/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:21:07,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:21:07,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:21:07,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:21:07,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:21:07,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:21:07,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:21:07,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:21:07,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:21:07,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:21:07,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:21:07,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:21:07,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:21:07,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:21:07,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:21:07,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:21:07,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:21:07,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:21:07,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:21:07,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:21:07,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:21:07,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:21:07,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:21:07,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:21:07,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:21:07,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:21:07,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:21:07,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:21:07,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:21:07,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:21:07,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:21:07,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:21:07,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:21:07,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:21:07,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:21:07,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:21:07,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:21:07,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:21:07,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:21:07,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:21:07,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:21:07,141 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 02:21:07,170 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:21:07,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:21:07,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:21:07,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:21:07,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:21:07,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:21:07,172 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:21:07,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:21:07,172 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:21:07,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:21:07,173 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:21:07,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:21:07,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:21:07,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:21:07,174 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:21:07,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:21:07,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:21:07,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:21:07,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:21:07,175 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:21:07,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:21:07,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:21:07,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:21:07,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:21:07,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:21:07,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:21:07,176 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:21:07,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:21:07,176 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:21:07,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:21:07,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:21:07,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:21:07,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:21:07,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:21:07,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:21:07,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:21:07,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:21:07,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:21:07,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:21:07,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:21:07,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:21:07,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:21:07,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:21:07,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:21:07,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:21:07,441 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:21:07,441 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:21:07,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:21:08,798 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:21:08,992 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:21:08,993 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:21:09,003 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9fcef593/59a260acdd51408f8ed6893d897566ec/FLAG388ac5490 [2023-04-03 02:21:09,020 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9fcef593/59a260acdd51408f8ed6893d897566ec [2023-04-03 02:21:09,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:21:09,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:21:09,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:09,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:21:09,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:21:09,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e95fdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09, skipping insertion in model container [2023-04-03 02:21:09,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:21:09,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:21:09,248 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-04-03 02:21:09,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:09,293 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:21:09,350 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-04-03 02:21:09,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:09,395 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:21:09,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09 WrapperNode [2023-04-03 02:21:09,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:09,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:21:09,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:21:09,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:21:09,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:21:09,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:21:09,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:21:09,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:21:09,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (1/1) ... [2023-04-03 02:21:09,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:21:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:09,536 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 02:21:09,558 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 02:21:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:21:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:21:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:21:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:21:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:21:09,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:21:09,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:21:09,574 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:21:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:21:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:21:09,758 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:21:09,760 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:21:10,364 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:21:10,512 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:21:10,513 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:21:10,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:10 BoogieIcfgContainer [2023-04-03 02:21:10,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:21:10,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:21:10,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:21:10,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:21:10,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:21:09" (1/3) ... [2023-04-03 02:21:10,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596c9e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:10, skipping insertion in model container [2023-04-03 02:21:10,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:09" (2/3) ... [2023-04-03 02:21:10,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596c9e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:10, skipping insertion in model container [2023-04-03 02:21:10,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:10" (3/3) ... [2023-04-03 02:21:10,524 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:21:10,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:21:10,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:21:10,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:21:10,601 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;@1a7c71ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:21:10,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:21:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 87 states have (on average 1.7586206896551724) internal successors, (153), 94 states have internal predecessors, (153), 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 02:21:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:21:10,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:10,617 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] [2023-04-03 02:21:10,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:10,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash -459980442, now seen corresponding path program 1 times [2023-04-03 02:21:10,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:10,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327240538] [2023-04-03 02:21:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:10,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:11,074 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 02:21:11,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:11,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327240538] [2023-04-03 02:21:11,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327240538] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:11,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:11,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714129874] [2023-04-03 02:21:11,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:11,111 INFO L87 Difference]: Start difference. First operand has 99 states, 87 states have (on average 1.7586206896551724) internal successors, (153), 94 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 02:21:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:11,243 INFO L93 Difference]: Finished difference Result 219 states and 330 transitions. [2023-04-03 02:21:11,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:11,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 42 [2023-04-03 02:21:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:11,257 INFO L225 Difference]: With dead ends: 219 [2023-04-03 02:21:11,257 INFO L226 Difference]: Without dead ends: 133 [2023-04-03 02:21:11,261 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 02:21:11,267 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 97 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:11,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 338 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-04-03 02:21:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2023-04-03 02:21:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.4094488188976377) internal successors, (179), 127 states have internal predecessors, (179), 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 02:21:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 182 transitions. [2023-04-03 02:21:11,341 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 182 transitions. Word has length 42 [2023-04-03 02:21:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:11,341 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 182 transitions. [2023-04-03 02:21:11,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 02:21:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 182 transitions. [2023-04-03 02:21:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-03 02:21:11,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:11,343 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] [2023-04-03 02:21:11,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:21:11,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:11,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash -893402332, now seen corresponding path program 1 times [2023-04-03 02:21:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840026848] [2023-04-03 02:21:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:11,610 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 02:21:11,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:11,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840026848] [2023-04-03 02:21:11,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840026848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:11,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:11,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:11,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871591631] [2023-04-03 02:21:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:11,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:11,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:11,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:11,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:11,615 INFO L87 Difference]: Start difference. First operand 131 states and 182 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 02:21:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:11,719 INFO L93 Difference]: Finished difference Result 286 states and 417 transitions. [2023-04-03 02:21:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:11,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 44 [2023-04-03 02:21:11,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:11,723 INFO L225 Difference]: With dead ends: 286 [2023-04-03 02:21:11,723 INFO L226 Difference]: Without dead ends: 188 [2023-04-03 02:21:11,724 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 02:21:11,725 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 79 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:11,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 188 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-04-03 02:21:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-04-03 02:21:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.4285714285714286) internal successors, (260), 182 states have internal predecessors, (260), 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 02:21:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 263 transitions. [2023-04-03 02:21:11,749 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 263 transitions. Word has length 44 [2023-04-03 02:21:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:11,749 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 263 transitions. [2023-04-03 02:21:11,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 02:21:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 263 transitions. [2023-04-03 02:21:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 02:21:11,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:11,751 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 02:21:11,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:21:11,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:11,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:11,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2072365937, now seen corresponding path program 1 times [2023-04-03 02:21:11,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:11,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691946255] [2023-04-03 02:21:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:11,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:11,880 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 02:21:11,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:11,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691946255] [2023-04-03 02:21:11,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691946255] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:11,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:11,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:11,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377798476] [2023-04-03 02:21:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:11,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:11,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:11,885 INFO L87 Difference]: Start difference. First operand 186 states and 263 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 02:21:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:11,948 INFO L93 Difference]: Finished difference Result 452 states and 662 transitions. [2023-04-03 02:21:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 02:21:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:11,953 INFO L225 Difference]: With dead ends: 452 [2023-04-03 02:21:11,953 INFO L226 Difference]: Without dead ends: 301 [2023-04-03 02:21:11,960 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 02:21:11,962 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 79 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:11,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 237 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-03 02:21:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2023-04-03 02:21:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 295 states have (on average 1.4474576271186441) internal successors, (427), 295 states have internal predecessors, (427), 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 02:21:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 430 transitions. [2023-04-03 02:21:12,015 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 430 transitions. Word has length 46 [2023-04-03 02:21:12,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:12,015 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 430 transitions. [2023-04-03 02:21:12,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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 02:21:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 430 transitions. [2023-04-03 02:21:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 02:21:12,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:12,020 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 02:21:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:21:12,020 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:12,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash 460054954, now seen corresponding path program 1 times [2023-04-03 02:21:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:12,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896366215] [2023-04-03 02:21:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:12,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:12,133 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 02:21:12,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896366215] [2023-04-03 02:21:12,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896366215] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:12,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:12,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926265530] [2023-04-03 02:21:12,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:12,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:12,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:12,136 INFO L87 Difference]: Start difference. First operand 299 states and 430 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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 02:21:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:12,199 INFO L93 Difference]: Finished difference Result 727 states and 1072 transitions. [2023-04-03 02:21:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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 02:21:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:12,204 INFO L225 Difference]: With dead ends: 727 [2023-04-03 02:21:12,205 INFO L226 Difference]: Without dead ends: 463 [2023-04-03 02:21:12,207 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 02:21:12,216 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 78 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:12,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 205 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:12,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-04-03 02:21:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2023-04-03 02:21:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 457 states have (on average 1.4660831509846828) internal successors, (670), 457 states have internal predecessors, (670), 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 02:21:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 673 transitions. [2023-04-03 02:21:12,260 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 673 transitions. Word has length 48 [2023-04-03 02:21:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:12,261 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 673 transitions. [2023-04-03 02:21:12,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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 02:21:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 673 transitions. [2023-04-03 02:21:12,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:21:12,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:12,263 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 02:21:12,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:21:12,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:12,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2112125181, now seen corresponding path program 1 times [2023-04-03 02:21:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:12,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4390649] [2023-04-03 02:21:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:12,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:12,389 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 02:21:12,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:12,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4390649] [2023-04-03 02:21:12,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4390649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:12,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:12,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7241555] [2023-04-03 02:21:12,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:12,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:12,391 INFO L87 Difference]: Start difference. First operand 461 states and 673 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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 02:21:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:12,540 INFO L93 Difference]: Finished difference Result 1179 states and 1740 transitions. [2023-04-03 02:21:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:12,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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 02:21:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:12,549 INFO L225 Difference]: With dead ends: 1179 [2023-04-03 02:21:12,549 INFO L226 Difference]: Without dead ends: 766 [2023-04-03 02:21:12,550 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 02:21:12,551 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 74 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:12,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 218 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2023-04-03 02:21:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 764. [2023-04-03 02:21:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 760 states have (on average 1.4578947368421054) internal successors, (1108), 760 states have internal predecessors, (1108), 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 02:21:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1111 transitions. [2023-04-03 02:21:12,645 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1111 transitions. Word has length 50 [2023-04-03 02:21:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:12,646 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1111 transitions. [2023-04-03 02:21:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 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 02:21:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1111 transitions. [2023-04-03 02:21:12,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:21:12,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:12,649 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 02:21:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:21:12,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:12,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -76941885, now seen corresponding path program 1 times [2023-04-03 02:21:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122886094] [2023-04-03 02:21:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:12,761 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 02:21:12,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122886094] [2023-04-03 02:21:12,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122886094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:12,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:12,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990568999] [2023-04-03 02:21:12,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:12,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:12,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:12,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:12,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:12,764 INFO L87 Difference]: Start difference. First operand 764 states and 1111 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:21:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:12,912 INFO L93 Difference]: Finished difference Result 1906 states and 2806 transitions. [2023-04-03 02:21:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-03 02:21:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:12,918 INFO L225 Difference]: With dead ends: 1906 [2023-04-03 02:21:12,918 INFO L226 Difference]: Without dead ends: 1190 [2023-04-03 02:21:12,920 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 02:21:12,921 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 73 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:12,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 207 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-04-03 02:21:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1188. [2023-04-03 02:21:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1184 states have (on average 1.4662162162162162) internal successors, (1736), 1184 states have internal predecessors, (1736), 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 02:21:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1739 transitions. [2023-04-03 02:21:13,024 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1739 transitions. Word has length 52 [2023-04-03 02:21:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:13,025 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1739 transitions. [2023-04-03 02:21:13,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 02:21:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1739 transitions. [2023-04-03 02:21:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:21:13,025 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:13,025 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] [2023-04-03 02:21:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:21:13,026 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:13,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1504811696, now seen corresponding path program 1 times [2023-04-03 02:21:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122306177] [2023-04-03 02:21:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:13,158 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 02:21:13,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:13,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122306177] [2023-04-03 02:21:13,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122306177] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:13,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:13,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220926114] [2023-04-03 02:21:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:13,160 INFO L87 Difference]: Start difference. First operand 1188 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 02:21:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:13,514 INFO L93 Difference]: Finished difference Result 3016 states and 4445 transitions. [2023-04-03 02:21:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:21:13,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 54 [2023-04-03 02:21:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:13,523 INFO L225 Difference]: With dead ends: 3016 [2023-04-03 02:21:13,524 INFO L226 Difference]: Without dead ends: 1871 [2023-04-03 02:21:13,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:21:13,527 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 439 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:13,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 817 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2023-04-03 02:21:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1845. [2023-04-03 02:21:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1841 states have (on average 1.4725692558392178) internal successors, (2711), 1841 states have internal predecessors, (2711), 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 02:21:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2714 transitions. [2023-04-03 02:21:13,711 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2714 transitions. Word has length 54 [2023-04-03 02:21:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:13,713 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2714 transitions. [2023-04-03 02:21:13,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 02:21:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2714 transitions. [2023-04-03 02:21:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:21:13,714 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:13,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:13,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:21:13,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:13,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash 533867218, now seen corresponding path program 1 times [2023-04-03 02:21:13,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:13,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068207929] [2023-04-03 02:21:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:13,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:13,843 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 02:21:13,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:13,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068207929] [2023-04-03 02:21:13,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068207929] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:13,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:13,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:21:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883175915] [2023-04-03 02:21:13,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:21:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:21:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:21:13,846 INFO L87 Difference]: Start difference. First operand 1845 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 02:21:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:14,099 INFO L93 Difference]: Finished difference Result 3631 states and 5356 transitions. [2023-04-03 02:21:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:21:14,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 55 [2023-04-03 02:21:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:14,107 INFO L225 Difference]: With dead ends: 3631 [2023-04-03 02:21:14,107 INFO L226 Difference]: Without dead ends: 1847 [2023-04-03 02:21:14,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:14,112 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 145 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:14,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 302 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2023-04-03 02:21:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1842. [2023-04-03 02:21:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1838 states have (on average 1.4668117519042438) internal successors, (2696), 1838 states have internal predecessors, (2696), 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 02:21:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2699 transitions. [2023-04-03 02:21:14,283 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2699 transitions. Word has length 55 [2023-04-03 02:21:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:14,283 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2699 transitions. [2023-04-03 02:21:14,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 02:21:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2699 transitions. [2023-04-03 02:21:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:21:14,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:14,284 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] [2023-04-03 02:21:14,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:21:14,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:14,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash 339509606, now seen corresponding path program 1 times [2023-04-03 02:21:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549119027] [2023-04-03 02:21:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:14,568 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 02:21:14,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549119027] [2023-04-03 02:21:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549119027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:14,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435673743] [2023-04-03 02:21:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:14,590 INFO L87 Difference]: Start difference. First operand 1842 states and 2699 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 02:21:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:14,911 INFO L93 Difference]: Finished difference Result 3032 states and 4396 transitions. [2023-04-03 02:21:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:21:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 63 [2023-04-03 02:21:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:14,924 INFO L225 Difference]: With dead ends: 3032 [2023-04-03 02:21:14,925 INFO L226 Difference]: Without dead ends: 3030 [2023-04-03 02:21:14,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-03 02:21:14,930 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 148 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:14,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 588 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2023-04-03 02:21:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 1886. [2023-04-03 02:21:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1882 states have (on average 1.4436769394261424) internal successors, (2717), 1882 states have internal predecessors, (2717), 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 02:21:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2720 transitions. [2023-04-03 02:21:15,215 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2720 transitions. Word has length 63 [2023-04-03 02:21:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:15,215 INFO L495 AbstractCegarLoop]: Abstraction has 1886 states and 2720 transitions. [2023-04-03 02:21:15,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 02:21:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2720 transitions. [2023-04-03 02:21:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:21:15,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:15,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:15,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:21:15,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:15,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1480269234, now seen corresponding path program 1 times [2023-04-03 02:21:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:15,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756497284] [2023-04-03 02:21:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:15,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:16,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756497284] [2023-04-03 02:21:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756497284] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444267678] [2023-04-03 02:21:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:16,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:16,342 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 02:21:16,343 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 02:21:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:16,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:16,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:21:17,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:17,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444267678] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:17,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:17,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232604627] [2023-04-03 02:21:17,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:17,018 INFO L87 Difference]: Start difference. First operand 1886 states and 2720 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 02:21:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:17,699 INFO L93 Difference]: Finished difference Result 5427 states and 7848 transitions. [2023-04-03 02:21:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 71 [2023-04-03 02:21:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:17,716 INFO L225 Difference]: With dead ends: 5427 [2023-04-03 02:21:17,716 INFO L226 Difference]: Without dead ends: 3587 [2023-04-03 02:21:17,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:17,723 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 261 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:17,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 300 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2023-04-03 02:21:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 3585. [2023-04-03 02:21:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3581 states have (on average 1.4353532532812063) internal successors, (5140), 3581 states have internal predecessors, (5140), 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 02:21:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5143 transitions. [2023-04-03 02:21:18,322 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5143 transitions. Word has length 71 [2023-04-03 02:21:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:18,322 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 5143 transitions. [2023-04-03 02:21:18,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 02:21:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5143 transitions. [2023-04-03 02:21:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:21:18,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:18,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:18,336 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 02:21:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 02:21:18,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:18,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2075950183, now seen corresponding path program 1 times [2023-04-03 02:21:18,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:18,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768079847] [2023-04-03 02:21:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:18,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:19,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:19,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768079847] [2023-04-03 02:21:19,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768079847] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:19,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036737885] [2023-04-03 02:21:19,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:19,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:19,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:19,516 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 02:21:19,540 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 02:21:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:19,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:19,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:21:20,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036737885] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:20,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484826590] [2023-04-03 02:21:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:20,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:20,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:20,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:20,053 INFO L87 Difference]: Start difference. First operand 3585 states and 5143 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 02:21:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:21,263 INFO L93 Difference]: Finished difference Result 10379 states and 14903 transitions. [2023-04-03 02:21:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 74 [2023-04-03 02:21:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:21,295 INFO L225 Difference]: With dead ends: 10379 [2023-04-03 02:21:21,295 INFO L226 Difference]: Without dead ends: 6867 [2023-04-03 02:21:21,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:21,305 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 251 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:21,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 302 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2023-04-03 02:21:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 6865. [2023-04-03 02:21:22,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6865 states, 6861 states have (on average 1.4264684448331146) internal successors, (9787), 6861 states have internal predecessors, (9787), 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 02:21:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6865 states to 6865 states and 9790 transitions. [2023-04-03 02:21:22,552 INFO L78 Accepts]: Start accepts. Automaton has 6865 states and 9790 transitions. Word has length 74 [2023-04-03 02:21:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:22,552 INFO L495 AbstractCegarLoop]: Abstraction has 6865 states and 9790 transitions. [2023-04-03 02:21:22,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 02:21:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 6865 states and 9790 transitions. [2023-04-03 02:21:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:21:22,554 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:22,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:22,565 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 02:21:22,762 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,SelfDestructingSolverStorable10 [2023-04-03 02:21:22,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:22,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:22,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1387617010, now seen corresponding path program 1 times [2023-04-03 02:21:22,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:22,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721314247] [2023-04-03 02:21:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:23,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:23,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721314247] [2023-04-03 02:21:23,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721314247] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:23,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50713389] [2023-04-03 02:21:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:23,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:23,715 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 02:21:23,718 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 02:21:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:23,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:23,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:21:24,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50713389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:24,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:24,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:24,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518087576] [2023-04-03 02:21:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:24,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:24,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:24,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:24,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:24,316 INFO L87 Difference]: Start difference. First operand 6865 states and 9790 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 02:21:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:26,780 INFO L93 Difference]: Finished difference Result 20029 states and 28568 transitions. [2023-04-03 02:21:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:26,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 02:21:26,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:26,838 INFO L225 Difference]: With dead ends: 20029 [2023-04-03 02:21:26,838 INFO L226 Difference]: Without dead ends: 13247 [2023-04-03 02:21:26,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:26,856 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 305 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:26,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 262 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13247 states. [2023-04-03 02:21:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13247 to 13245. [2023-04-03 02:21:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13245 states, 13241 states have (on average 1.4179442640283966) internal successors, (18775), 13241 states have internal predecessors, (18775), 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 02:21:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13245 states to 13245 states and 18778 transitions. [2023-04-03 02:21:28,976 INFO L78 Accepts]: Start accepts. Automaton has 13245 states and 18778 transitions. Word has length 77 [2023-04-03 02:21:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:28,977 INFO L495 AbstractCegarLoop]: Abstraction has 13245 states and 18778 transitions. [2023-04-03 02:21:28,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 02:21:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13245 states and 18778 transitions. [2023-04-03 02:21:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:21:28,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:28,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:28,987 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 02:21:29,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:29,187 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:29,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash -698073172, now seen corresponding path program 1 times [2023-04-03 02:21:29,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:29,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742473955] [2023-04-03 02:21:29,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:29,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:21:29,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742473955] [2023-04-03 02:21:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742473955] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:29,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:29,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308832070] [2023-04-03 02:21:29,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:29,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:29,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:29,367 INFO L87 Difference]: Start difference. First operand 13245 states and 18778 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 02:21:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:31,498 INFO L93 Difference]: Finished difference Result 26407 states and 37455 transitions. [2023-04-03 02:21:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 80 [2023-04-03 02:21:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:31,537 INFO L225 Difference]: With dead ends: 26407 [2023-04-03 02:21:31,537 INFO L226 Difference]: Without dead ends: 13245 [2023-04-03 02:21:31,565 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 02:21:31,565 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 261 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:31,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 109 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2023-04-03 02:21:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 13245. [2023-04-03 02:21:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13245 states, 13241 states have (on average 1.3952873650026434) internal successors, (18475), 13241 states have internal predecessors, (18475), 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 02:21:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13245 states to 13245 states and 18478 transitions. [2023-04-03 02:21:33,684 INFO L78 Accepts]: Start accepts. Automaton has 13245 states and 18478 transitions. Word has length 80 [2023-04-03 02:21:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 13245 states and 18478 transitions. [2023-04-03 02:21:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 02:21:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13245 states and 18478 transitions. [2023-04-03 02:21:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:21:33,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:33,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:33,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:21:33,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:33,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1663525103, now seen corresponding path program 1 times [2023-04-03 02:21:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:33,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386657195] [2023-04-03 02:21:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:33,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:34,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386657195] [2023-04-03 02:21:34,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386657195] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:34,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936813332] [2023-04-03 02:21:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:34,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:34,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:34,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:34,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 02:21:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:34,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 02:21:34,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:21:35,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:35,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936813332] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:35,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:35,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-03 02:21:35,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670883162] [2023-04-03 02:21:35,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:35,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:21:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:35,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:21:35,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:21:35,494 INFO L87 Difference]: Start difference. First operand 13245 states and 18478 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 02:21:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:37,343 INFO L93 Difference]: Finished difference Result 23433 states and 32640 transitions. [2023-04-03 02:21:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 80 [2023-04-03 02:21:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:37,370 INFO L225 Difference]: With dead ends: 23433 [2023-04-03 02:21:37,371 INFO L226 Difference]: Without dead ends: 10269 [2023-04-03 02:21:37,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-04-03 02:21:37,396 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 369 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:37,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 246 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10269 states. [2023-04-03 02:21:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10269 to 10208. [2023-04-03 02:21:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10208 states, 10204 states have (on average 1.3913171305370442) internal successors, (14197), 10204 states have internal predecessors, (14197), 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 02:21:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 14200 transitions. [2023-04-03 02:21:39,119 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 14200 transitions. Word has length 80 [2023-04-03 02:21:39,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:39,120 INFO L495 AbstractCegarLoop]: Abstraction has 10208 states and 14200 transitions. [2023-04-03 02:21:39,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 02:21:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 14200 transitions. [2023-04-03 02:21:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:21:39,121 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:39,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:39,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 02:21:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:39,330 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:39,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1138577146, now seen corresponding path program 1 times [2023-04-03 02:21:39,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:39,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243837679] [2023-04-03 02:21:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:21:39,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:39,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243837679] [2023-04-03 02:21:39,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243837679] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:39,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:39,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951609640] [2023-04-03 02:21:39,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:39,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:39,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:39,450 INFO L87 Difference]: Start difference. First operand 10208 states and 14200 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 02:21:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:41,276 INFO L93 Difference]: Finished difference Result 20356 states and 28328 transitions. [2023-04-03 02:21:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 80 [2023-04-03 02:21:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:41,301 INFO L225 Difference]: With dead ends: 20356 [2023-04-03 02:21:41,301 INFO L226 Difference]: Without dead ends: 10208 [2023-04-03 02:21:41,326 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 02:21:41,327 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 265 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:41,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 107 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10208 states. [2023-04-03 02:21:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10208 to 10208. [2023-04-03 02:21:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10208 states, 10204 states have (on average 1.3625049000392002) internal successors, (13903), 10204 states have internal predecessors, (13903), 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 02:21:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 13906 transitions. [2023-04-03 02:21:43,130 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 13906 transitions. Word has length 80 [2023-04-03 02:21:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:43,130 INFO L495 AbstractCegarLoop]: Abstraction has 10208 states and 13906 transitions. [2023-04-03 02:21:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 02:21:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 13906 transitions. [2023-04-03 02:21:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:21:43,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:43,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:43,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:21:43,132 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:43,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash 981629279, now seen corresponding path program 1 times [2023-04-03 02:21:43,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:43,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234187339] [2023-04-03 02:21:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:43,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:43,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:43,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234187339] [2023-04-03 02:21:43,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234187339] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:43,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650478907] [2023-04-03 02:21:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:43,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:43,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:43,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:43,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 02:21:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:44,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 02:21:44,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:21:44,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650478907] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:44,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-03 02:21:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232436399] [2023-04-03 02:21:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:44,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:21:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:21:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:21:44,657 INFO L87 Difference]: Start difference. First operand 10208 states and 13906 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 02:21:48,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:48,026 INFO L93 Difference]: Finished difference Result 25309 states and 34406 transitions. [2023-04-03 02:21:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:21:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 80 [2023-04-03 02:21:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:48,065 INFO L225 Difference]: With dead ends: 25309 [2023-04-03 02:21:48,066 INFO L226 Difference]: Without dead ends: 20094 [2023-04-03 02:21:48,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:21:48,080 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 474 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:48,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 317 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20094 states. [2023-04-03 02:21:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20094 to 15140. [2023-04-03 02:21:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15140 states, 15136 states have (on average 1.3516120507399578) internal successors, (20458), 15136 states have internal predecessors, (20458), 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 02:21:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15140 states to 15140 states and 20461 transitions. [2023-04-03 02:21:50,847 INFO L78 Accepts]: Start accepts. Automaton has 15140 states and 20461 transitions. Word has length 80 [2023-04-03 02:21:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:50,848 INFO L495 AbstractCegarLoop]: Abstraction has 15140 states and 20461 transitions. [2023-04-03 02:21:50,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 02:21:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 15140 states and 20461 transitions. [2023-04-03 02:21:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:21:50,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:50,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:50,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-03 02:21:51,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-03 02:21:51,059 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:51,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash 355102993, now seen corresponding path program 1 times [2023-04-03 02:21:51,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924989118] [2023-04-03 02:21:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:51,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:51,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924989118] [2023-04-03 02:21:51,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924989118] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:51,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438680597] [2023-04-03 02:21:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:51,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:51,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:51,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:51,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 02:21:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:52,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-03 02:21:52,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:52,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:21:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438680597] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:21:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528368313] [2023-04-03 02:21:56,575 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2023-04-03 02:21:56,575 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:21:56,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:21:56,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:21:56,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:21:57,576 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs