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:30,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026604166] [2023-04-01 12:21:30,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:30,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:30,863 INFO L87 Difference]: Start difference. First operand 202 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:31,971 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-01 12:21:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:31,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 12:21:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:31,973 INFO L225 Difference]: With dead ends: 287 [2023-04-01 12:21:31,974 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 12:21:31,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:21:31,975 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 587 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:31,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 104 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 12:21:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-01 12:21:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-01 12:21:31,997 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-01 12:21:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:31,998 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-01 12:21:31,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-01 12:21:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 12:21:31,999 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:32,000 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] [2023-04-01 12:21:32,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:21:32,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:32,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash 416826577, now seen corresponding path program 1 times [2023-04-01 12:21:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:32,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786829909] [2023-04-01 12:21:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:32,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:35,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:35,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786829909] [2023-04-01 12:21:35,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786829909] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:35,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:35,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:21:35,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31876504] [2023-04-01 12:21:35,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:35,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:21:35,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:35,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:21:35,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:21:35,789 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:37,699 INFO L93 Difference]: Finished difference Result 282 states and 393 transitions. [2023-04-01 12:21:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 12:21:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 12:21:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:37,701 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:21:37,701 INFO L226 Difference]: Without dead ends: 238 [2023-04-01 12:21:37,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 12:21:37,703 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1353 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:37,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 149 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 12:21:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-01 12:21:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 204. [2023-04-01 12:21:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.5114942528735633) internal successors, (263), 175 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2023-04-01 12:21:37,738 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 91 [2023-04-01 12:21:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:37,738 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2023-04-01 12:21:37,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2023-04-01 12:21:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 12:21:37,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:37,740 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] [2023-04-01 12:21:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:21:37,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:37,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash -644118890, now seen corresponding path program 1 times [2023-04-01 12:21:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:37,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709389979] [2023-04-01 12:21:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:38,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:38,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709389979] [2023-04-01 12:21:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709389979] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:38,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:38,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:38,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134909432] [2023-04-01 12:21:38,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:38,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:38,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:38,707 INFO L87 Difference]: Start difference. First operand 204 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:39,655 INFO L93 Difference]: Finished difference Result 279 states and 386 transitions. [2023-04-01 12:21:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:39,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 12:21:39,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:39,661 INFO L225 Difference]: With dead ends: 279 [2023-04-01 12:21:39,661 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 12:21:39,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:21:39,664 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 299 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:39,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 105 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 12:21:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 12:21:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 204. [2023-04-01 12:21:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 175 states have internal predecessors, (259), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2023-04-01 12:21:39,712 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 92 [2023-04-01 12:21:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:39,713 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2023-04-01 12:21:39,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2023-04-01 12:21:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 12:21:39,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:39,714 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] [2023-04-01 12:21:39,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:21:39,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:39,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash 578347644, now seen corresponding path program 1 times [2023-04-01 12:21:39,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:39,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172692442] [2023-04-01 12:21:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:44,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:44,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172692442] [2023-04-01 12:21:44,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172692442] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:44,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:44,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-01 12:21:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265767222] [2023-04-01 12:21:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:44,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 12:21:44,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:44,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 12:21:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-01 12:21:44,551 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:47,706 INFO L93 Difference]: Finished difference Result 292 states and 390 transitions. [2023-04-01 12:21:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 12:21:47,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-01 12:21:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:47,708 INFO L225 Difference]: With dead ends: 292 [2023-04-01 12:21:47,709 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 12:21:47,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=416, Invalid=1390, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 12:21:47,710 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1804 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:47,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 169 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 12:21:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 12:21:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 204. [2023-04-01 12:21:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 175 states have internal predecessors, (258), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2023-04-01 12:21:47,752 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 94 [2023-04-01 12:21:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:47,752 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2023-04-01 12:21:47,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.909090909090909) internal successors, (76), 13 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2023-04-01 12:21:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 12:21:47,753 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:47,754 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] [2023-04-01 12:21:47,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:21:47,754 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:47,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:47,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1956576838, now seen corresponding path program 1 times [2023-04-01 12:21:47,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028294240] [2023-04-01 12:21:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:49,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:49,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028294240] [2023-04-01 12:21:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028294240] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:49,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:49,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 12:21:49,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16746923] [2023-04-01 12:21:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:49,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 12:21:49,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:49,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 12:21:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:21:49,190 INFO L87 Difference]: Start difference. First operand 204 states and 287 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 12:21:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:49,675 INFO L93 Difference]: Finished difference Result 282 states and 388 transitions. [2023-04-01 12:21:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 12:21:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 12:21:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:49,677 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:21:49,677 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 12:21:49,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:21:49,678 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:49,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:21:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 12:21:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-01 12:21:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 12:21:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-01 12:21:49,722 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-01 12:21:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:49,722 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-01 12:21:49,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 12:21:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-01 12:21:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:21:49,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:49,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:21:49,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:21:49,724 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:49,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:49,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1979843270, now seen corresponding path program 1 times [2023-04-01 12:21:49,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:49,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755749554] [2023-04-01 12:21:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:49,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat