/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:31:53,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:31:53,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:31:53,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:31:53,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:31:53,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:31:53,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:31:53,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:31:53,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:31:53,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:31:53,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:31:53,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:31:53,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:31:53,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:31:53,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:31:53,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:31:53,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:31:53,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:31:53,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:31:53,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:31:53,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:31:53,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:31:53,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:31:53,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:31:53,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:31:53,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:31:53,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:31:53,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:31:53,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:31:53,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:31:53,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:31:53,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:31:53,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:31:53,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:31:53,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:31:53,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:31:53,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:31:53,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:31:53,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:31:53,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:31:53,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:31:53,152 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 02:31:53,175 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:31:53,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:31:53,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:31:53,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:31:53,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:31:53,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:31:53,177 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:31:53,177 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:31:53,177 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:31:53,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:31:53,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:31:53,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:53,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:31:53,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:31:53,180 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:31:53,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:31:53,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:31:53,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:31:53,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:31:53,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:31:53,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:31:53,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:31:53,395 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:31:53,396 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:31:53,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:31:54,379 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:31:54,551 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:31:54,552 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:31:54,568 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51293d4cc/aff5b54ef4974fe49ea29c30f3dfe029/FLAG37cbdeefb [2023-04-03 02:31:54,582 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51293d4cc/aff5b54ef4974fe49ea29c30f3dfe029 [2023-04-03 02:31:54,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:31:54,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:31:54,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:54,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:31:54,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:31:54,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30aa6196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54, skipping insertion in model container [2023-04-03 02:31:54,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:31:54,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:31:54,781 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7165,7178] [2023-04-03 02:31:54,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:54,820 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:31:54,856 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7165,7178] [2023-04-03 02:31:54,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:31:54,891 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:31:54,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54 WrapperNode [2023-04-03 02:31:54,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:31:54,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:31:54,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:31:54,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:31:54,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,929 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:31:54,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:31:54,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:31:54,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:31:54,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (1/1) ... [2023-04-03 02:31:54,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:31:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:31:54,975 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 02:31:54,982 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 02:31:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:31:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:31:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:31:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:31:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:31:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:31:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:31:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:31:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:31:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:31:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:31:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:31:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:31:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:31:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:31:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:31:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:31:55,120 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:31:55,122 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:31:55,583 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:31:55,713 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:31:55,713 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:31:55,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:55 BoogieIcfgContainer [2023-04-03 02:31:55,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:31:55,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:31:55,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:31:55,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:31:55,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:31:54" (1/3) ... [2023-04-03 02:31:55,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632d1854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:55, skipping insertion in model container [2023-04-03 02:31:55,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:31:54" (2/3) ... [2023-04-03 02:31:55,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632d1854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:31:55, skipping insertion in model container [2023-04-03 02:31:55,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:31:55" (3/3) ... [2023-04-03 02:31:55,724 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-03 02:31:55,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:31:55,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:31:55,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:31:55,787 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;@22b602fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:31:55,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:31:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 116 states have (on average 1.6810344827586208) internal successors, (195), 117 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:31:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 02:31:55,800 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:55,800 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] [2023-04-03 02:31:55,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:55,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash -890203947, now seen corresponding path program 1 times [2023-04-03 02:31:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:55,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305451026] [2023-04-03 02:31:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:55,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:56,272 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 02:31:56,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305451026] [2023-04-03 02:31:56,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305451026] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:56,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:56,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:56,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808898254] [2023-04-03 02:31:56,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:56,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:56,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:56,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:56,316 INFO L87 Difference]: Start difference. First operand has 122 states, 116 states have (on average 1.6810344827586208) internal successors, (195), 117 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:56,538 INFO L93 Difference]: Finished difference Result 325 states and 512 transitions. [2023-04-03 02:31:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-03 02:31:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:56,550 INFO L225 Difference]: With dead ends: 325 [2023-04-03 02:31:56,550 INFO L226 Difference]: Without dead ends: 235 [2023-04-03 02:31:56,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:56,554 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 422 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:56,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 522 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:56,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-03 02:31:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2023-04-03 02:31:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.3920704845814977) internal successors, (316), 227 states have internal predecessors, (316), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 319 transitions. [2023-04-03 02:31:56,599 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 319 transitions. Word has length 46 [2023-04-03 02:31:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:56,599 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 319 transitions. [2023-04-03 02:31:56,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 319 transitions. [2023-04-03 02:31:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:31:56,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:56,601 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] [2023-04-03 02:31:56,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:31:56,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:56,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:56,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1716581174, now seen corresponding path program 1 times [2023-04-03 02:31:56,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:56,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758559910] [2023-04-03 02:31:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:56,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:56,749 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 02:31:56,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:56,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758559910] [2023-04-03 02:31:56,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758559910] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:56,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:56,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382182499] [2023-04-03 02:31:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:56,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:56,752 INFO L87 Difference]: Start difference. First operand 231 states and 319 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:56,913 INFO L93 Difference]: Finished difference Result 504 states and 710 transitions. [2023-04-03 02:31:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 02:31:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:56,918 INFO L225 Difference]: With dead ends: 504 [2023-04-03 02:31:56,922 INFO L226 Difference]: Without dead ends: 303 [2023-04-03 02:31:56,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:31:56,929 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 405 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:56,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 163 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-04-03 02:31:56,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2023-04-03 02:31:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 297 states have (on average 1.3973063973063973) internal successors, (415), 297 states have internal predecessors, (415), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 418 transitions. [2023-04-03 02:31:56,976 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 418 transitions. Word has length 47 [2023-04-03 02:31:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:56,976 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 418 transitions. [2023-04-03 02:31:56,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 418 transitions. [2023-04-03 02:31:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:31:56,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:56,983 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] [2023-04-03 02:31:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:31:56,983 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:56,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:56,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1879649688, now seen corresponding path program 1 times [2023-04-03 02:31:56,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876963150] [2023-04-03 02:31:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:57,097 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 02:31:57,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876963150] [2023-04-03 02:31:57,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876963150] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:57,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98226618] [2023-04-03 02:31:57,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:57,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:57,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:57,100 INFO L87 Difference]: Start difference. First operand 301 states and 418 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:57,298 INFO L93 Difference]: Finished difference Result 702 states and 1000 transitions. [2023-04-03 02:31:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:57,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 02:31:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:57,301 INFO L225 Difference]: With dead ends: 702 [2023-04-03 02:31:57,301 INFO L226 Difference]: Without dead ends: 467 [2023-04-03 02:31:57,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:31:57,307 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 374 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:57,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 183 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:57,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-04-03 02:31:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 465. [2023-04-03 02:31:57,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.4143167028199566) internal successors, (652), 461 states have internal predecessors, (652), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 655 transitions. [2023-04-03 02:31:57,377 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 655 transitions. Word has length 47 [2023-04-03 02:31:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:57,378 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 655 transitions. [2023-04-03 02:31:57,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 655 transitions. [2023-04-03 02:31:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:31:57,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:57,380 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] [2023-04-03 02:31:57,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:31:57,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:57,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash 705254809, now seen corresponding path program 1 times [2023-04-03 02:31:57,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:57,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882149921] [2023-04-03 02:31:57,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:57,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:57,468 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 02:31:57,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:57,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882149921] [2023-04-03 02:31:57,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882149921] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:57,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:57,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:31:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17474874] [2023-04-03 02:31:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:57,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:31:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:31:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:31:57,470 INFO L87 Difference]: Start difference. First operand 465 states and 655 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:57,690 INFO L93 Difference]: Finished difference Result 1214 states and 1741 transitions. [2023-04-03 02:31:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:31:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-04-03 02:31:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:57,693 INFO L225 Difference]: With dead ends: 1214 [2023-04-03 02:31:57,693 INFO L226 Difference]: Without dead ends: 795 [2023-04-03 02:31:57,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:31:57,695 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 379 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:57,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 175 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:31:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-04-03 02:31:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 793. [2023-04-03 02:31:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 789 states have (on average 1.4195183776932827) internal successors, (1120), 789 states have internal predecessors, (1120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1123 transitions. [2023-04-03 02:31:57,785 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1123 transitions. Word has length 47 [2023-04-03 02:31:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:57,785 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1123 transitions. [2023-04-03 02:31:57,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1123 transitions. [2023-04-03 02:31:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 02:31:57,786 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:57,786 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] [2023-04-03 02:31:57,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:31:57,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:57,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2115221418, now seen corresponding path program 1 times [2023-04-03 02:31:57,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:57,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136782135] [2023-04-03 02:31:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:58,203 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 02:31:58,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:58,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136782135] [2023-04-03 02:31:58,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136782135] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:58,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:58,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:31:58,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288585969] [2023-04-03 02:31:58,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:58,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:31:58,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:58,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:31:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:31:58,209 INFO L87 Difference]: Start difference. First operand 793 states and 1123 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:31:59,134 INFO L93 Difference]: Finished difference Result 4390 states and 6366 transitions. [2023-04-03 02:31:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-03 02:31:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-03 02:31:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:31:59,146 INFO L225 Difference]: With dead ends: 4390 [2023-04-03 02:31:59,146 INFO L226 Difference]: Without dead ends: 3732 [2023-04-03 02:31:59,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:31:59,148 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1144 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:31:59,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1144 Valid, 800 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:31:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2023-04-03 02:31:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 2330. [2023-04-03 02:31:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2326 states have (on average 1.418744625967326) internal successors, (3300), 2326 states have internal predecessors, (3300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3303 transitions. [2023-04-03 02:31:59,478 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3303 transitions. Word has length 48 [2023-04-03 02:31:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:31:59,479 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3303 transitions. [2023-04-03 02:31:59,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:31:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3303 transitions. [2023-04-03 02:31:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 02:31:59,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:31:59,480 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] [2023-04-03 02:31:59,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:31:59,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:31:59,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:31:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1256091754, now seen corresponding path program 1 times [2023-04-03 02:31:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:31:59,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43144016] [2023-04-03 02:31:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:31:59,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:31:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:31:59,859 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 02:31:59,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:31:59,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43144016] [2023-04-03 02:31:59,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43144016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:31:59,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:31:59,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:31:59,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380333164] [2023-04-03 02:31:59,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:31:59,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:31:59,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:31:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:31:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:31:59,861 INFO L87 Difference]: Start difference. First operand 2330 states and 3303 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:00,755 INFO L93 Difference]: Finished difference Result 3582 states and 5091 transitions. [2023-04-03 02:32:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:32:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-03 02:32:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:00,767 INFO L225 Difference]: With dead ends: 3582 [2023-04-03 02:32:00,767 INFO L226 Difference]: Without dead ends: 3429 [2023-04-03 02:32:00,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:32:00,769 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 1007 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:00,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 986 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:32:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2023-04-03 02:32:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2754. [2023-04-03 02:32:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2750 states have (on average 1.4141818181818182) internal successors, (3889), 2750 states have internal predecessors, (3889), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 3892 transitions. [2023-04-03 02:32:01,100 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 3892 transitions. Word has length 48 [2023-04-03 02:32:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:01,101 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 3892 transitions. [2023-04-03 02:32:01,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 3892 transitions. [2023-04-03 02:32:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 02:32:01,101 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:01,101 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] [2023-04-03 02:32:01,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:32:01,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:01,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:01,102 INFO L85 PathProgramCache]: Analyzing trace with hash -75811830, now seen corresponding path program 1 times [2023-04-03 02:32:01,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:01,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989118470] [2023-04-03 02:32:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:01,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:01,398 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 02:32:01,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:01,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989118470] [2023-04-03 02:32:01,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989118470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:01,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:01,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:32:01,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391658837] [2023-04-03 02:32:01,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:01,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:32:01,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:01,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:32:01,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:32:01,400 INFO L87 Difference]: Start difference. First operand 2754 states and 3892 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:02,302 INFO L93 Difference]: Finished difference Result 4433 states and 6313 transitions. [2023-04-03 02:32:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-03 02:32:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2023-04-03 02:32:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:02,313 INFO L225 Difference]: With dead ends: 4433 [2023-04-03 02:32:02,313 INFO L226 Difference]: Without dead ends: 3982 [2023-04-03 02:32:02,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:32:02,315 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1030 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:02,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 852 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:32:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2023-04-03 02:32:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 3287. [2023-04-03 02:32:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 3283 states have (on average 1.4087724642095645) internal successors, (4625), 3283 states have internal predecessors, (4625), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 4628 transitions. [2023-04-03 02:32:02,707 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 4628 transitions. Word has length 48 [2023-04-03 02:32:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:02,707 INFO L495 AbstractCegarLoop]: Abstraction has 3287 states and 4628 transitions. [2023-04-03 02:32:02,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 4628 transitions. [2023-04-03 02:32:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:32:02,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:02,708 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] [2023-04-03 02:32:02,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:32:02,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:02,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1043122689, now seen corresponding path program 1 times [2023-04-03 02:32:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:02,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928217133] [2023-04-03 02:32:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:02,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:03,016 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 02:32:03,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:03,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928217133] [2023-04-03 02:32:03,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928217133] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:03,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:03,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:32:03,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480169290] [2023-04-03 02:32:03,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:32:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:32:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:32:03,018 INFO L87 Difference]: Start difference. First operand 3287 states and 4628 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:04,229 INFO L93 Difference]: Finished difference Result 6199 states and 8763 transitions. [2023-04-03 02:32:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:32:04,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-03 02:32:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:04,271 INFO L225 Difference]: With dead ends: 6199 [2023-04-03 02:32:04,272 INFO L226 Difference]: Without dead ends: 5541 [2023-04-03 02:32:04,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:32:04,282 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 389 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:04,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1055 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:32:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2023-04-03 02:32:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 3314. [2023-04-03 02:32:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3314 states, 3310 states have (on average 1.4054380664652568) internal successors, (4652), 3310 states have internal predecessors, (4652), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3314 states to 3314 states and 4655 transitions. [2023-04-03 02:32:04,858 INFO L78 Accepts]: Start accepts. Automaton has 3314 states and 4655 transitions. Word has length 50 [2023-04-03 02:32:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:04,859 INFO L495 AbstractCegarLoop]: Abstraction has 3314 states and 4655 transitions. [2023-04-03 02:32:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3314 states and 4655 transitions. [2023-04-03 02:32:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:32:04,860 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:04,860 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] [2023-04-03 02:32:04,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:32:04,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:04,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1919941023, now seen corresponding path program 1 times [2023-04-03 02:32:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560668309] [2023-04-03 02:32:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:04,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:05,210 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 02:32:05,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:05,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560668309] [2023-04-03 02:32:05,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560668309] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:05,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:05,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:32:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153547719] [2023-04-03 02:32:05,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:05,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:32:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:05,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:32:05,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:32:05,212 INFO L87 Difference]: Start difference. First operand 3314 states and 4655 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:06,499 INFO L93 Difference]: Finished difference Result 7703 states and 10877 transitions. [2023-04-03 02:32:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:32:06,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-03 02:32:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:06,517 INFO L225 Difference]: With dead ends: 7703 [2023-04-03 02:32:06,517 INFO L226 Difference]: Without dead ends: 6825 [2023-04-03 02:32:06,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2023-04-03 02:32:06,520 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 563 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:06,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1231 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:32:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6825 states. [2023-04-03 02:32:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 4556. [2023-04-03 02:32:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4556 states, 4552 states have (on average 1.4114674868189807) internal successors, (6425), 4552 states have internal predecessors, (6425), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4556 states to 4556 states and 6428 transitions. [2023-04-03 02:32:07,105 INFO L78 Accepts]: Start accepts. Automaton has 4556 states and 6428 transitions. Word has length 50 [2023-04-03 02:32:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:07,105 INFO L495 AbstractCegarLoop]: Abstraction has 4556 states and 6428 transitions. [2023-04-03 02:32:07,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4556 states and 6428 transitions. [2023-04-03 02:32:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:32:07,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:07,106 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] [2023-04-03 02:32:07,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:32:07,106 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:07,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:07,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2092098977, now seen corresponding path program 1 times [2023-04-03 02:32:07,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:07,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679730132] [2023-04-03 02:32:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:07,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:07,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:07,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679730132] [2023-04-03 02:32:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679730132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-03 02:32:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091778784] [2023-04-03 02:32:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-03 02:32:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-03 02:32:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:32:07,450 INFO L87 Difference]: Start difference. First operand 4556 states and 6428 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:08,943 INFO L93 Difference]: Finished difference Result 8183 states and 11545 transitions. [2023-04-03 02:32:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-03 02:32:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-03 02:32:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:08,957 INFO L225 Difference]: With dead ends: 8183 [2023-04-03 02:32:08,957 INFO L226 Difference]: Without dead ends: 8037 [2023-04-03 02:32:08,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:32:08,959 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 490 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:08,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1353 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:32:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2023-04-03 02:32:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 4559. [2023-04-03 02:32:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4555 states have (on average 1.4111964873765093) internal successors, (6428), 4555 states have internal predecessors, (6428), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 6431 transitions. [2023-04-03 02:32:09,510 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 6431 transitions. Word has length 50 [2023-04-03 02:32:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:09,510 INFO L495 AbstractCegarLoop]: Abstraction has 4559 states and 6431 transitions. [2023-04-03 02:32:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 6431 transitions. [2023-04-03 02:32:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:32:09,511 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:09,511 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] [2023-04-03 02:32:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:32:09,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:09,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:09,512 INFO L85 PathProgramCache]: Analyzing trace with hash 465149715, now seen corresponding path program 1 times [2023-04-03 02:32:09,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:09,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560587579] [2023-04-03 02:32:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:09,540 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 02:32:09,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:09,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560587579] [2023-04-03 02:32:09,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560587579] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:09,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:09,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:09,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602033026] [2023-04-03 02:32:09,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:09,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:09,541 INFO L87 Difference]: Start difference. First operand 4559 states and 6431 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:10,105 INFO L93 Difference]: Finished difference Result 8118 states and 11524 transitions. [2023-04-03 02:32:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:32:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:10,113 INFO L225 Difference]: With dead ends: 8118 [2023-04-03 02:32:10,113 INFO L226 Difference]: Without dead ends: 4269 [2023-04-03 02:32:10,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:10,119 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 85 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:10,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 265 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2023-04-03 02:32:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 4265. [2023-04-03 02:32:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4265 states, 4261 states have (on average 1.4104670265195964) internal successors, (6010), 4261 states have internal predecessors, (6010), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4265 states to 4265 states and 6013 transitions. [2023-04-03 02:32:10,652 INFO L78 Accepts]: Start accepts. Automaton has 4265 states and 6013 transitions. Word has length 51 [2023-04-03 02:32:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:10,653 INFO L495 AbstractCegarLoop]: Abstraction has 4265 states and 6013 transitions. [2023-04-03 02:32:10,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4265 states and 6013 transitions. [2023-04-03 02:32:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:32:10,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:10,653 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] [2023-04-03 02:32:10,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 02:32:10,654 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:10,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:10,654 INFO L85 PathProgramCache]: Analyzing trace with hash -131407402, now seen corresponding path program 1 times [2023-04-03 02:32:10,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:10,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192004611] [2023-04-03 02:32:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:10,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:10,681 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 02:32:10,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:10,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192004611] [2023-04-03 02:32:10,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192004611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:10,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:10,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:10,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704187934] [2023-04-03 02:32:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:10,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:10,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:10,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:10,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:10,682 INFO L87 Difference]: Start difference. First operand 4265 states and 6013 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:11,217 INFO L93 Difference]: Finished difference Result 7559 states and 10709 transitions. [2023-04-03 02:32:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:11,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:32:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:11,224 INFO L225 Difference]: With dead ends: 7559 [2023-04-03 02:32:11,224 INFO L226 Difference]: Without dead ends: 4032 [2023-04-03 02:32:11,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:11,229 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 78 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:11,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 265 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2023-04-03 02:32:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 3938. [2023-04-03 02:32:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3934 states have (on average 1.4077275038129131) internal successors, (5538), 3934 states have internal predecessors, (5538), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 5541 transitions. [2023-04-03 02:32:11,748 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 5541 transitions. Word has length 51 [2023-04-03 02:32:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:11,749 INFO L495 AbstractCegarLoop]: Abstraction has 3938 states and 5541 transitions. [2023-04-03 02:32:11,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 5541 transitions. [2023-04-03 02:32:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:32:11,749 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:11,749 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] [2023-04-03 02:32:11,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 02:32:11,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:11,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 270978740, now seen corresponding path program 1 times [2023-04-03 02:32:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:11,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576590166] [2023-04-03 02:32:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:11,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:14,092 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 02:32:14,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:14,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576590166] [2023-04-03 02:32:14,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576590166] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:14,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 02:32:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857913751] [2023-04-03 02:32:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 02:32:14,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 02:32:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-04-03 02:32:14,094 INFO L87 Difference]: Start difference. First operand 3938 states and 5541 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:19,695 INFO L93 Difference]: Finished difference Result 5873 states and 8251 transitions. [2023-04-03 02:32:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 02:32:19,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2023-04-03 02:32:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:19,704 INFO L225 Difference]: With dead ends: 5873 [2023-04-03 02:32:19,704 INFO L226 Difference]: Without dead ends: 5167 [2023-04-03 02:32:19,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=570, Invalid=1592, Unknown=0, NotChecked=0, Total=2162 [2023-04-03 02:32:19,707 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 619 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:19,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 1267 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:32:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5167 states. [2023-04-03 02:32:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5167 to 3916. [2023-04-03 02:32:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3912 states have (on average 1.4092535787321063) internal successors, (5513), 3912 states have internal predecessors, (5513), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 5516 transitions. [2023-04-03 02:32:20,283 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 5516 transitions. Word has length 52 [2023-04-03 02:32:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:20,283 INFO L495 AbstractCegarLoop]: Abstraction has 3916 states and 5516 transitions. [2023-04-03 02:32:20,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 5516 transitions. [2023-04-03 02:32:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:32:20,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:20,285 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] [2023-04-03 02:32:20,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:32:20,285 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:20,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash 538662913, now seen corresponding path program 1 times [2023-04-03 02:32:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:20,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976637751] [2023-04-03 02:32:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:20,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:20,350 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 02:32:20,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:20,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976637751] [2023-04-03 02:32:20,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976637751] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:20,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:20,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:20,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151913841] [2023-04-03 02:32:20,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:20,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:20,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:20,351 INFO L87 Difference]: Start difference. First operand 3916 states and 5516 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:21,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:21,055 INFO L93 Difference]: Finished difference Result 7535 states and 10658 transitions. [2023-04-03 02:32:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:21,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-03 02:32:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:21,061 INFO L225 Difference]: With dead ends: 7535 [2023-04-03 02:32:21,061 INFO L226 Difference]: Without dead ends: 4778 [2023-04-03 02:32:21,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:21,065 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 81 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:21,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 290 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2023-04-03 02:32:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 4434. [2023-04-03 02:32:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4430 states have (on average 1.4) internal successors, (6202), 4430 states have internal predecessors, (6202), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6205 transitions. [2023-04-03 02:32:21,791 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6205 transitions. Word has length 56 [2023-04-03 02:32:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:21,791 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6205 transitions. [2023-04-03 02:32:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6205 transitions. [2023-04-03 02:32:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:32:21,794 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:21,794 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] [2023-04-03 02:32:21,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 02:32:21,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:21,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash 817608885, now seen corresponding path program 1 times [2023-04-03 02:32:21,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:21,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364990566] [2023-04-03 02:32:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:21,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:21,839 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 02:32:21,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:21,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364990566] [2023-04-03 02:32:21,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364990566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:21,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:21,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:21,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38424696] [2023-04-03 02:32:21,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:21,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:21,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:21,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:21,841 INFO L87 Difference]: Start difference. First operand 4434 states and 6205 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:22,472 INFO L93 Difference]: Finished difference Result 7280 states and 10194 transitions. [2023-04-03 02:32:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:32:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:22,478 INFO L225 Difference]: With dead ends: 7280 [2023-04-03 02:32:22,479 INFO L226 Difference]: Without dead ends: 3785 [2023-04-03 02:32:22,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:22,485 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 70 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:22,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 296 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2023-04-03 02:32:23,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3783. [2023-04-03 02:32:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3779 states have (on average 1.3794654670547764) internal successors, (5213), 3779 states have internal predecessors, (5213), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 5216 transitions. [2023-04-03 02:32:23,165 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 5216 transitions. Word has length 59 [2023-04-03 02:32:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:23,165 INFO L495 AbstractCegarLoop]: Abstraction has 3783 states and 5216 transitions. [2023-04-03 02:32:23,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 5216 transitions. [2023-04-03 02:32:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:32:23,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:23,166 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] [2023-04-03 02:32:23,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:32:23,166 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:23,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash -708179979, now seen corresponding path program 1 times [2023-04-03 02:32:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:23,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890159146] [2023-04-03 02:32:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:23,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:23,231 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 02:32:23,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:23,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890159146] [2023-04-03 02:32:23,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890159146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:23,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:23,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:23,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779447528] [2023-04-03 02:32:23,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:23,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:23,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:23,234 INFO L87 Difference]: Start difference. First operand 3783 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:24,116 INFO L93 Difference]: Finished difference Result 8377 states and 11634 transitions. [2023-04-03 02:32:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:32:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:24,123 INFO L225 Difference]: With dead ends: 8377 [2023-04-03 02:32:24,124 INFO L226 Difference]: Without dead ends: 5308 [2023-04-03 02:32:24,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:24,128 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 77 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:24,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 273 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5308 states. [2023-04-03 02:32:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5308 to 4707. [2023-04-03 02:32:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4707 states, 4703 states have (on average 1.3657240059536466) internal successors, (6423), 4703 states have internal predecessors, (6423), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 6426 transitions. [2023-04-03 02:32:24,938 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 6426 transitions. Word has length 59 [2023-04-03 02:32:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:24,938 INFO L495 AbstractCegarLoop]: Abstraction has 4707 states and 6426 transitions. [2023-04-03 02:32:24,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 6426 transitions. [2023-04-03 02:32:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:32:24,939 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:24,939 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] [2023-04-03 02:32:24,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-03 02:32:24,939 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:24,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1986518474, now seen corresponding path program 1 times [2023-04-03 02:32:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:24,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724531143] [2023-04-03 02:32:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:24,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:25,016 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 02:32:25,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:25,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724531143] [2023-04-03 02:32:25,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724531143] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:25,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:25,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:32:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624481492] [2023-04-03 02:32:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:25,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:32:25,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:32:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:25,018 INFO L87 Difference]: Start difference. First operand 4707 states and 6426 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:26,115 INFO L93 Difference]: Finished difference Result 10800 states and 14829 transitions. [2023-04-03 02:32:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:32:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-03 02:32:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:26,123 INFO L225 Difference]: With dead ends: 10800 [2023-04-03 02:32:26,124 INFO L226 Difference]: Without dead ends: 6198 [2023-04-03 02:32:26,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:32:26,130 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 72 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:26,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 254 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6198 states. [2023-04-03 02:32:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6198 to 5618. [2023-04-03 02:32:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5614 states have (on average 1.3564303526897044) internal successors, (7615), 5614 states have internal predecessors, (7615), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 7618 transitions. [2023-04-03 02:32:27,126 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 7618 transitions. Word has length 62 [2023-04-03 02:32:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:27,127 INFO L495 AbstractCegarLoop]: Abstraction has 5618 states and 7618 transitions. [2023-04-03 02:32:27,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 7618 transitions. [2023-04-03 02:32:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 02:32:27,128 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:27,128 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] [2023-04-03 02:32:27,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-03 02:32:27,128 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:27,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash -176861343, now seen corresponding path program 1 times [2023-04-03 02:32:27,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:27,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962004165] [2023-04-03 02:32:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:27,308 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 02:32:27,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:27,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962004165] [2023-04-03 02:32:27,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962004165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:27,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:27,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:32:27,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738429332] [2023-04-03 02:32:27,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:32:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:32:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:27,310 INFO L87 Difference]: Start difference. First operand 5618 states and 7618 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:28,841 INFO L93 Difference]: Finished difference Result 7906 states and 10660 transitions. [2023-04-03 02:32:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-03 02:32:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-03 02:32:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:28,851 INFO L225 Difference]: With dead ends: 7906 [2023-04-03 02:32:28,851 INFO L226 Difference]: Without dead ends: 7904 [2023-04-03 02:32:28,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:32:28,853 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 250 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:28,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 836 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:32:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2023-04-03 02:32:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 6824. [2023-04-03 02:32:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6824 states, 6820 states have (on average 1.3538123167155425) internal successors, (9233), 6820 states have internal predecessors, (9233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6824 states to 6824 states and 9236 transitions. [2023-04-03 02:32:30,112 INFO L78 Accepts]: Start accepts. Automaton has 6824 states and 9236 transitions. Word has length 67 [2023-04-03 02:32:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:30,113 INFO L495 AbstractCegarLoop]: Abstraction has 6824 states and 9236 transitions. [2023-04-03 02:32:30,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6824 states and 9236 transitions. [2023-04-03 02:32:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:32:30,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:30,115 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:32:30,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-03 02:32:30,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:30,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 546114752, now seen corresponding path program 1 times [2023-04-03 02:32:30,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:30,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737094177] [2023-04-03 02:32:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:30,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:32:30,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737094177] [2023-04-03 02:32:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737094177] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:32:30,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:32:30,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:32:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168733317] [2023-04-03 02:32:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:32:30,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:32:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:32:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:32:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:32:30,245 INFO L87 Difference]: Start difference. First operand 6824 states and 9236 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:32:32,385 INFO L93 Difference]: Finished difference Result 16405 states and 22252 transitions. [2023-04-03 02:32:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:32:32,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:32:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:32:32,398 INFO L225 Difference]: With dead ends: 16405 [2023-04-03 02:32:32,398 INFO L226 Difference]: Without dead ends: 10124 [2023-04-03 02:32:32,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:32:32,407 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 728 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:32:32,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 281 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:32:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10124 states. [2023-04-03 02:32:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10124 to 7676. [2023-04-03 02:32:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 7672 states have (on average 1.3323774765380605) internal successors, (10222), 7672 states have internal predecessors, (10222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:33,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 10225 transitions. [2023-04-03 02:32:33,971 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 10225 transitions. Word has length 75 [2023-04-03 02:32:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:32:33,972 INFO L495 AbstractCegarLoop]: Abstraction has 7676 states and 10225 transitions. [2023-04-03 02:32:33,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:32:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 10225 transitions. [2023-04-03 02:32:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:32:33,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:32:33,974 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:32:33,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-03 02:32:33,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:32:33,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:32:33,974 INFO L85 PathProgramCache]: Analyzing trace with hash -419337179, now seen corresponding path program 1 times [2023-04-03 02:32:33,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:32:33,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509682965] [2023-04-03 02:32:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:33,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:32:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:35,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:32:35,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509682965] [2023-04-03 02:32:35,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509682965] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:32:35,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320452098] [2023-04-03 02:32:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:32:35,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:32:35,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:32:35,353 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 02:32:35,355 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 02:32:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:32:35,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-03 02:32:35,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:32:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:36,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:32:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:32:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320452098] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:32:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466933241] [2023-04-03 02:32:45,935 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-04-03 02:32:45,935 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:32:45,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:32:45,942 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:32:45,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:32:46,414 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 128 for LOIs [2023-04-03 02:32:51,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 109 for LOIs [2023-04-03 02:32:51,468 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:33:09,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1466933241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:09,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:33:09,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [24, 18, 16] total 95 [2023-04-03 02:33:09,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469669468] [2023-04-03 02:33:09,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:09,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-03 02:33:09,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-03 02:33:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=7596, Unknown=0, NotChecked=0, Total=8930 [2023-04-03 02:33:09,650 INFO L87 Difference]: Start difference. First operand 7676 states and 10225 transitions. Second operand has 44 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 40 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:14,710 INFO L93 Difference]: Finished difference Result 11180 states and 14877 transitions. [2023-04-03 02:33:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-03 02:33:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 40 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:33:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:14,719 INFO L225 Difference]: With dead ends: 11180 [2023-04-03 02:33:14,720 INFO L226 Difference]: Without dead ends: 7636 [2023-04-03 02:33:14,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1361, Invalid=7759, Unknown=0, NotChecked=0, Total=9120 [2023-04-03 02:33:14,727 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 14 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 3151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:14,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 206 Invalid, 3154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3151 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-03 02:33:14,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2023-04-03 02:33:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 7633. [2023-04-03 02:33:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7633 states, 7629 states have (on average 1.3325468606632587) internal successors, (10166), 7629 states have internal predecessors, (10166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 10169 transitions. [2023-04-03 02:33:16,325 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 10169 transitions. Word has length 75 [2023-04-03 02:33:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:16,325 INFO L495 AbstractCegarLoop]: Abstraction has 7633 states and 10169 transitions. [2023-04-03 02:33:16,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 40 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 10169 transitions. [2023-04-03 02:33:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:33:16,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:16,327 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:33:16,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-03 02:33:16,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:16,534 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:16,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash -485706907, now seen corresponding path program 1 times [2023-04-03 02:33:16,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:16,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932122596] [2023-04-03 02:33:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:16,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:17,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:17,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932122596] [2023-04-03 02:33:17,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932122596] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:33:17,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958472564] [2023-04-03 02:33:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:17,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:17,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:17,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:33:17,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:33:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:17,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-03 02:33:17,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:33:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:19,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:33:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:28,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958472564] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:33:28,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998557500] [2023-04-03 02:33:28,940 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-04-03 02:33:28,940 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:33:28,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:33:28,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:33:28,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:33:29,204 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 128 for LOIs [2023-04-03 02:33:31,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 109 for LOIs [2023-04-03 02:33:31,506 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:33:44,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1998557500] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:44,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:33:44,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [24, 20, 15] total 91 [2023-04-03 02:33:44,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298330426] [2023-04-03 02:33:44,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:44,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-03 02:33:44,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-03 02:33:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=6947, Unknown=0, NotChecked=0, Total=8190 [2023-04-03 02:33:44,986 INFO L87 Difference]: Start difference. First operand 7633 states and 10169 transitions. Second operand has 39 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:49,644 INFO L93 Difference]: Finished difference Result 10164 states and 13561 transitions. [2023-04-03 02:33:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-03 02:33:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:33:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:49,654 INFO L225 Difference]: With dead ends: 10164 [2023-04-03 02:33:49,654 INFO L226 Difference]: Without dead ends: 7602 [2023-04-03 02:33:49,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3020 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=1270, Invalid=7102, Unknown=0, NotChecked=0, Total=8372 [2023-04-03 02:33:49,660 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 2701 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:49,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 165 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2701 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-03 02:33:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2023-04-03 02:33:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7602. [2023-04-03 02:33:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7602 states, 7598 states have (on average 1.3327191366148987) internal successors, (10126), 7598 states have internal predecessors, (10126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7602 states to 7602 states and 10129 transitions. [2023-04-03 02:33:51,246 INFO L78 Accepts]: Start accepts. Automaton has 7602 states and 10129 transitions. Word has length 75 [2023-04-03 02:33:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:51,246 INFO L495 AbstractCegarLoop]: Abstraction has 7602 states and 10129 transitions. [2023-04-03 02:33:51,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:51,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7602 states and 10129 transitions. [2023-04-03 02:33:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:33:51,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:51,248 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:33:51,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-03 02:33:51,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-04-03 02:33:51,455 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:51,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:51,455 INFO L85 PathProgramCache]: Analyzing trace with hash 859694926, now seen corresponding path program 1 times [2023-04-03 02:33:51,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:51,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723162877] [2023-04-03 02:33:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:51,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:33:51,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:51,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723162877] [2023-04-03 02:33:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723162877] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:33:51,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:33:51,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:33:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971688378] [2023-04-03 02:33:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:33:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:33:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:33:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:33:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:33:51,584 INFO L87 Difference]: Start difference. First operand 7602 states and 10129 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:33:54,957 INFO L93 Difference]: Finished difference Result 21195 states and 28419 transitions. [2023-04-03 02:33:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-03 02:33:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-03 02:33:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:33:54,975 INFO L225 Difference]: With dead ends: 21195 [2023-04-03 02:33:54,976 INFO L226 Difference]: Without dead ends: 14232 [2023-04-03 02:33:54,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-04-03 02:33:54,988 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 832 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:33:54,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 283 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:33:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2023-04-03 02:33:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 11341. [2023-04-03 02:33:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11341 states, 11337 states have (on average 1.3101349563376554) internal successors, (14853), 11337 states have internal predecessors, (14853), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11341 states to 11341 states and 14856 transitions. [2023-04-03 02:33:57,562 INFO L78 Accepts]: Start accepts. Automaton has 11341 states and 14856 transitions. Word has length 75 [2023-04-03 02:33:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:33:57,562 INFO L495 AbstractCegarLoop]: Abstraction has 11341 states and 14856 transitions. [2023-04-03 02:33:57,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:33:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 11341 states and 14856 transitions. [2023-04-03 02:33:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-03 02:33:57,564 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:33:57,564 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:33:57,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-03 02:33:57,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:33:57,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:33:57,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1382726857, now seen corresponding path program 1 times [2023-04-03 02:33:57,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:33:57,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115269394] [2023-04-03 02:33:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:57,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:33:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:58,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:33:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115269394] [2023-04-03 02:33:58,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115269394] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:33:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763268102] [2023-04-03 02:33:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:33:58,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:33:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:33:58,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:33:58,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:33:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:33:58,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-03 02:33:58,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:33:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:33:59,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:34:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:34:30,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763268102] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:34:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348521166] [2023-04-03 02:34:30,621 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-04-03 02:34:30,622 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:34:30,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:34:30,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:34:30,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:34:30,861 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 128 for LOIs [2023-04-03 02:34:34,919 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-03 02:34:41,080 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-03 02:34:41,372 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-03 02:34:44,225 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-03 02:34:44,722 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-03 02:34:57,149 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-03 02:34:57,288 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-03 02:34:57,432 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-03 02:34:57,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 109 for LOIs [2023-04-03 02:34:57,597 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:35:14,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '403333#(and (= main_~__tmp_3~0 main_~assert__arg~2) (= main_~__tmp_3~0 0) (= main_~main__c1~0 0) (= ~nomsg~0 ~p2_new~0) (<= 0 (+ main_~main__c1~0 ~mode3~0)) (= ~p3_new~0 ~p1_new~0) (= ~__return_6554~0 main_~check__tmp~2) (= main_~main__c1~0 main_~check__tmp~2) (<= ~mode3~0 (+ main_~main__c1~0 1)) (= ~p3_new~0 ~p2_new~0))' at error location [2023-04-03 02:35:14,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:35:14,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:35:14,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 18] total 48 [2023-04-03 02:35:14,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917261147] [2023-04-03 02:35:14,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:35:14,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-03 02:35:14,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:14,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-03 02:35:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1252, Invalid=9254, Unknown=0, NotChecked=0, Total=10506 [2023-04-03 02:35:14,783 INFO L87 Difference]: Start difference. First operand 11341 states and 14856 transitions. Second operand has 48 states, 48 states have (on average 4.416666666666667) internal successors, (212), 48 states have internal predecessors, (212), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:35:43,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:43,267 INFO L93 Difference]: Finished difference Result 39826 states and 52440 transitions. [2023-04-03 02:35:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-04-03 02:35:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.416666666666667) internal successors, (212), 48 states have internal predecessors, (212), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2023-04-03 02:35:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:43,314 INFO L225 Difference]: With dead ends: 39826 [2023-04-03 02:35:43,314 INFO L226 Difference]: Without dead ends: 31757 [2023-04-03 02:35:43,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17190 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=4478, Invalid=38164, Unknown=0, NotChecked=0, Total=42642 [2023-04-03 02:35:43,332 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 3321 mSDsluCounter, 3914 mSDsCounter, 0 mSdLazyCounter, 7408 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3321 SdHoareTripleChecker+Valid, 4091 SdHoareTripleChecker+Invalid, 7612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 7408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:43,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3321 Valid, 4091 Invalid, 7612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 7408 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-03 02:35:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31757 states. [2023-04-03 02:35:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31757 to 12991. [2023-04-03 02:35:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12987 states have (on average 1.300916300916301) internal successors, (16895), 12987 states have internal predecessors, (16895), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 16898 transitions. [2023-04-03 02:35:48,304 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 16898 transitions. Word has length 75 [2023-04-03 02:35:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:35:48,304 INFO L495 AbstractCegarLoop]: Abstraction has 12991 states and 16898 transitions. [2023-04-03 02:35:48,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.416666666666667) internal successors, (212), 48 states have internal predecessors, (212), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-03 02:35:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 16898 transitions. [2023-04-03 02:35:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:35:48,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:35:48,322 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:35:48,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-03 02:35:48,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:35:48,532 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:35:48,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:35:48,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1271429200, now seen corresponding path program 1 times [2023-04-03 02:35:48,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:35:48,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763112540] [2023-04-03 02:35:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:35:48,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:35:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:35:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:35:48,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:35:48,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763112540] [2023-04-03 02:35:48,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763112540] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:35:48,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:35:48,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:35:48,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763192424] [2023-04-03 02:35:48,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:35:48,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:35:48,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:35:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:35:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:48,610 INFO L87 Difference]: Start difference. First operand 12991 states and 16898 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:35:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:35:54,802 INFO L93 Difference]: Finished difference Result 20263 states and 26433 transitions. [2023-04-03 02:35:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:35:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:35:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:35:54,828 INFO L225 Difference]: With dead ends: 20263 [2023-04-03 02:35:54,829 INFO L226 Difference]: Without dead ends: 14943 [2023-04-03 02:35:54,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:35:54,840 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:35:54,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 282 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:35:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14943 states. [2023-04-03 02:36:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14943 to 13368. [2023-04-03 02:36:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13368 states, 13364 states have (on average 1.2915294821909609) internal successors, (17260), 13364 states have internal predecessors, (17260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 17263 transitions. [2023-04-03 02:36:00,238 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 17263 transitions. Word has length 77 [2023-04-03 02:36:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:36:00,238 INFO L495 AbstractCegarLoop]: Abstraction has 13368 states and 17263 transitions. [2023-04-03 02:36:00,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 17263 transitions. [2023-04-03 02:36:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:36:00,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:36:00,258 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:36:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-03 02:36:00,258 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:36:00,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:36:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1268984553, now seen corresponding path program 1 times [2023-04-03 02:36:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:36:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224799362] [2023-04-03 02:36:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:36:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:36:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:36:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-03 02:36:00,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:36:00,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224799362] [2023-04-03 02:36:00,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224799362] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:36:00,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:36:00,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:36:00,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693877081] [2023-04-03 02:36:00,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:36:00,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:36:00,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:36:00,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:36:00,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:00,328 INFO L87 Difference]: Start difference. First operand 13368 states and 17263 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:36:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:36:05,476 INFO L93 Difference]: Finished difference Result 15900 states and 20507 transitions. [2023-04-03 02:36:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:36:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-03 02:36:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:36:05,492 INFO L225 Difference]: With dead ends: 15900 [2023-04-03 02:36:05,492 INFO L226 Difference]: Without dead ends: 12850 [2023-04-03 02:36:05,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:36:05,499 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 74 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:36:05,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 253 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:36:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12850 states.