/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:30:29,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:30:29,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:30:29,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:30:29,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:30:29,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:30:29,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:30:29,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:30:29,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:30:29,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:30:29,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:30:29,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:30:29,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:30:29,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:30:29,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:30:29,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:30:29,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:30:29,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:30:29,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:30:29,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:30:29,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:30:29,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:30:29,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:30:29,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:30:29,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:30:29,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:30:29,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:30:29,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:30:29,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:30:29,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:30:29,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:30:29,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:30:29,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:30:29,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:30:29,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:30:29,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:30:29,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:30:29,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:30:29,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:30:29,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:30:29,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:30:29,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 06:30:29,359 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:30:29,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:30:29,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:30:29,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:30:29,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:30:29,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:30:29,361 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:30:29,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:30:29,361 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:30:29,361 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:30:29,362 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:30:29,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:30:29,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:30:29,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:30:29,362 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:30:29,363 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:30:29,363 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:30:29,363 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:30:29,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:30:29,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:30:29,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:30:29,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:30:29,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:30:29,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:30:29,366 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:30:29,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:30:29,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:30:29,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:30:29,549 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:30:29,549 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:30:29,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 06:30:30,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:30:30,817 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:30:30,818 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 06:30:30,823 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f852a3386/8a82872da0e24d888647ee9f83c264c6/FLAG7eb3a7593 [2023-04-01 06:30:30,834 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f852a3386/8a82872da0e24d888647ee9f83c264c6 [2023-04-01 06:30:30,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:30:30,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:30:30,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:30:30,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:30:30,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:30:30,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:30:30" (1/1) ... [2023-04-01 06:30:30,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408a4c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:30, skipping insertion in model container [2023-04-01 06:30:30,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:30:30" (1/1) ... [2023-04-01 06:30:30,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:30:30,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:30:31,000 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2023-04-01 06:30:31,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:30:31,029 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:30:31,052 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2023-04-01 06:30:31,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:30:31,075 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:30:31,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31 WrapperNode [2023-04-01 06:30:31,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:30:31,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:30:31,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:30:31,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:30:31,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:30:31,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:30:31,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:30:31,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:30:31,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (1/1) ... [2023-04-01 06:30:31,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:30:31,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:30:31,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 06:30:31,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 06:30:31,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:30:31,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:30:31,175 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:30:31,175 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:30:31,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:30:31,175 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:30:31,176 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:30:31,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:30:31,296 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:30:31,298 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:30:31,602 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:30:31,693 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:30:31,693 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:30:31,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:30:31 BoogieIcfgContainer [2023-04-01 06:30:31,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:30:31,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:30:31,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:30:31,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:30:31,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:30:30" (1/3) ... [2023-04-01 06:30:31,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785cce70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:30:31, skipping insertion in model container [2023-04-01 06:30:31,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:30:31" (2/3) ... [2023-04-01 06:30:31,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785cce70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:30:31, skipping insertion in model container [2023-04-01 06:30:31,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:30:31" (3/3) ... [2023-04-01 06:30:31,701 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-01 06:30:31,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:30:31,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:30:31,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:30:31,760 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;@112ff3b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:30:31,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:30:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 64 states have (on average 1.65625) internal successors, (106), 65 states have internal predecessors, (106), 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) [2023-04-01 06:30:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 06:30:31,772 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:31,773 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] [2023-04-01 06:30:31,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:31,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 148092094, now seen corresponding path program 1 times [2023-04-01 06:30:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:31,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225006477] [2023-04-01 06:30:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:31,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:32,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225006477] [2023-04-01 06:30:32,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225006477] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:32,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:32,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119334129] [2023-04-01 06:30:32,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:32,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:32,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:32,135 INFO L87 Difference]: Start difference. First operand has 70 states, 64 states have (on average 1.65625) internal successors, (106), 65 states have internal predecessors, (106), 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 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2023-04-01 06:30:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:32,231 INFO L93 Difference]: Finished difference Result 153 states and 231 transitions. [2023-04-01 06:30:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2023-04-01 06:30:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:32,239 INFO L225 Difference]: With dead ends: 153 [2023-04-01 06:30:32,240 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 06:30:32,242 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 [2023-04-01 06:30:32,247 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 79 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:32,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 204 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:30:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 06:30:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-04-01 06:30:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 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) [2023-04-01 06:30:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2023-04-01 06:30:32,302 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 32 [2023-04-01 06:30:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:32,303 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2023-04-01 06:30:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2023-04-01 06:30:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2023-04-01 06:30:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 06:30:32,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:32,306 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] [2023-04-01 06:30:32,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:30:32,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:32,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2117687285, now seen corresponding path program 1 times [2023-04-01 06:30:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:32,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657207278] [2023-04-01 06:30:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:32,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:32,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657207278] [2023-04-01 06:30:32,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657207278] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:32,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:32,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:32,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267038718] [2023-04-01 06:30:32,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:32,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:32,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:32,414 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. 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) [2023-04-01 06:30:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:32,489 INFO L93 Difference]: Finished difference Result 220 states and 316 transitions. [2023-04-01 06:30:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:32,491 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 [2023-04-01 06:30:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:32,495 INFO L225 Difference]: With dead ends: 220 [2023-04-01 06:30:32,495 INFO L226 Difference]: Without dead ends: 147 [2023-04-01 06:30:32,496 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 [2023-04-01 06:30:32,497 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:32,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 155 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:30:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-04-01 06:30:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2023-04-01 06:30:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.425531914893617) internal successors, (201), 141 states have internal predecessors, (201), 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) [2023-04-01 06:30:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 204 transitions. [2023-04-01 06:30:32,521 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 204 transitions. Word has length 35 [2023-04-01 06:30:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:32,522 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 204 transitions. [2023-04-01 06:30:32,522 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) [2023-04-01 06:30:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 204 transitions. [2023-04-01 06:30:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 06:30:32,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:32,523 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] [2023-04-01 06:30:32,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:30:32,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:32,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash 692722299, now seen corresponding path program 1 times [2023-04-01 06:30:32,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:32,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175771066] [2023-04-01 06:30:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:32,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:32,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:32,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175771066] [2023-04-01 06:30:32,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175771066] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:32,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:32,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 06:30:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798731014] [2023-04-01 06:30:32,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:32,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 06:30:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 06:30:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 06:30:32,640 INFO L87 Difference]: Start difference. First operand 145 states and 204 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2023-04-01 06:30:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:32,734 INFO L93 Difference]: Finished difference Result 345 states and 498 transitions. [2023-04-01 06:30:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 06:30:32,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2023-04-01 06:30:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:32,740 INFO L225 Difference]: With dead ends: 345 [2023-04-01 06:30:32,740 INFO L226 Difference]: Without dead ends: 223 [2023-04-01 06:30:32,743 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 [2023-04-01 06:30:32,746 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:32,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 140 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:30:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-01 06:30:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2023-04-01 06:30:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.423963133640553) internal successors, (309), 217 states have internal predecessors, (309), 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) [2023-04-01 06:30:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 312 transitions. [2023-04-01 06:30:32,787 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 312 transitions. Word has length 38 [2023-04-01 06:30:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:32,787 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 312 transitions. [2023-04-01 06:30:32,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2023-04-01 06:30:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 312 transitions. [2023-04-01 06:30:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 06:30:32,793 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:32,793 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] [2023-04-01 06:30:32,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:30:32,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:32,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1636378340, now seen corresponding path program 1 times [2023-04-01 06:30:32,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:32,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52302192] [2023-04-01 06:30:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:32,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:32,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:32,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52302192] [2023-04-01 06:30:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52302192] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:32,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:30:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15553136] [2023-04-01 06:30:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:32,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:30:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:30:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:30:32,918 INFO L87 Difference]: Start difference. First operand 221 states and 312 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-04-01 06:30:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:33,037 INFO L93 Difference]: Finished difference Result 707 states and 1011 transitions. [2023-04-01 06:30:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:30:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 [2023-04-01 06:30:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:33,040 INFO L225 Difference]: With dead ends: 707 [2023-04-01 06:30:33,040 INFO L226 Difference]: Without dead ends: 509 [2023-04-01 06:30:33,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:30:33,051 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 162 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:33,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 274 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:30:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-04-01 06:30:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 505. [2023-04-01 06:30:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.4231536926147705) internal successors, (713), 501 states have internal predecessors, (713), 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) [2023-04-01 06:30:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 716 transitions. [2023-04-01 06:30:33,151 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 716 transitions. Word has length 41 [2023-04-01 06:30:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:33,153 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 716 transitions. [2023-04-01 06:30:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2023-04-01 06:30:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 716 transitions. [2023-04-01 06:30:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 06:30:33,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:33,154 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] [2023-04-01 06:30:33,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 06:30:33,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:33,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1159174075, now seen corresponding path program 1 times [2023-04-01 06:30:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002934195] [2023-04-01 06:30:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:33,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002934195] [2023-04-01 06:30:33,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002934195] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:33,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:33,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:30:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184766292] [2023-04-01 06:30:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:33,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:30:33,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:33,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:30:33,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:30:33,263 INFO L87 Difference]: Start difference. First operand 505 states and 716 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2023-04-01 06:30:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:33,543 INFO L93 Difference]: Finished difference Result 1287 states and 1850 transitions. [2023-04-01 06:30:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:30:33,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-01 06:30:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:33,554 INFO L225 Difference]: With dead ends: 1287 [2023-04-01 06:30:33,554 INFO L226 Difference]: Without dead ends: 805 [2023-04-01 06:30:33,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:30:33,556 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 336 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 89 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:30:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-04-01 06:30:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 803. [2023-04-01 06:30:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 799 states have (on average 1.4180225281602004) internal successors, (1133), 799 states have internal predecessors, (1133), 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) [2023-04-01 06:30:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1136 transitions. [2023-04-01 06:30:33,682 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1136 transitions. Word has length 43 [2023-04-01 06:30:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:33,683 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1136 transitions. [2023-04-01 06:30:33,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2023-04-01 06:30:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1136 transitions. [2023-04-01 06:30:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 06:30:33,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:33,684 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] [2023-04-01 06:30:33,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 06:30:33,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:33,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:33,685 INFO L85 PathProgramCache]: Analyzing trace with hash 535323318, now seen corresponding path program 1 times [2023-04-01 06:30:33,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:33,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719077468] [2023-04-01 06:30:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:33,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:34,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:34,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719077468] [2023-04-01 06:30:34,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719077468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:30:34,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:30:34,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-01 06:30:34,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540982488] [2023-04-01 06:30:34,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:30:34,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 06:30:34,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:30:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 06:30:34,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-01 06:30:34,013 INFO L87 Difference]: Start difference. First operand 803 states and 1136 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2023-04-01 06:30:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:30:34,332 INFO L93 Difference]: Finished difference Result 1482 states and 2099 transitions. [2023-04-01 06:30:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 06:30:34,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 [2023-04-01 06:30:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:30:34,338 INFO L225 Difference]: With dead ends: 1482 [2023-04-01 06:30:34,338 INFO L226 Difference]: Without dead ends: 1480 [2023-04-01 06:30:34,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-01 06:30:34,340 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 501 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 06:30:34,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 670 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 06:30:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-04-01 06:30:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 940. [2023-04-01 06:30:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 936 states have (on average 1.4166666666666667) internal successors, (1326), 936 states have internal predecessors, (1326), 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) [2023-04-01 06:30:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1329 transitions. [2023-04-01 06:30:34,511 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1329 transitions. Word has length 43 [2023-04-01 06:30:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:30:34,513 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1329 transitions. [2023-04-01 06:30:34,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2023-04-01 06:30:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1329 transitions. [2023-04-01 06:30:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 06:30:34,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:30:34,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:30:34,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 06:30:34,515 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:30:34,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:30:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash -706550833, now seen corresponding path program 1 times [2023-04-01 06:30:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:30:34,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134532739] [2023-04-01 06:30:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:30:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:35,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:30:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134532739] [2023-04-01 06:30:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134532739] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:30:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876564842] [2023-04-01 06:30:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:30:35,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:30:35,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:30:35,332 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) [2023-04-01 06:30:35,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 06:30:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:30:35,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 06:30:35,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:30:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:36,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:30:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 06:30:39,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876564842] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:30:39,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37293639] [2023-04-01 06:30:39,264 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-04-01 06:30:39,264 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:30:39,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:30:39,271 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:30:39,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:30:39,739 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 120 for LOIs [2023-04-01 06:31:00,951 WARN L223 SmtUtils]: Spent 19.72s on a formula simplification. DAG size of input: 6195 DAG size of output: 269 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-01 06:31:06,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 103 for LOIs [2023-04-01 06:31:06,263 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 06:31:14,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11391#(and (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (= ~nomsg~0 ~p2_old~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= main_~main__c1~0 0) (= ~__return_6448~0 main_~check__tmp~0) (= main_~__tmp_1~0 0) (= ~nomsg~0 ~p2_new~0) (<= ~mode1~0 1) (or (< 1 (+ ~st3~0 ~st2~0 ~st1~0)) (and (<= 3 ~r1~0) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (= main_~main__c1~0 ~__return_6448~0) (= ~p3_old~0 ~nomsg~0) (<= 0 ~mode2~0) (= main_~__tmp_1~0 main_~assert__arg~0))' at error location [2023-04-01 06:31:14,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 06:31:14,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 06:31:14,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2023-04-01 06:31:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604353418] [2023-04-01 06:31:14,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 06:31:14,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 06:31:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:31:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 06:31:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=5645, Unknown=0, NotChecked=0, Total=6480 [2023-04-01 06:31:14,547 INFO L87 Difference]: Start difference. First operand 940 states and 1329 transitions. Second operand has 40 states, 40 states have (on average 3.45) internal successors, (138), 40 states have internal predecessors, (138), 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)