/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:06:11,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:06:11,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:06:11,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:06:11,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:06:11,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:06:11,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:06:11,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:06:11,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:06:11,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:06:11,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:06:11,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:06:11,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:06:11,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:06:11,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:06:11,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:06:11,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:06:11,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:06:11,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:06:11,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:06:11,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:06:11,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:06:11,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:06:11,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:06:11,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:06:11,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:06:11,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:06:11,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:06:11,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:06:11,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:06:11,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:06:11,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:06:11,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:06:11,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:06:11,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:06:11,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:06:11,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:06:11,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:06:11,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:06:11,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:06:11,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:06:11,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:06:11,084 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:06:11,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:06:11,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:06:11,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:06:11,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:06:11,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:06:11,086 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:06:11,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:06:11,086 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:06:11,087 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:06:11,087 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:06:11,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:06:11,087 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:06:11,087 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:06:11,087 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:06:11,088 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:06:11,088 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:06:11,088 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:06:11,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:06:11,089 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:06:11,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:06:11,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:06:11,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:06:11,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:06:11,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:06:11,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:06:11,090 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:06:11,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:06:11,090 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:06:11,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:06:11,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:06:11,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:06:11,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:06:11,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:06:11,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:06:11,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:06:11,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:06:11,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:06:11,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:06:11,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:06:11,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:06:11,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:06:11,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:06:11,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:06:11,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:06:11,331 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:06:11,332 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:06:11,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-03 02:06:12,539 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:06:12,798 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:06:12,799 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-03 02:06:12,825 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ec5a0d0c/0ca6b18b7a2a49c88175a094fdf2d0e7/FLAG97690d6fc [2023-04-03 02:06:12,838 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ec5a0d0c/0ca6b18b7a2a49c88175a094fdf2d0e7 [2023-04-03 02:06:12,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:06:12,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:06:12,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:06:12,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:06:12,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:06:12,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:06:12" (1/1) ... [2023-04-03 02:06:12,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a3a7fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:12, skipping insertion in model container [2023-04-03 02:06:12,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:06:12" (1/1) ... [2023-04-03 02:06:12,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:06:12,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:06:13,242 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_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-03 02:06:13,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:06:13,260 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:06:13,396 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_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-03 02:06:13,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:06:13,414 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:06:13,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13 WrapperNode [2023-04-03 02:06:13,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:06:13,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:06:13,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:06:13,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:06:13,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:06:13,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:06:13,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:06:13,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:06:13,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (1/1) ... [2023-04-03 02:06:13,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:06:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:06:13,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:06:13,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 02:06:13,672 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:06:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:06:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:06:13,673 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:06:13,673 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:06:13,674 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:06:13,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:06:13,878 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:06:13,880 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:06:15,214 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:06:16,557 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:06:16,558 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:06:16,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:06:16 BoogieIcfgContainer [2023-04-03 02:06:16,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:06:16,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:06:16,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:06:16,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:06:16,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:06:12" (1/3) ... [2023-04-03 02:06:16,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3592ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:06:16, skipping insertion in model container [2023-04-03 02:06:16,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:06:13" (2/3) ... [2023-04-03 02:06:16,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3592ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:06:16, skipping insertion in model container [2023-04-03 02:06:16,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:06:16" (3/3) ... [2023-04-03 02:06:16,568 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-03 02:06:16,581 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:06:16,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:06:16,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:06:16,634 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;@57a3280e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:06:16,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:06:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 02:06:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-03 02:06:16,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:16,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:16,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:16,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1201355822, now seen corresponding path program 1 times [2023-04-03 02:06:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:16,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440854404] [2023-04-03 02:06:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:16,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:06:28,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440854404] [2023-04-03 02:06:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440854404] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:28,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:28,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:06:28,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276642214] [2023-04-03 02:06:28,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:28,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:06:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:28,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:06:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:06:28,747 INFO L87 Difference]: Start difference. First operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:06:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:34,003 INFO L93 Difference]: Finished difference Result 594 states and 941 transitions. [2023-04-03 02:06:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:06:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-03 02:06:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:34,019 INFO L225 Difference]: With dead ends: 594 [2023-04-03 02:06:34,019 INFO L226 Difference]: Without dead ends: 536 [2023-04-03 02:06:34,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:06:34,026 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6477 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7271 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6480 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 7470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 7271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:34,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6480 Valid, 206 Invalid, 7470 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [199 Valid, 7271 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-04-03 02:06:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-04-03 02:06:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 510. [2023-04-03 02:06:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.680672268907563) internal successors, (800), 477 states have internal predecessors, (800), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-03 02:06:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 834 transitions. [2023-04-03 02:06:34,161 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 834 transitions. Word has length 160 [2023-04-03 02:06:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:34,162 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 834 transitions. [2023-04-03 02:06:34,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:06:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 834 transitions. [2023-04-03 02:06:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-03 02:06:34,165 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:34,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:34,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:06:34,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:34,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash -57214818, now seen corresponding path program 1 times [2023-04-03 02:06:34,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:34,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961368168] [2023-04-03 02:06:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:06:39,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:39,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961368168] [2023-04-03 02:06:39,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961368168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:39,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:39,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:39,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311292893] [2023-04-03 02:06:39,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:39,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:39,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:39,284 INFO L87 Difference]: Start difference. First operand 510 states and 834 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:42,325 INFO L93 Difference]: Finished difference Result 593 states and 939 transitions. [2023-04-03 02:06:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-03 02:06:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:42,330 INFO L225 Difference]: With dead ends: 593 [2023-04-03 02:06:42,330 INFO L226 Difference]: Without dead ends: 543 [2023-04-03 02:06:42,331 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 [2023-04-03 02:06:42,332 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 849 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:42,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 118 Invalid, 6335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-03 02:06:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-04-03 02:06:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 510. [2023-04-03 02:06:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6785714285714286) internal successors, (799), 477 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:06:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 832 transitions. [2023-04-03 02:06:42,380 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 832 transitions. Word has length 161 [2023-04-03 02:06:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:42,380 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 832 transitions. [2023-04-03 02:06:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 832 transitions. [2023-04-03 02:06:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-03 02:06:42,384 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:42,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:42,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:06:42,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:42,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2136837957, now seen corresponding path program 1 times [2023-04-03 02:06:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:42,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285375572] [2023-04-03 02:06:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:06:46,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:46,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285375572] [2023-04-03 02:06:46,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285375572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:46,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:46,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:46,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137434776] [2023-04-03 02:06:46,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:46,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:46,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:46,686 INFO L87 Difference]: Start difference. First operand 510 states and 832 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:49,125 INFO L93 Difference]: Finished difference Result 587 states and 923 transitions. [2023-04-03 02:06:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-03 02:06:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:49,128 INFO L225 Difference]: With dead ends: 587 [2023-04-03 02:06:49,128 INFO L226 Difference]: Without dead ends: 542 [2023-04-03 02:06:49,129 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 [2023-04-03 02:06:49,130 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 854 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:49,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 111 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-03 02:06:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-04-03 02:06:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2023-04-03 02:06:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6764705882352942) internal successors, (798), 477 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:06:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 831 transitions. [2023-04-03 02:06:49,172 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 831 transitions. Word has length 162 [2023-04-03 02:06:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:49,172 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 831 transitions. [2023-04-03 02:06:49,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 831 transitions. [2023-04-03 02:06:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-03 02:06:49,174 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:49,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:49,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:06:49,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:49,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1073934425, now seen corresponding path program 1 times [2023-04-03 02:06:49,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:49,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710860745] [2023-04-03 02:06:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:49,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:06:53,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:53,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710860745] [2023-04-03 02:06:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710860745] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:53,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:53,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:53,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414570373] [2023-04-03 02:06:53,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:53,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:53,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:53,490 INFO L87 Difference]: Start difference. First operand 510 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:06:56,102 INFO L93 Difference]: Finished difference Result 593 states and 928 transitions. [2023-04-03 02:06:56,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:06:56,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-03 02:06:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:06:56,105 INFO L225 Difference]: With dead ends: 593 [2023-04-03 02:06:56,105 INFO L226 Difference]: Without dead ends: 548 [2023-04-03 02:06:56,106 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 [2023-04-03 02:06:56,107 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1655 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 5610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:06:56,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1662 Valid, 105 Invalid, 5610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-03 02:06:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-04-03 02:06:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 510. [2023-04-03 02:06:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6743697478991597) internal successors, (797), 477 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:06:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 830 transitions. [2023-04-03 02:06:56,165 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 830 transitions. Word has length 163 [2023-04-03 02:06:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:06:56,165 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 830 transitions. [2023-04-03 02:06:56,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:06:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 830 transitions. [2023-04-03 02:06:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-03 02:06:56,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:06:56,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:06:56,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:06:56,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:06:56,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:06:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1376951900, now seen corresponding path program 1 times [2023-04-03 02:06:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:06:56,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211682823] [2023-04-03 02:06:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:06:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:06:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:06:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:06:59,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:06:59,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211682823] [2023-04-03 02:06:59,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211682823] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:06:59,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:06:59,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:06:59,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055120581] [2023-04-03 02:06:59,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:06:59,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:06:59,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:06:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:06:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:06:59,808 INFO L87 Difference]: Start difference. First operand 510 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:02,234 INFO L93 Difference]: Finished difference Result 599 states and 933 transitions. [2023-04-03 02:07:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:07:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 164 [2023-04-03 02:07:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:02,237 INFO L225 Difference]: With dead ends: 599 [2023-04-03 02:07:02,237 INFO L226 Difference]: Without dead ends: 554 [2023-04-03 02:07:02,238 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 [2023-04-03 02:07:02,239 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1656 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 5559 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 5619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:02,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 107 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 5559 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:07:02,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2023-04-03 02:07:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 510. [2023-04-03 02:07:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6722689075630253) internal successors, (796), 477 states have internal predecessors, (796), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 829 transitions. [2023-04-03 02:07:02,287 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 829 transitions. Word has length 164 [2023-04-03 02:07:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:02,288 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 829 transitions. [2023-04-03 02:07:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 829 transitions. [2023-04-03 02:07:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-03 02:07:02,290 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:02,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:02,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:07:02,291 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:02,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1073847632, now seen corresponding path program 1 times [2023-04-03 02:07:02,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:02,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497625446] [2023-04-03 02:07:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:02,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:07:06,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497625446] [2023-04-03 02:07:06,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497625446] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:06,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:06,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:07:06,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724731532] [2023-04-03 02:07:06,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:06,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:07:06,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:07:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:07:06,022 INFO L87 Difference]: Start difference. First operand 510 states and 829 transitions. Second operand has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:08,670 INFO L93 Difference]: Finished difference Result 605 states and 938 transitions. [2023-04-03 02:07:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:07:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 165 [2023-04-03 02:07:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:08,674 INFO L225 Difference]: With dead ends: 605 [2023-04-03 02:07:08,674 INFO L226 Difference]: Without dead ends: 560 [2023-04-03 02:07:08,674 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 [2023-04-03 02:07:08,675 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 877 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 5596 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 5654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 5596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:08,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 117 Invalid, 5654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 5596 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-03 02:07:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2023-04-03 02:07:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 510. [2023-04-03 02:07:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6701680672268908) internal successors, (795), 477 states have internal predecessors, (795), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 828 transitions. [2023-04-03 02:07:08,720 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 828 transitions. Word has length 165 [2023-04-03 02:07:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:08,720 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 828 transitions. [2023-04-03 02:07:08,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 828 transitions. [2023-04-03 02:07:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-03 02:07:08,723 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:08,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:07:08,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:08,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1561831848, now seen corresponding path program 1 times [2023-04-03 02:07:08,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:08,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137654826] [2023-04-03 02:07:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:07:15,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:15,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137654826] [2023-04-03 02:07:15,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137654826] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:15,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:15,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:07:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464659866] [2023-04-03 02:07:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:07:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:07:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:07:15,094 INFO L87 Difference]: Start difference. First operand 510 states and 828 transitions. Second operand has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:07:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:20,718 INFO L93 Difference]: Finished difference Result 628 states and 973 transitions. [2023-04-03 02:07:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-03 02:07:20,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 167 [2023-04-03 02:07:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:20,721 INFO L225 Difference]: With dead ends: 628 [2023-04-03 02:07:20,721 INFO L226 Difference]: Without dead ends: 580 [2023-04-03 02:07:20,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2023-04-03 02:07:20,723 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5641 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 9732 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5645 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 9888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 9732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:20,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5645 Valid, 266 Invalid, 9888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 9732 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-03 02:07:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-04-03 02:07:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 514. [2023-04-03 02:07:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 480 states have (on average 1.6666666666666667) internal successors, (800), 481 states have internal predecessors, (800), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 833 transitions. [2023-04-03 02:07:20,793 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 833 transitions. Word has length 167 [2023-04-03 02:07:20,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:20,793 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 833 transitions. [2023-04-03 02:07:20,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:07:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 833 transitions. [2023-04-03 02:07:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-03 02:07:20,796 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:20,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:20,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:07:20,796 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:20,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1689128475, now seen corresponding path program 1 times [2023-04-03 02:07:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:20,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480340077] [2023-04-03 02:07:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:20,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:07:22,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480340077] [2023-04-03 02:07:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480340077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:22,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:07:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822480064] [2023-04-03 02:07:22,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:22,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:07:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:07:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:07:22,452 INFO L87 Difference]: Start difference. First operand 514 states and 833 transitions. Second operand has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:24,901 INFO L93 Difference]: Finished difference Result 592 states and 930 transitions. [2023-04-03 02:07:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:07:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 168 [2023-04-03 02:07:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:24,906 INFO L225 Difference]: With dead ends: 592 [2023-04-03 02:07:24,906 INFO L226 Difference]: Without dead ends: 539 [2023-04-03 02:07:24,907 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 [2023-04-03 02:07:24,910 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1620 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 5509 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 5509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:24,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1623 Valid, 102 Invalid, 5569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 5509 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-03 02:07:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-03 02:07:24,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 512. [2023-04-03 02:07:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 478 states have (on average 1.6569037656903767) internal successors, (792), 479 states have internal predecessors, (792), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 825 transitions. [2023-04-03 02:07:24,973 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 825 transitions. Word has length 168 [2023-04-03 02:07:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:24,973 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 825 transitions. [2023-04-03 02:07:24,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:07:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 825 transitions. [2023-04-03 02:07:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-03 02:07:24,976 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:24,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:24,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:07:24,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:24,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1760255423, now seen corresponding path program 1 times [2023-04-03 02:07:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:24,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842249597] [2023-04-03 02:07:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:24,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:07:32,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842249597] [2023-04-03 02:07:32,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842249597] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:32,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:32,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:07:32,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042916722] [2023-04-03 02:07:32,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:32,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:07:32,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:07:32,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:07:32,783 INFO L87 Difference]: Start difference. First operand 512 states and 825 transitions. Second operand has 24 states, 12 states have (on average 12.5) internal successors, (150), 14 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:07:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:38,857 INFO L93 Difference]: Finished difference Result 607 states and 935 transitions. [2023-04-03 02:07:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-03 02:07:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.5) internal successors, (150), 14 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 170 [2023-04-03 02:07:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:38,860 INFO L225 Difference]: With dead ends: 607 [2023-04-03 02:07:38,860 INFO L226 Difference]: Without dead ends: 559 [2023-04-03 02:07:38,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=569, Invalid=1881, Unknown=0, NotChecked=0, Total=2450 [2023-04-03 02:07:38,862 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4762 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 8866 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4765 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 9021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 8866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:38,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4765 Valid, 228 Invalid, 9021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 8866 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-03 02:07:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-04-03 02:07:38,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 512. [2023-04-03 02:07:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 478 states have (on average 1.6548117154811715) internal successors, (791), 479 states have internal predecessors, (791), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:07:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 824 transitions. [2023-04-03 02:07:38,946 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 824 transitions. Word has length 170 [2023-04-03 02:07:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:38,946 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 824 transitions. [2023-04-03 02:07:38,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.5) internal successors, (150), 14 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:07:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 824 transitions. [2023-04-03 02:07:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-03 02:07:38,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:38,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:38,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:07:38,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:38,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash -415251358, now seen corresponding path program 1 times [2023-04-03 02:07:38,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:38,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111615339] [2023-04-03 02:07:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:38,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:07:42,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:42,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111615339] [2023-04-03 02:07:42,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111615339] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:42,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:42,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:07:42,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081347210] [2023-04-03 02:07:42,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:07:42,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:07:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:07:42,588 INFO L87 Difference]: Start difference. First operand 512 states and 824 transitions. Second operand has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:07:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:07:43,321 INFO L93 Difference]: Finished difference Result 595 states and 932 transitions. [2023-04-03 02:07:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 02:07:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 171 [2023-04-03 02:07:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:07:43,326 INFO L225 Difference]: With dead ends: 595 [2023-04-03 02:07:43,326 INFO L226 Difference]: Without dead ends: 549 [2023-04-03 02:07:43,327 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 [2023-04-03 02:07:43,327 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 40 mSDsluCounter, 7941 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8669 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:07:43,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 8669 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:07:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-04-03 02:07:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 520. [2023-04-03 02:07:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 483 states have (on average 1.6438923395445135) internal successors, (794), 485 states have internal predecessors, (794), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2023-04-03 02:07:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 830 transitions. [2023-04-03 02:07:43,420 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 830 transitions. Word has length 171 [2023-04-03 02:07:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:07:43,421 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 830 transitions. [2023-04-03 02:07:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:07:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 830 transitions. [2023-04-03 02:07:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-03 02:07:43,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:43,424 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:07:43,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:07:43,424 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:43,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1791594333, now seen corresponding path program 1 times [2023-04-03 02:07:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:43,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894700266] [2023-04-03 02:07:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:07:56,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:56,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894700266] [2023-04-03 02:07:56,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894700266] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:07:56,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345882260] [2023-04-03 02:07:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:56,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:07:56,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:07:56,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:07:56,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:07:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:56,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 2519 conjuncts, 122 conjunts are in the unsatisfiable core [2023-04-03 02:07:56,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:08:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:43,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:08:44,737 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 39063 disjunctions. This might take some time...