/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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:20:59,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:20:59,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:20:59,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:20:59,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:20:59,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:20:59,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:20:59,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:20:59,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:20:59,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:20:59,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:20:59,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:20:59,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:20:59,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:20:59,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:20:59,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:20:59,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:20:59,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:20:59,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:20:59,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:20:59,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:20:59,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:20:59,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:20:59,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:20:59,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:20:59,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:20:59,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:20:59,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:20:59,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:20:59,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:20:59,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:20:59,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:20:59,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:20:59,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:20:59,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:20:59,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:20:59,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:20:59,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:20:59,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:20:59,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:20:59,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:20:59,304 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 02:20:59,327 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:20:59,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:20:59,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:20:59,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:20:59,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:20:59,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:20:59,329 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:20:59,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:20:59,329 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:20:59,329 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:20:59,330 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:20:59,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:20:59,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:20:59,330 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:20:59,330 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:20:59,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:20:59,330 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:20:59,330 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:20:59,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:20:59,331 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:20:59,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:20:59,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:20:59,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:20:59,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:20:59,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:20:59,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:20:59,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:20:59,332 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:20:59,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:20:59,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:20:59,333 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:20:59,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:20:59,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:20:59,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:20:59,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:20:59,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:20:59,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:20:59,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:20:59,495 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:20:59,495 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:20:59,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:21:00,509 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:21:00,784 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:21:00,784 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:21:00,796 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1988587e/e8ce004e1b89489187786f4225df6416/FLAG22a2e1e0a [2023-04-03 02:21:00,813 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1988587e/e8ce004e1b89489187786f4225df6416 [2023-04-03 02:21:00,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:21:00,817 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:21:00,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:00,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:21:00,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:21:00,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:00" (1/1) ... [2023-04-03 02:21:00,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387675cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:00, skipping insertion in model container [2023-04-03 02:21:00,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:00" (1/1) ... [2023-04-03 02:21:00,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:21:00,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:21:01,042 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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2023-04-03 02:21:01,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:01,083 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:21:01,114 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.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2023-04-03 02:21:01,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:01,144 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:21:01,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01 WrapperNode [2023-04-03 02:21:01,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:01,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:21:01,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:21:01,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:21:01,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,182 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:21:01,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:21:01,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:21:01,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:21:01,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (1/1) ... [2023-04-03 02:21:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:21:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:01,225 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 02:21:01,237 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 02:21:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:21:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:21:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:21:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:21:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:21:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:21:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:21:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:21:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:21:01,258 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:21:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:21:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:21:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:21:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:21:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:21:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:21:01,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:21:01,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:21:01,345 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:21:01,346 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:21:01,752 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:21:02,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:21:02,014 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:21:02,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:02 BoogieIcfgContainer [2023-04-03 02:21:02,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:21:02,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:21:02,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:21:02,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:21:02,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:21:00" (1/3) ... [2023-04-03 02:21:02,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342712c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:02, skipping insertion in model container [2023-04-03 02:21:02,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:01" (2/3) ... [2023-04-03 02:21:02,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342712c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:02, skipping insertion in model container [2023-04-03 02:21:02,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:02" (3/3) ... [2023-04-03 02:21:02,022 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-03 02:21:02,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:21:02,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:21:02,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:21:02,077 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;@7d3f8d6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:21:02,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:21:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 80 states have (on average 1.7375) internal successors, (139), 87 states have internal predecessors, (139), 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 02:21:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 02:21:02,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:02,087 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] [2023-04-03 02:21:02,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:02,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1595779140, now seen corresponding path program 1 times [2023-04-03 02:21:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:02,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201580238] [2023-04-03 02:21:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:02,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:02,366 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 02:21:02,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:02,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201580238] [2023-04-03 02:21:02,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201580238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:02,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:02,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:02,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671088596] [2023-04-03 02:21:02,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:02,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:02,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:02,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:02,392 INFO L87 Difference]: Start difference. First operand has 92 states, 80 states have (on average 1.7375) internal successors, (139), 87 states have internal predecessors, (139), 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 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 02:21:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:02,497 INFO L93 Difference]: Finished difference Result 210 states and 312 transitions. [2023-04-03 02:21:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2023-04-03 02:21:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:02,507 INFO L225 Difference]: With dead ends: 210 [2023-04-03 02:21:02,507 INFO L226 Difference]: Without dead ends: 125 [2023-04-03 02:21:02,509 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 02:21:02,513 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 96 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:02,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 310 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-03 02:21:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2023-04-03 02:21:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.4369747899159664) internal successors, (171), 119 states have internal predecessors, (171), 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 02:21:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 174 transitions. [2023-04-03 02:21:02,563 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 174 transitions. Word has length 35 [2023-04-03 02:21:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:02,564 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 174 transitions. [2023-04-03 02:21:02,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 02:21:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 174 transitions. [2023-04-03 02:21:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-03 02:21:02,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:02,567 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] [2023-04-03 02:21:02,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:21:02,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:02,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:02,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1764899951, now seen corresponding path program 1 times [2023-04-03 02:21:02,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:02,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723098721] [2023-04-03 02:21:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:02,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:02,761 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 02:21:02,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:02,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723098721] [2023-04-03 02:21:02,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723098721] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:02,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:02,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:02,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62429300] [2023-04-03 02:21:02,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:02,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:02,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:02,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:02,765 INFO L87 Difference]: Start difference. First operand 123 states and 174 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 02:21:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:02,842 INFO L93 Difference]: Finished difference Result 274 states and 405 transitions. [2023-04-03 02:21:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2023-04-03 02:21:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:02,849 INFO L225 Difference]: With dead ends: 274 [2023-04-03 02:21:02,853 INFO L226 Difference]: Without dead ends: 178 [2023-04-03 02:21:02,856 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 02:21:02,858 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 79 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:02,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 180 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-03 02:21:02,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2023-04-03 02:21:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.4534883720930232) internal successors, (250), 172 states have internal predecessors, (250), 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 02:21:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 253 transitions. [2023-04-03 02:21:02,880 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 253 transitions. Word has length 37 [2023-04-03 02:21:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:02,881 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 253 transitions. [2023-04-03 02:21:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 02:21:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 253 transitions. [2023-04-03 02:21:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 02:21:02,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:02,882 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] [2023-04-03 02:21:02,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:21:02,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:02,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:02,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1398943356, now seen corresponding path program 1 times [2023-04-03 02:21:02,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:02,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196757203] [2023-04-03 02:21:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:02,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:03,018 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 02:21:03,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:03,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196757203] [2023-04-03 02:21:03,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196757203] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:03,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614755439] [2023-04-03 02:21:03,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:03,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:03,021 INFO L87 Difference]: Start difference. First operand 176 states and 253 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 02:21:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:03,074 INFO L93 Difference]: Finished difference Result 436 states and 646 transitions. [2023-04-03 02:21:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 39 [2023-04-03 02:21:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:03,076 INFO L225 Difference]: With dead ends: 436 [2023-04-03 02:21:03,076 INFO L226 Difference]: Without dead ends: 288 [2023-04-03 02:21:03,080 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 02:21:03,083 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 79 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 223 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 02:21:03,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 223 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-04-03 02:21:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 286. [2023-04-03 02:21:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 282 states have (on average 1.4680851063829787) internal successors, (414), 282 states have internal predecessors, (414), 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 02:21:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 417 transitions. [2023-04-03 02:21:03,138 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 417 transitions. Word has length 39 [2023-04-03 02:21:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:03,138 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 417 transitions. [2023-04-03 02:21:03,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 02:21:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 417 transitions. [2023-04-03 02:21:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-03 02:21:03,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:03,139 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] [2023-04-03 02:21:03,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:21:03,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:03,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash 826575106, now seen corresponding path program 1 times [2023-04-03 02:21:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585774913] [2023-04-03 02:21:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:03,233 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 02:21:03,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:03,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585774913] [2023-04-03 02:21:03,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585774913] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:03,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:03,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280272474] [2023-04-03 02:21:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:03,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:03,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:03,235 INFO L87 Difference]: Start difference. First operand 286 states and 417 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 02:21:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:03,279 INFO L93 Difference]: Finished difference Result 705 states and 1050 transitions. [2023-04-03 02:21:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 41 [2023-04-03 02:21:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:03,282 INFO L225 Difference]: With dead ends: 705 [2023-04-03 02:21:03,282 INFO L226 Difference]: Without dead ends: 447 [2023-04-03 02:21:03,283 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 02:21:03,293 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 78 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 197 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 02:21:03,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 197 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-04-03 02:21:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 445. [2023-04-03 02:21:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 441 states have (on average 1.4829931972789117) internal successors, (654), 441 states have internal predecessors, (654), 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 02:21:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 657 transitions. [2023-04-03 02:21:03,333 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 657 transitions. Word has length 41 [2023-04-03 02:21:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:03,333 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 657 transitions. [2023-04-03 02:21:03,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 02:21:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 657 transitions. [2023-04-03 02:21:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:21:03,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:03,334 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] [2023-04-03 02:21:03,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:21:03,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:03,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1136663979, now seen corresponding path program 1 times [2023-04-03 02:21:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:03,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210180859] [2023-04-03 02:21:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:03,433 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 02:21:03,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:03,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210180859] [2023-04-03 02:21:03,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210180859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:03,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:03,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:03,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417618730] [2023-04-03 02:21:03,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:03,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:03,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:03,438 INFO L87 Difference]: Start difference. First operand 445 states and 657 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 02:21:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:03,574 INFO L93 Difference]: Finished difference Result 1145 states and 1706 transitions. [2023-04-03 02:21:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:03,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 43 [2023-04-03 02:21:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:03,578 INFO L225 Difference]: With dead ends: 1145 [2023-04-03 02:21:03,578 INFO L226 Difference]: Without dead ends: 741 [2023-04-03 02:21:03,578 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 02:21:03,579 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 74 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 204 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 02:21:03,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 204 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2023-04-03 02:21:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 739. [2023-04-03 02:21:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 735 states have (on average 1.473469387755102) internal successors, (1083), 735 states have internal predecessors, (1083), 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 02:21:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1086 transitions. [2023-04-03 02:21:03,690 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1086 transitions. Word has length 43 [2023-04-03 02:21:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:03,690 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 1086 transitions. [2023-04-03 02:21:03,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 02:21:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1086 transitions. [2023-04-03 02:21:03,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-03 02:21:03,691 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:03,691 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] [2023-04-03 02:21:03,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:21:03,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:03,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash 863823016, now seen corresponding path program 1 times [2023-04-03 02:21:03,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:03,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840354457] [2023-04-03 02:21:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:03,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:03,827 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 02:21:03,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840354457] [2023-04-03 02:21:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840354457] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:03,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398118613] [2023-04-03 02:21:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:03,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:03,829 INFO L87 Difference]: Start difference. First operand 739 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 02:21:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:04,010 INFO L93 Difference]: Finished difference Result 1854 states and 2754 transitions. [2023-04-03 02:21:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:04,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 45 [2023-04-03 02:21:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:04,014 INFO L225 Difference]: With dead ends: 1854 [2023-04-03 02:21:04,014 INFO L226 Difference]: Without dead ends: 1156 [2023-04-03 02:21:04,016 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 02:21:04,016 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 73 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 199 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 02:21:04,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 199 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2023-04-03 02:21:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1154. [2023-04-03 02:21:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1150 states have (on average 1.48) internal successors, (1702), 1150 states have internal predecessors, (1702), 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 02:21:04,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1705 transitions. [2023-04-03 02:21:04,116 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1705 transitions. Word has length 45 [2023-04-03 02:21:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:04,117 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1705 transitions. [2023-04-03 02:21:04,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 02:21:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1705 transitions. [2023-04-03 02:21:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-03 02:21:04,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:04,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:04,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:21:04,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:04,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:04,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1835575819, now seen corresponding path program 1 times [2023-04-03 02:21:04,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:04,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885399862] [2023-04-03 02:21:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:04,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:04,212 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 02:21:04,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:04,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885399862] [2023-04-03 02:21:04,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885399862] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276006454] [2023-04-03 02:21:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:04,214 INFO L87 Difference]: Start difference. First operand 1154 states and 1705 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 02:21:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:04,611 INFO L93 Difference]: Finished difference Result 2929 states and 4358 transitions. [2023-04-03 02:21:04,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:21:04,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 47 [2023-04-03 02:21:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:04,635 INFO L225 Difference]: With dead ends: 2929 [2023-04-03 02:21:04,635 INFO L226 Difference]: Without dead ends: 1811 [2023-04-03 02:21:04,637 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 02:21:04,638 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 435 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 783 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 02:21:04,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 783 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2023-04-03 02:21:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1785. [2023-04-03 02:21:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1781 states have (on average 1.4884896125772038) internal successors, (2651), 1781 states have internal predecessors, (2651), 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 02:21:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 2654 transitions. [2023-04-03 02:21:04,909 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 2654 transitions. Word has length 47 [2023-04-03 02:21:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:04,909 INFO L495 AbstractCegarLoop]: Abstraction has 1785 states and 2654 transitions. [2023-04-03 02:21:04,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 02:21:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 2654 transitions. [2023-04-03 02:21:04,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 02:21:04,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:04,910 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 02:21:04,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:21:04,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:04,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:04,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1129886009, now seen corresponding path program 1 times [2023-04-03 02:21:04,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:04,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532207167] [2023-04-03 02:21:04,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:04,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:05,114 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 02:21:05,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:05,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532207167] [2023-04-03 02:21:05,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532207167] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:05,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:05,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:21:05,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066739599] [2023-04-03 02:21:05,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:05,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:21:05,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:21:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:21:05,116 INFO L87 Difference]: Start difference. First operand 1785 states and 2654 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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 02:21:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:05,495 INFO L93 Difference]: Finished difference Result 3518 states and 5243 transitions. [2023-04-03 02:21:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:21:05,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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 02:21:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:05,502 INFO L225 Difference]: With dead ends: 3518 [2023-04-03 02:21:05,503 INFO L226 Difference]: Without dead ends: 1787 [2023-04-03 02:21:05,506 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 02:21:05,516 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 144 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:05,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 281 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2023-04-03 02:21:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1782. [2023-04-03 02:21:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1778 states have (on average 1.482564679415073) internal successors, (2636), 1778 states have internal predecessors, (2636), 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 02:21:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2639 transitions. [2023-04-03 02:21:05,785 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2639 transitions. Word has length 48 [2023-04-03 02:21:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:05,800 INFO L495 AbstractCegarLoop]: Abstraction has 1782 states and 2639 transitions. [2023-04-03 02:21:05,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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 02:21:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2639 transitions. [2023-04-03 02:21:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:21:05,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:05,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:05,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:21:05,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:05,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:05,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1787036325, now seen corresponding path program 1 times [2023-04-03 02:21:05,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:05,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112782682] [2023-04-03 02:21:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:05,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:06,134 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 02:21:06,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:06,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112782682] [2023-04-03 02:21:06,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112782682] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:06,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:06,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742321442] [2023-04-03 02:21:06,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:06,137 INFO L87 Difference]: Start difference. First operand 1782 states and 2639 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:06,382 INFO L93 Difference]: Finished difference Result 2950 states and 4314 transitions. [2023-04-03 02:21:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:21:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-03 02:21:06,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:06,391 INFO L225 Difference]: With dead ends: 2950 [2023-04-03 02:21:06,391 INFO L226 Difference]: Without dead ends: 2948 [2023-04-03 02:21:06,394 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 02:21:06,395 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 146 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:06,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 560 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:06,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2023-04-03 02:21:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 1826. [2023-04-03 02:21:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1822 states have (on average 1.4582875960482986) internal successors, (2657), 1822 states have internal predecessors, (2657), 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 02:21:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2660 transitions. [2023-04-03 02:21:06,603 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2660 transitions. Word has length 56 [2023-04-03 02:21:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:06,603 INFO L495 AbstractCegarLoop]: Abstraction has 1826 states and 2660 transitions. [2023-04-03 02:21:06,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:21:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2660 transitions. [2023-04-03 02:21:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:21:06,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:06,604 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:21:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:21:06,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:06,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1605960414, now seen corresponding path program 1 times [2023-04-03 02:21:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:06,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54685935] [2023-04-03 02:21:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:07,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:07,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54685935] [2023-04-03 02:21:07,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54685935] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:07,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798701621] [2023-04-03 02:21:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:07,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:07,600 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 02:21:07,615 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 02:21:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:07,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-03 02:21:07,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-03 02:21:08,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:21:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798701621] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:21:12,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849774907] [2023-04-03 02:21:12,954 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-04-03 02:21:12,955 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:21:12,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:21:12,960 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:21:12,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:21:13,890 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 190 for LOIs [2023-04-03 02:21:21,375 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12