/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:20:50,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:20:50,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:20:50,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:20:50,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:20:50,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:20:50,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:20:50,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:20:50,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:20:50,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:20:50,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:20:50,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:20:50,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:20:50,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:20:50,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:20:50,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:20:50,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:20:50,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:20:50,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:20:50,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:20:50,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:20:50,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:20:50,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:20:50,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:20:50,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:20:50,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:20:50,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:20:50,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:20:50,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:20:50,424 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:20:50,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:20:50,425 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:20:50,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:20:50,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:20:50,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:20:50,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:20:50,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:20:50,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:20:50,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:20:50,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:20:50,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:20:50,435 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 12:20:50,477 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:20:50,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:20:50,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:20:50,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:20:50,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:20:50,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:20:50,479 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:20:50,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:20:50,479 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:20:50,479 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:20:50,480 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:20:50,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:20:50,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:20:50,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:20:50,480 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:20:50,480 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:20:50,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:20:50,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:20:50,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:20:50,482 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:20:50,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:20:50,482 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:20:50,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:20:50,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:20:50,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:50,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:20:50,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:20:50,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:20:50,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:20:50,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:20:50,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:20:50,813 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:20:50,813 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:20:50,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2023-04-01 12:20:51,857 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:20:51,994 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:20:51,994 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c [2023-04-01 12:20:52,007 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b33a9d99/2a79fff6b71b40a39d330e60fd450f22/FLAGa2ec20f43 [2023-04-01 12:20:52,017 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b33a9d99/2a79fff6b71b40a39d330e60fd450f22 [2023-04-01 12:20:52,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:20:52,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:20:52,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:52,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:20:52,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:20:52,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f94a8d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52, skipping insertion in model container [2023-04-01 12:20:52,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:20:52,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:20:52,255 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2023-04-01 12:20:52,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:52,267 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:20:52,304 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.BOUNDED-6.pals.c[12762,12775] [2023-04-01 12:20:52,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:52,314 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:20:52,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52 WrapperNode [2023-04-01 12:20:52,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:52,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:20:52,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:20:52,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:20:52,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:20:52,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:20:52,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:20:52,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:20:52,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (1/1) ... [2023-04-01 12:20:52,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:52,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:52,402 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 12:20:52,416 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 12:20:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:20:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:20:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:20:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:20:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:20:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:20:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:20:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:20:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:20:52,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:20:52,431 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:20:52,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:20:52,510 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:20:52,511 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:20:52,887 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:20:53,201 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:20:53,201 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:20:53,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:53 BoogieIcfgContainer [2023-04-01 12:20:53,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:20:53,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:20:53,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:20:53,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:20:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:20:52" (1/3) ... [2023-04-01 12:20:53,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d510d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:53, skipping insertion in model container [2023-04-01 12:20:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:52" (2/3) ... [2023-04-01 12:20:53,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d510d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:53, skipping insertion in model container [2023-04-01 12:20:53,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:53" (3/3) ... [2023-04-01 12:20:53,211 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.BOUNDED-6.pals.c [2023-04-01 12:20:53,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:20:53,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:20:53,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:20:53,266 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;@47b2c3d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:20:53,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:20:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 12:20:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 12:20:53,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:53,277 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] [2023-04-01 12:20:53,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:53,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash 466152659, now seen corresponding path program 1 times [2023-04-01 12:20:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:53,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152122350] [2023-04-01 12:20:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:55,599 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 12:20:55,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152122350] [2023-04-01 12:20:55,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152122350] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:55,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:55,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 12:20:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239244058] [2023-04-01 12:20:55,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:55,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 12:20:55,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 12:20:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:20:55,633 INFO L87 Difference]: Start difference. First operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:56,299 INFO L93 Difference]: Finished difference Result 146 states and 187 transitions. [2023-04-01 12:20:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 12:20:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-04-01 12:20:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:56,309 INFO L225 Difference]: With dead ends: 146 [2023-04-01 12:20:56,309 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 12:20:56,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:20:56,315 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 467 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:56,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 104 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:20:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 12:20:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2023-04-01 12:20:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.434782608695652) internal successors, (66), 47 states have internal predecessors, (66), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 12:20:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2023-04-01 12:20:56,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 30 [2023-04-01 12:20:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:56,360 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2023-04-01 12:20:56,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:20:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2023-04-01 12:20:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 12:20:56,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:56,362 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] [2023-04-01 12:20:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:20:56,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:56,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1710709580, now seen corresponding path program 1 times [2023-04-01 12:20:56,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:56,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410195722] [2023-04-01 12:20:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:56,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:57,242 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 12:20:57,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:57,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410195722] [2023-04-01 12:20:57,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410195722] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:57,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:57,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:20:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070599312] [2023-04-01 12:20:57,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:57,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:20:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:20:57,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:20:57,246 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:57,543 INFO L93 Difference]: Finished difference Result 145 states and 185 transitions. [2023-04-01 12:20:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:20:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2023-04-01 12:20:57,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:57,549 INFO L225 Difference]: With dead ends: 145 [2023-04-01 12:20:57,550 INFO L226 Difference]: Without dead ends: 103 [2023-04-01 12:20:57,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:20:57,554 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:57,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 66 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:20:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-01 12:20:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 70. [2023-04-01 12:20:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 47 states have internal predecessors, (65), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-04-01 12:20:57,569 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 31 [2023-04-01 12:20:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:57,569 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-04-01 12:20:57,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-04-01 12:20:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 12:20:57,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:57,570 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 12:20:57,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:20:57,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:57,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1550987428, now seen corresponding path program 1 times [2023-04-01 12:20:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:57,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072353887] [2023-04-01 12:20:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:57,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:20:58,463 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 12:20:58,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:20:58,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072353887] [2023-04-01 12:20:58,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072353887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:20:58,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:20:58,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:20:58,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227556626] [2023-04-01 12:20:58,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:20:58,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:20:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:20:58,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:20:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:20:58,465 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:20:58,751 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2023-04-01 12:20:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:20:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-04-01 12:20:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:20:58,752 INFO L225 Difference]: With dead ends: 139 [2023-04-01 12:20:58,752 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 12:20:58,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:20:58,753 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:20:58,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 67 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:20:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 12:20:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2023-04-01 12:20:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:20:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-04-01 12:20:58,764 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 32 [2023-04-01 12:20:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:20:58,764 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-04-01 12:20:58,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:20:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-04-01 12:20:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 12:20:58,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:58,765 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] [2023-04-01 12:20:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:20:58,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:58,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1522331829, now seen corresponding path program 1 times [2023-04-01 12:20:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:58,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141586963] [2023-04-01 12:20:58,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:58,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:00,144 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 12:21:00,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141586963] [2023-04-01 12:21:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141586963] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:00,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:00,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:21:00,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89954742] [2023-04-01 12:21:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:00,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:21:00,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:21:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:21:00,146 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 16 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:21:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:00,826 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2023-04-01 12:21:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 12:21:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2023-04-01 12:21:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:00,828 INFO L225 Difference]: With dead ends: 147 [2023-04-01 12:21:00,828 INFO L226 Difference]: Without dead ends: 110 [2023-04-01 12:21:00,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 12:21:00,834 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 378 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:00,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 119 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:21:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-01 12:21:00,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2023-04-01 12:21:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 47 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:21:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-04-01 12:21:00,850 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 33 [2023-04-01 12:21:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:00,851 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-04-01 12:21:00,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:21:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-04-01 12:21:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 12:21:00,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:00,852 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 12:21:00,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:21:00,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:00,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash 308547261, now seen corresponding path program 1 times [2023-04-01 12:21:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:00,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136916598] [2023-04-01 12:21:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:00,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:01,971 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 12:21:01,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:01,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136916598] [2023-04-01 12:21:01,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136916598] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:01,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:01,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:21:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58495592] [2023-04-01 12:21:01,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:01,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:21:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:21:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:21:01,976 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:21:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:02,835 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2023-04-01 12:21:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 12:21:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-04-01 12:21:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:02,836 INFO L225 Difference]: With dead ends: 213 [2023-04-01 12:21:02,836 INFO L226 Difference]: Without dead ends: 173 [2023-04-01 12:21:02,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 12:21:02,837 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 289 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:02,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 209 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:21:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-01 12:21:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 74. [2023-04-01 12:21:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:21:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2023-04-01 12:21:02,853 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 35 [2023-04-01 12:21:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:02,853 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2023-04-01 12:21:02,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:21:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2023-04-01 12:21:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 12:21:02,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:02,854 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] [2023-04-01 12:21:02,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:21:02,854 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:02,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1057315053, now seen corresponding path program 1 times [2023-04-01 12:21:02,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:02,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18498037] [2023-04-01 12:21:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:02,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:03,320 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 12:21:03,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:03,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18498037] [2023-04-01 12:21:03,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18498037] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:03,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:03,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:21:03,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749970938] [2023-04-01 12:21:03,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:03,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:21:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:21:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:21:03,322 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:21:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:03,531 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2023-04-01 12:21:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 12:21:03,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-04-01 12:21:03,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:03,532 INFO L225 Difference]: With dead ends: 145 [2023-04-01 12:21:03,533 INFO L226 Difference]: Without dead ends: 100 [2023-04-01 12:21:03,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:21:03,533 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:03,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 64 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:21:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-01 12:21:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2023-04-01 12:21:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:21:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2023-04-01 12:21:03,549 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 36 [2023-04-01 12:21:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:03,549 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2023-04-01 12:21:03,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:21:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2023-04-01 12:21:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 12:21:03,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:03,550 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 12:21:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:21:03,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:03,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1664650023, now seen corresponding path program 1 times [2023-04-01 12:21:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:03,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269611325] [2023-04-01 12:21:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:03,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:04,801 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 12:21:04,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269611325] [2023-04-01 12:21:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269611325] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:04,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:04,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:21:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200082198] [2023-04-01 12:21:04,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:21:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:21:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:21:04,802 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:21:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:05,520 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2023-04-01 12:21:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 12:21:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-04-01 12:21:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:05,522 INFO L225 Difference]: With dead ends: 156 [2023-04-01 12:21:05,522 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 12:21:05,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 12:21:05,523 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 316 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:05,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 113 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:21:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 12:21:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2023-04-01 12:21:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:21:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-01 12:21:05,538 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 38 [2023-04-01 12:21:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:05,538 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-01 12:21:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:21:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-01 12:21:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 12:21:05,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:05,540 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] [2023-04-01 12:21:05,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:21:05,540 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:05,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:05,541 INFO L85 PathProgramCache]: Analyzing trace with hash 59660117, now seen corresponding path program 1 times [2023-04-01 12:21:05,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:05,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521063397] [2023-04-01 12:21:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:05,745 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 12:21:05,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:05,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521063397] [2023-04-01 12:21:05,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521063397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:05,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:05,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:21:05,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472815440] [2023-04-01 12:21:05,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:05,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:21:05,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:05,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:21:05,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:21:05,748 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 12:21:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:05,900 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2023-04-01 12:21:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:21:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-04-01 12:21:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:05,902 INFO L225 Difference]: With dead ends: 106 [2023-04-01 12:21:05,902 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 12:21:05,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:21:05,902 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:05,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 408 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:21:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 12:21:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2023-04-01 12:21:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 12:21:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-04-01 12:21:05,920 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 39 [2023-04-01 12:21:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:05,920 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-04-01 12:21:05,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 12:21:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-04-01 12:21:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:21:05,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:05,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:21:05,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:21:05,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:05,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1821725225, now seen corresponding path program 1 times [2023-04-01 12:21:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465529484] [2023-04-01 12:21:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:05,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:21:08,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:08,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465529484] [2023-04-01 12:21:08,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465529484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:21:08,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276783633] [2023-04-01 12:21:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:08,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:21:08,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:21:08,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:21:08,354 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 12:21:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:08,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-01 12:21:08,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:21:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:16,669 INFO L327 TraceCheckSpWp]: Computing backward predicates...