/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-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:45:40,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:45:40,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:45:40,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 12:45:40,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:45:40,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:45:40,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:45:40,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:45:40,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:45:40,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:45:40,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:45:40,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:45:40,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:45:40,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:45:40,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:45:40,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:45:40,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:45:40,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:45:40,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:45:40,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:45:40,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:45:40,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2023-04-01 12:45:40,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:45:40,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:45:40,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:45:40,422 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 12:45:40,453 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:45:40,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:45:40,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:45:40,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:45:40,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:45:40,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:45:40,456 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:45:40,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:45:40,456 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:45:40,456 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:45:40,457 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:45:40,457 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:45:40,457 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:45:40,457 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:45:40,457 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:45:40,457 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:45:40,457 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:45:40,458 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:45:40,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:45:40,458 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:45:40,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:45:40,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:45:40,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:45:40,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:45:40,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:45:40,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:45:40,459 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:45:40,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:45:40,459 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:45:40,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:45:40,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:45:40,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:45:40,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:45:40,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:45:40,460 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:45:40,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:45:40,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:45:40,461 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:45:40,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:45:40,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:45:40,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:45:40,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:45:40,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:45:40,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:45:40,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:45:40,711 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:45:40,712 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:45:40,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-01 12:45:41,904 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:45:42,138 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:45:42,139 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-01 12:45:42,150 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b455eadca/de9d9eb81b204b0d97d48eba93924233/FLAG3d0768385 [2023-04-01 12:45:42,164 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b455eadca/de9d9eb81b204b0d97d48eba93924233 [2023-04-01 12:45:42,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:45:42,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:45:42,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:45:42,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:45:42,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:45:42,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343a524a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42, skipping insertion in model container [2023-04-01 12:45:42,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:45:42,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:45:42,492 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.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[14220,14233] [2023-04-01 12:45:42,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:45:42,571 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:45:42,666 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.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[14220,14233] [2023-04-01 12:45:42,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:45:42,722 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:45:42,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42 WrapperNode [2023-04-01 12:45:42,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:45:42,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:45:42,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:45:42,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:45:42,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,815 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:45:42,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:45:42,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:45:42,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:45:42,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (1/1) ... [2023-04-01 12:45:42,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:45:42,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:45:42,857 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 12:45:42,889 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 12:45:42,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:45:42,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:45:42,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:45:42,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:45:42,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:45:42,905 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:45:42,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:45:42,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:45:42,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:45:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:45:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:45:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:45:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:45:42,908 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:45:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:45:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:45:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:45:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:45:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:45:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:45:42,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:45:43,069 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:45:43,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:45:43,922 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:45:44,240 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:45:44,240 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:45:44,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:45:44 BoogieIcfgContainer [2023-04-01 12:45:44,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:45:44,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:45:44,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:45:44,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:45:44,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:45:42" (1/3) ... [2023-04-01 12:45:44,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acd7ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:45:44, skipping insertion in model container [2023-04-01 12:45:44,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:45:42" (2/3) ... [2023-04-01 12:45:44,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acd7ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:45:44, skipping insertion in model container [2023-04-01 12:45:44,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:45:44" (3/3) ... [2023-04-01 12:45:44,252 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2023-04-01 12:45:44,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:45:44,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:45:44,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:45:44,328 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;@7838c848, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:45:44,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:45:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 259 states have internal predecessors, (362), 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 12:45:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 12:45:44,354 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:44,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:45:44,355 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:44,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1112906269, now seen corresponding path program 1 times [2023-04-01 12:45:44,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:44,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623792700] [2023-04-01 12:45:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:44,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:45,001 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 12:45:45,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:45,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623792700] [2023-04-01 12:45:45,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623792700] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:45,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:45,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:45:45,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731424645] [2023-04-01 12:45:45,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:45,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:45:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:45:45,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:45:45,045 INFO L87 Difference]: Start difference. First operand has 264 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 259 states have internal predecessors, (362), 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 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 12:45:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:45,291 INFO L93 Difference]: Finished difference Result 467 states and 669 transitions. [2023-04-01 12:45:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2023-04-01 12:45:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:45,306 INFO L225 Difference]: With dead ends: 467 [2023-04-01 12:45:45,306 INFO L226 Difference]: Without dead ends: 226 [2023-04-01 12:45:45,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:45,316 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 62 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:45,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 892 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-04-01 12:45:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-04-01 12:45:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.40990990990991) internal successors, (313), 222 states have internal predecessors, (313), 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 12:45:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 316 transitions. [2023-04-01 12:45:45,382 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 316 transitions. Word has length 80 [2023-04-01 12:45:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:45,383 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 316 transitions. [2023-04-01 12:45:45,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 12:45:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 316 transitions. [2023-04-01 12:45:45,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 12:45:45,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:45,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:45,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:45:45,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:45,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash 90676350, now seen corresponding path program 1 times [2023-04-01 12:45:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:45,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676151828] [2023-04-01 12:45:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:45,689 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 12:45:45,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:45,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676151828] [2023-04-01 12:45:45,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676151828] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:45,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:45,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:45,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585848766] [2023-04-01 12:45:45,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:45,693 INFO L87 Difference]: Start difference. First operand 226 states and 316 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 12:45:45,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:45,828 INFO L93 Difference]: Finished difference Result 541 states and 781 transitions. [2023-04-01 12:45:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:45,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 110 [2023-04-01 12:45:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:45,840 INFO L225 Difference]: With dead ends: 541 [2023-04-01 12:45:45,840 INFO L226 Difference]: Without dead ends: 359 [2023-04-01 12:45:45,846 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 12:45:45,848 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 220 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:45,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 552 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-04-01 12:45:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2023-04-01 12:45:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.4277620396600565) internal successors, (504), 353 states have internal predecessors, (504), 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 12:45:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 507 transitions. [2023-04-01 12:45:45,879 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 507 transitions. Word has length 110 [2023-04-01 12:45:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:45,880 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 507 transitions. [2023-04-01 12:45:45,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 12:45:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 507 transitions. [2023-04-01 12:45:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-01 12:45:45,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:45,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:45,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:45:45,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:45,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash -643318413, now seen corresponding path program 1 times [2023-04-01 12:45:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:45,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401067077] [2023-04-01 12:45:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:45,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:46,024 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 12:45:46,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:46,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401067077] [2023-04-01 12:45:46,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401067077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:46,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:46,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:46,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279825536] [2023-04-01 12:45:46,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:46,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:46,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:46,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:46,028 INFO L87 Difference]: Start difference. First operand 357 states and 507 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 12:45:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:46,156 INFO L93 Difference]: Finished difference Result 904 states and 1311 transitions. [2023-04-01 12:45:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 119 [2023-04-01 12:45:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:46,160 INFO L225 Difference]: With dead ends: 904 [2023-04-01 12:45:46,161 INFO L226 Difference]: Without dead ends: 597 [2023-04-01 12:45:46,164 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 12:45:46,167 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 215 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:46,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 504 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-04-01 12:45:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 595. [2023-04-01 12:45:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 591 states have (on average 1.4348561759729273) internal successors, (848), 591 states have internal predecessors, (848), 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 12:45:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 851 transitions. [2023-04-01 12:45:46,235 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 851 transitions. Word has length 119 [2023-04-01 12:45:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:46,236 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 851 transitions. [2023-04-01 12:45:46,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 12:45:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 851 transitions. [2023-04-01 12:45:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 12:45:46,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:46,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:45:46,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:46,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:46,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1278768630, now seen corresponding path program 1 times [2023-04-01 12:45:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:46,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359250041] [2023-04-01 12:45:46,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:46,385 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 12:45:46,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:46,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359250041] [2023-04-01 12:45:46,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359250041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:46,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:46,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128487922] [2023-04-01 12:45:46,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:46,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:46,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:46,387 INFO L87 Difference]: Start difference. First operand 595 states and 851 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 12:45:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:46,557 INFO L93 Difference]: Finished difference Result 1564 states and 2264 transitions. [2023-04-01 12:45:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:46,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 128 [2023-04-01 12:45:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:46,563 INFO L225 Difference]: With dead ends: 1564 [2023-04-01 12:45:46,563 INFO L226 Difference]: Without dead ends: 1025 [2023-04-01 12:45:46,565 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 12:45:46,566 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 209 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:46,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 500 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2023-04-01 12:45:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1023. [2023-04-01 12:45:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1019 states have (on average 1.4317958783120706) internal successors, (1459), 1019 states have internal predecessors, (1459), 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 12:45:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1462 transitions. [2023-04-01 12:45:46,661 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1462 transitions. Word has length 128 [2023-04-01 12:45:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:46,661 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1462 transitions. [2023-04-01 12:45:46,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 12:45:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1462 transitions. [2023-04-01 12:45:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-04-01 12:45:46,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:46,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:46,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:45:46,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:46,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash 476278237, now seen corresponding path program 1 times [2023-04-01 12:45:46,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:46,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229596436] [2023-04-01 12:45:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:46,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:46,763 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 12:45:46,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229596436] [2023-04-01 12:45:46,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229596436] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:46,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:46,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514797286] [2023-04-01 12:45:46,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:46,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:46,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:46,765 INFO L87 Difference]: Start difference. First operand 1023 states and 1462 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 12:45:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:47,125 INFO L93 Difference]: Finished difference Result 2746 states and 3946 transitions. [2023-04-01 12:45:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 137 [2023-04-01 12:45:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:47,134 INFO L225 Difference]: With dead ends: 2746 [2023-04-01 12:45:47,134 INFO L226 Difference]: Without dead ends: 1785 [2023-04-01 12:45:47,136 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 12:45:47,137 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 202 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:47,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 540 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2023-04-01 12:45:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1783. [2023-04-01 12:45:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1779 states have (on average 1.4198988195615514) internal successors, (2526), 1779 states have internal predecessors, (2526), 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 12:45:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2529 transitions. [2023-04-01 12:45:47,325 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2529 transitions. Word has length 137 [2023-04-01 12:45:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:47,326 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2529 transitions. [2023-04-01 12:45:47,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 12:45:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2529 transitions. [2023-04-01 12:45:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-01 12:45:47,331 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:47,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:45:47,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:47,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2016140062, now seen corresponding path program 1 times [2023-04-01 12:45:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:47,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755475209] [2023-04-01 12:45:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:47,453 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 12:45:47,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755475209] [2023-04-01 12:45:47,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755475209] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:47,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:47,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:47,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503201179] [2023-04-01 12:45:47,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:47,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:47,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:47,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:47,455 INFO L87 Difference]: Start difference. First operand 1783 states and 2529 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 12:45:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:47,858 INFO L93 Difference]: Finished difference Result 4828 states and 6852 transitions. [2023-04-01 12:45:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 146 [2023-04-01 12:45:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:47,872 INFO L225 Difference]: With dead ends: 4828 [2023-04-01 12:45:47,872 INFO L226 Difference]: Without dead ends: 3113 [2023-04-01 12:45:47,876 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 12:45:47,878 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 197 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:47,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 492 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2023-04-01 12:45:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 3111. [2023-04-01 12:45:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 3107 states have (on average 1.3997425168973285) internal successors, (4349), 3107 states have internal predecessors, (4349), 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 12:45:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 4352 transitions. [2023-04-01 12:45:48,273 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 4352 transitions. Word has length 146 [2023-04-01 12:45:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:48,273 INFO L495 AbstractCegarLoop]: Abstraction has 3111 states and 4352 transitions. [2023-04-01 12:45:48,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 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 12:45:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 4352 transitions. [2023-04-01 12:45:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-04-01 12:45:48,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:48,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:45:48,284 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:48,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1165865510, now seen corresponding path program 1 times [2023-04-01 12:45:48,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:48,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24348212] [2023-04-01 12:45:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:48,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:48,554 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 12:45:48,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:48,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24348212] [2023-04-01 12:45:48,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24348212] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:48,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:48,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:45:48,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488687674] [2023-04-01 12:45:48,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:48,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:45:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:48,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:45:48,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:48,557 INFO L87 Difference]: Start difference. First operand 3111 states and 4352 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 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 12:45:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:50,399 INFO L93 Difference]: Finished difference Result 11606 states and 16158 transitions. [2023-04-01 12:45:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:45:50,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 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 155 [2023-04-01 12:45:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:50,434 INFO L225 Difference]: With dead ends: 11606 [2023-04-01 12:45:50,435 INFO L226 Difference]: Without dead ends: 8568 [2023-04-01 12:45:50,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:45:50,447 INFO L413 NwaCegarLoop]: 1677 mSDtfsCounter, 1350 mSDsluCounter, 4010 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 5687 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:50,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 5687 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 12:45:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8568 states. [2023-04-01 12:45:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8568 to 4278. [2023-04-01 12:45:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4274 states have (on average 1.3640617688348151) internal successors, (5830), 4274 states have internal predecessors, (5830), 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 12:45:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 5833 transitions. [2023-04-01 12:45:51,123 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 5833 transitions. Word has length 155 [2023-04-01 12:45:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:51,124 INFO L495 AbstractCegarLoop]: Abstraction has 4278 states and 5833 transitions. [2023-04-01 12:45:51,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 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 12:45:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 5833 transitions. [2023-04-01 12:45:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 12:45:51,135 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:51,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:51,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:45:51,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:51,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1851082270, now seen corresponding path program 1 times [2023-04-01 12:45:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:51,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831910546] [2023-04-01 12:45:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:51,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:51,544 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 12:45:51,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831910546] [2023-04-01 12:45:51,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831910546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:51,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:51,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 12:45:51,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253556333] [2023-04-01 12:45:51,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:51,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 12:45:51,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 12:45:51,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:45:51,547 INFO L87 Difference]: Start difference. First operand 4278 states and 5833 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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 12:45:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:52,359 INFO L93 Difference]: Finished difference Result 8485 states and 11582 transitions. [2023-04-01 12:45:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:45:52,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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 157 [2023-04-01 12:45:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:52,375 INFO L225 Difference]: With dead ends: 8485 [2023-04-01 12:45:52,375 INFO L226 Difference]: Without dead ends: 4280 [2023-04-01 12:45:52,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:45:52,385 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 1081 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:52,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 1210 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:45:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2023-04-01 12:45:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 4278. [2023-04-01 12:45:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4274 states have (on average 1.3628919045390735) internal successors, (5825), 4274 states have internal predecessors, (5825), 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 12:45:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 5828 transitions. [2023-04-01 12:45:52,960 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 5828 transitions. Word has length 157 [2023-04-01 12:45:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:52,961 INFO L495 AbstractCegarLoop]: Abstraction has 4278 states and 5828 transitions. [2023-04-01 12:45:52,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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 12:45:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 5828 transitions. [2023-04-01 12:45:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 12:45:52,972 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:52,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:52,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:45:52,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:52,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1255789889, now seen corresponding path program 1 times [2023-04-01 12:45:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975398339] [2023-04-01 12:45:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:52,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:53,106 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 12:45:53,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:53,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975398339] [2023-04-01 12:45:53,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975398339] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:53,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:53,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:45:53,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507541991] [2023-04-01 12:45:53,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:53,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:45:53,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:45:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:45:53,110 INFO L87 Difference]: Start difference. First operand 4278 states and 5828 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 12:45:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:53,976 INFO L93 Difference]: Finished difference Result 10581 states and 14524 transitions. [2023-04-01 12:45:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:45:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 157 [2023-04-01 12:45:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:54,017 INFO L225 Difference]: With dead ends: 10581 [2023-04-01 12:45:54,017 INFO L226 Difference]: Without dead ends: 6375 [2023-04-01 12:45:54,026 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 12:45:54,028 INFO L413 NwaCegarLoop]: 468 mSDtfsCounter, 237 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:54,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 652 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:45:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2023-04-01 12:45:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6373. [2023-04-01 12:45:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6369 states have (on average 1.3670905950698697) internal successors, (8707), 6369 states have internal predecessors, (8707), 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 12:45:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 8710 transitions. [2023-04-01 12:45:54,785 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 8710 transitions. Word has length 157 [2023-04-01 12:45:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:54,786 INFO L495 AbstractCegarLoop]: Abstraction has 6373 states and 8710 transitions. [2023-04-01 12:45:54,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 12:45:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 8710 transitions. [2023-04-01 12:45:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:45:54,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:54,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:54,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:45:54,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:54,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1974854354, now seen corresponding path program 1 times [2023-04-01 12:45:54,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:54,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771585550] [2023-04-01 12:45:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:54,993 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 12:45:54,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771585550] [2023-04-01 12:45:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771585550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:54,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:54,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878087156] [2023-04-01 12:45:54,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:54,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:54,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:54,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:54,995 INFO L87 Difference]: Start difference. First operand 6373 states and 8710 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:45:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:56,010 INFO L93 Difference]: Finished difference Result 12698 states and 17368 transitions. [2023-04-01 12:45:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 158 [2023-04-01 12:45:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:56,028 INFO L225 Difference]: With dead ends: 12698 [2023-04-01 12:45:56,028 INFO L226 Difference]: Without dead ends: 6373 [2023-04-01 12:45:56,043 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 12:45:56,044 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 838 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:56,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 166 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:45:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2023-04-01 12:45:57,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 6373. [2023-04-01 12:45:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6369 states have (on average 1.3477783011461768) internal successors, (8584), 6369 states have internal predecessors, (8584), 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 12:45:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 8587 transitions. [2023-04-01 12:45:57,053 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 8587 transitions. Word has length 158 [2023-04-01 12:45:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:57,053 INFO L495 AbstractCegarLoop]: Abstraction has 6373 states and 8587 transitions. [2023-04-01 12:45:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:45:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 8587 transitions. [2023-04-01 12:45:57,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:45:57,070 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:57,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:57,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:45:57,070 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:57,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1042462441, now seen corresponding path program 1 times [2023-04-01 12:45:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:57,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265082628] [2023-04-01 12:45:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:57,245 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 12:45:57,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:57,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265082628] [2023-04-01 12:45:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265082628] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:57,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:57,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:57,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533806577] [2023-04-01 12:45:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:57,254 INFO L87 Difference]: Start difference. First operand 6373 states and 8587 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:45:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:45:58,222 INFO L93 Difference]: Finished difference Result 12692 states and 17115 transitions. [2023-04-01 12:45:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:45:58,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 158 [2023-04-01 12:45:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:45:58,241 INFO L225 Difference]: With dead ends: 12692 [2023-04-01 12:45:58,241 INFO L226 Difference]: Without dead ends: 6373 [2023-04-01 12:45:58,254 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 12:45:58,255 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 810 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:45:58,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 174 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:45:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2023-04-01 12:45:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 6373. [2023-04-01 12:45:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6369 states have (on average 1.3319202386559899) internal successors, (8483), 6369 states have internal predecessors, (8483), 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 12:45:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 8486 transitions. [2023-04-01 12:45:58,975 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 8486 transitions. Word has length 158 [2023-04-01 12:45:58,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:45:58,975 INFO L495 AbstractCegarLoop]: Abstraction has 6373 states and 8486 transitions. [2023-04-01 12:45:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:45:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 8486 transitions. [2023-04-01 12:45:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:45:58,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:45:58,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:58,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:45:58,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:45:58,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:45:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash -487792905, now seen corresponding path program 1 times [2023-04-01 12:45:58,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:45:58,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22841710] [2023-04-01 12:45:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:45:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:45:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:45:59,163 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 12:45:59,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:45:59,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22841710] [2023-04-01 12:45:59,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22841710] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:45:59,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:45:59,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:45:59,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158060308] [2023-04-01 12:45:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:45:59,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:45:59,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:45:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:45:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:45:59,165 INFO L87 Difference]: Start difference. First operand 6373 states and 8486 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:46:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:00,274 INFO L93 Difference]: Finished difference Result 12680 states and 16898 transitions. [2023-04-01 12:46:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:46:00,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:00,291 INFO L225 Difference]: With dead ends: 12680 [2023-04-01 12:46:00,291 INFO L226 Difference]: Without dead ends: 6373 [2023-04-01 12:46:00,306 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 12:46:00,307 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 769 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:00,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 190 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:46:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2023-04-01 12:46:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 6373. [2023-04-01 12:46:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6369 states have (on average 1.317004239284032) internal successors, (8388), 6369 states have internal predecessors, (8388), 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 12:46:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 8391 transitions. [2023-04-01 12:46:01,398 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 8391 transitions. Word has length 158 [2023-04-01 12:46:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:01,398 INFO L495 AbstractCegarLoop]: Abstraction has 6373 states and 8391 transitions. [2023-04-01 12:46:01,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:46:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 8391 transitions. [2023-04-01 12:46:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:01,412 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:01,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:01,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:46:01,413 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:01,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1230858369, now seen corresponding path program 1 times [2023-04-01 12:46:01,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:01,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325463880] [2023-04-01 12:46:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:01,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:01,591 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 12:46:01,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:01,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325463880] [2023-04-01 12:46:01,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325463880] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:01,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:01,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:46:01,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023080872] [2023-04-01 12:46:01,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:01,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:46:01,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:46:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:46:01,594 INFO L87 Difference]: Start difference. First operand 6373 states and 8391 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:46:02,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:02,578 INFO L93 Difference]: Finished difference Result 12704 states and 16738 transitions. [2023-04-01 12:46:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:46:02,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:02,596 INFO L225 Difference]: With dead ends: 12704 [2023-04-01 12:46:02,596 INFO L226 Difference]: Without dead ends: 6373 [2023-04-01 12:46:02,610 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 12:46:02,611 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 806 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:02,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 158 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:46:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2023-04-01 12:46:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 6373. [2023-04-01 12:46:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6369 states have (on average 1.2867012089810017) internal successors, (8195), 6369 states have internal predecessors, (8195), 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 12:46:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 8198 transitions. [2023-04-01 12:46:03,492 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 8198 transitions. Word has length 158 [2023-04-01 12:46:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 6373 states and 8198 transitions. [2023-04-01 12:46:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 12:46:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 8198 transitions. [2023-04-01 12:46:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:03,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:03,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:03,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:46:03,508 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:03,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1498097318, now seen corresponding path program 1 times [2023-04-01 12:46:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:03,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488310905] [2023-04-01 12:46:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:03,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:03,667 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 12:46:03,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488310905] [2023-04-01 12:46:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488310905] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:03,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:03,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:03,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002171467] [2023-04-01 12:46:03,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:03,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:03,669 INFO L87 Difference]: Start difference. First operand 6373 states and 8198 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:04,329 INFO L93 Difference]: Finished difference Result 10019 states and 12946 transitions. [2023-04-01 12:46:04,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:04,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:04,340 INFO L225 Difference]: With dead ends: 10019 [2023-04-01 12:46:04,340 INFO L226 Difference]: Without dead ends: 4245 [2023-04-01 12:46:04,352 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 12:46:04,353 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 104 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:04,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 434 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2023-04-01 12:46:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3803. [2023-04-01 12:46:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3799 states have (on average 1.280600157936299) internal successors, (4865), 3799 states have internal predecessors, (4865), 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 12:46:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 4868 transitions. [2023-04-01 12:46:05,019 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 4868 transitions. Word has length 158 [2023-04-01 12:46:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:05,020 INFO L495 AbstractCegarLoop]: Abstraction has 3803 states and 4868 transitions. [2023-04-01 12:46:05,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 4868 transitions. [2023-04-01 12:46:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:05,027 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:05,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:05,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:46:05,027 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:05,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 153676295, now seen corresponding path program 1 times [2023-04-01 12:46:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:05,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974671551] [2023-04-01 12:46:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:05,189 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 12:46:05,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:05,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974671551] [2023-04-01 12:46:05,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974671551] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:05,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:05,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:05,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334096045] [2023-04-01 12:46:05,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:05,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:05,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:05,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:05,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:05,190 INFO L87 Difference]: Start difference. First operand 3803 states and 4868 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:05,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:05,615 INFO L93 Difference]: Finished difference Result 5379 states and 6908 transitions. [2023-04-01 12:46:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:05,619 INFO L225 Difference]: With dead ends: 5379 [2023-04-01 12:46:05,619 INFO L226 Difference]: Without dead ends: 2033 [2023-04-01 12:46:05,625 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 12:46:05,626 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 90 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:05,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 423 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2023-04-01 12:46:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2031. [2023-04-01 12:46:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2027 states have (on average 1.2604834731129748) internal successors, (2555), 2027 states have internal predecessors, (2555), 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 12:46:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2558 transitions. [2023-04-01 12:46:06,127 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2558 transitions. Word has length 158 [2023-04-01 12:46:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:06,127 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 2558 transitions. [2023-04-01 12:46:06,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2558 transitions. [2023-04-01 12:46:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:06,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:06,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:46:06,133 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:06,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash -747107973, now seen corresponding path program 1 times [2023-04-01 12:46:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:06,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637549626] [2023-04-01 12:46:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:06,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:06,337 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 12:46:06,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637549626] [2023-04-01 12:46:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637549626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:06,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146214418] [2023-04-01 12:46:06,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:06,339 INFO L87 Difference]: Start difference. First operand 2031 states and 2558 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:06,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:06,604 INFO L93 Difference]: Finished difference Result 2741 states and 3463 transitions. [2023-04-01 12:46:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:06,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:06,608 INFO L225 Difference]: With dead ends: 2741 [2023-04-01 12:46:06,608 INFO L226 Difference]: Without dead ends: 1081 [2023-04-01 12:46:06,611 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 12:46:06,611 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 80 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:06,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 420 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2023-04-01 12:46:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1079. [2023-04-01 12:46:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1075 states have (on average 1.238139534883721) internal successors, (1331), 1075 states have internal predecessors, (1331), 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 12:46:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1334 transitions. [2023-04-01 12:46:06,825 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1334 transitions. Word has length 158 [2023-04-01 12:46:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:06,826 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1334 transitions. [2023-04-01 12:46:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1334 transitions. [2023-04-01 12:46:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:06,828 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:06,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:06,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:46:06,829 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:06,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1669156094, now seen corresponding path program 1 times [2023-04-01 12:46:06,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:06,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347556677] [2023-04-01 12:46:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:06,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:07,000 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 12:46:07,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:07,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347556677] [2023-04-01 12:46:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347556677] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:07,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:07,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768344266] [2023-04-01 12:46:07,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:07,002 INFO L87 Difference]: Start difference. First operand 1079 states and 1334 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:07,110 INFO L93 Difference]: Finished difference Result 1297 states and 1604 transitions. [2023-04-01 12:46:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:07,111 INFO L225 Difference]: With dead ends: 1297 [2023-04-01 12:46:07,112 INFO L226 Difference]: Without dead ends: 457 [2023-04-01 12:46:07,113 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 12:46:07,114 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 97 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:07,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 337 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-04-01 12:46:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 455. [2023-04-01 12:46:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 451 states have (on average 1.2106430155210643) internal successors, (546), 451 states have internal predecessors, (546), 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 12:46:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 549 transitions. [2023-04-01 12:46:07,177 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 549 transitions. Word has length 158 [2023-04-01 12:46:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:07,177 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 549 transitions. [2023-04-01 12:46:07,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 549 transitions. [2023-04-01 12:46:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:07,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:07,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:07,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:46:07,179 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:07,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:07,179 INFO L85 PathProgramCache]: Analyzing trace with hash 366961576, now seen corresponding path program 1 times [2023-04-01 12:46:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:07,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61517960] [2023-04-01 12:46:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:07,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:07,326 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 12:46:07,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61517960] [2023-04-01 12:46:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61517960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:07,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:07,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:07,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880195998] [2023-04-01 12:46:07,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:07,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:07,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:07,328 INFO L87 Difference]: Start difference. First operand 455 states and 549 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:07,412 INFO L93 Difference]: Finished difference Result 604 states and 733 transitions. [2023-04-01 12:46:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:07,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:07,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:07,414 INFO L225 Difference]: With dead ends: 604 [2023-04-01 12:46:07,414 INFO L226 Difference]: Without dead ends: 284 [2023-04-01 12:46:07,414 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 12:46:07,415 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 56 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:07,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 362 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-04-01 12:46:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 282. [2023-04-01 12:46:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 278 states have (on average 1.1798561151079137) internal successors, (328), 278 states have internal predecessors, (328), 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 12:46:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 331 transitions. [2023-04-01 12:46:07,468 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 331 transitions. Word has length 158 [2023-04-01 12:46:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:07,469 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 331 transitions. [2023-04-01 12:46:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 12:46:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 331 transitions. [2023-04-01 12:46:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:07,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:07,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:07,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-01 12:46:07,470 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:07,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash -515918005, now seen corresponding path program 1 times [2023-04-01 12:46:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:07,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703219185] [2023-04-01 12:46:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:07,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:07,967 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 12:46:07,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:07,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703219185] [2023-04-01 12:46:07,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703219185] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:07,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:07,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:46:07,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550323663] [2023-04-01 12:46:07,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:07,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:46:07,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:46:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:46:07,969 INFO L87 Difference]: Start difference. First operand 282 states and 331 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 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 12:46:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:08,164 INFO L93 Difference]: Finished difference Result 504 states and 597 transitions. [2023-04-01 12:46:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:46:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:08,165 INFO L225 Difference]: With dead ends: 504 [2023-04-01 12:46:08,165 INFO L226 Difference]: Without dead ends: 282 [2023-04-01 12:46:08,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-01 12:46:08,167 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 609 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:08,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 152 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:46:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-04-01 12:46:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2023-04-01 12:46:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 278 states have (on average 1.1618705035971224) internal successors, (323), 278 states have internal predecessors, (323), 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 12:46:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 326 transitions. [2023-04-01 12:46:08,240 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 326 transitions. Word has length 158 [2023-04-01 12:46:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:08,240 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 326 transitions. [2023-04-01 12:46:08,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 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 12:46:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 326 transitions. [2023-04-01 12:46:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 12:46:08,241 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:08,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:08,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-01 12:46:08,242 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:08,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash -825083071, now seen corresponding path program 1 times [2023-04-01 12:46:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:08,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820264608] [2023-04-01 12:46:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:08,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:08,709 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 12:46:08,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:08,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820264608] [2023-04-01 12:46:08,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820264608] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:08,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:46:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257469739] [2023-04-01 12:46:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:46:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:46:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:46:08,711 INFO L87 Difference]: Start difference. First operand 282 states and 326 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 12:46:08,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:08,816 INFO L93 Difference]: Finished difference Result 437 states and 511 transitions. [2023-04-01 12:46:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:46:08,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 158 [2023-04-01 12:46:08,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:08,817 INFO L225 Difference]: With dead ends: 437 [2023-04-01 12:46:08,817 INFO L226 Difference]: Without dead ends: 282 [2023-04-01 12:46:08,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:46:08,818 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 1 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:08,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 598 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-04-01 12:46:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2023-04-01 12:46:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 278 states have (on average 1.1546762589928057) internal successors, (321), 278 states have internal predecessors, (321), 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 12:46:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 324 transitions. [2023-04-01 12:46:08,880 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 324 transitions. Word has length 158 [2023-04-01 12:46:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:08,881 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 324 transitions. [2023-04-01 12:46:08,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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 12:46:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 324 transitions. [2023-04-01 12:46:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 12:46:08,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:08,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:08,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-01 12:46:08,882 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:08,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1659197058, now seen corresponding path program 1 times [2023-04-01 12:46:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:08,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751548696] [2023-04-01 12:46:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:08,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:08,964 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 12:46:08,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:08,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751548696] [2023-04-01 12:46:08,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751548696] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:08,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:08,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:46:08,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067811217] [2023-04-01 12:46:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:46:08,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:46:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:46:08,966 INFO L87 Difference]: Start difference. First operand 282 states and 324 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 12:46:09,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:09,062 INFO L93 Difference]: Finished difference Result 403 states and 467 transitions. [2023-04-01 12:46:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:46:09,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 160 [2023-04-01 12:46:09,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:09,063 INFO L225 Difference]: With dead ends: 403 [2023-04-01 12:46:09,064 INFO L226 Difference]: Without dead ends: 243 [2023-04-01 12:46:09,064 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 12:46:09,065 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:09,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 380 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-01 12:46:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2023-04-01 12:46:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.1213389121338913) internal successors, (268), 239 states have internal predecessors, (268), 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 12:46:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 271 transitions. [2023-04-01 12:46:09,121 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 271 transitions. Word has length 160 [2023-04-01 12:46:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:09,122 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 271 transitions. [2023-04-01 12:46:09,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 12:46:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 271 transitions. [2023-04-01 12:46:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-01 12:46:09,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:09,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:09,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 12:46:09,123 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:09,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:09,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1703329121, now seen corresponding path program 1 times [2023-04-01 12:46:09,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:09,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763762657] [2023-04-01 12:46:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:09,700 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 12:46:09,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:09,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763762657] [2023-04-01 12:46:09,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763762657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:09,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:09,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 12:46:09,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341427116] [2023-04-01 12:46:09,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:09,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 12:46:09,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:09,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 12:46:09,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 12:46:09,702 INFO L87 Difference]: Start difference. First operand 243 states and 271 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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 12:46:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:09,798 INFO L93 Difference]: Finished difference Result 338 states and 382 transitions. [2023-04-01 12:46:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 12:46:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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 164 [2023-04-01 12:46:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:09,799 INFO L225 Difference]: With dead ends: 338 [2023-04-01 12:46:09,799 INFO L226 Difference]: Without dead ends: 241 [2023-04-01 12:46:09,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:46:09,801 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:09,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 574 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:46:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-04-01 12:46:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-04-01 12:46:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.1139240506329113) internal successors, (264), 237 states have internal predecessors, (264), 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 12:46:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 267 transitions. [2023-04-01 12:46:09,852 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 267 transitions. Word has length 164 [2023-04-01 12:46:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:09,852 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 267 transitions. [2023-04-01 12:46:09,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 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 12:46:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 267 transitions. [2023-04-01 12:46:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 12:46:09,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:09,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:09,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-01 12:46:09,854 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:09,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1539825021, now seen corresponding path program 1 times [2023-04-01 12:46:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:09,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379698555] [2023-04-01 12:46:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:46:10,197 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 12:46:10,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:46:10,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379698555] [2023-04-01 12:46:10,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379698555] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:46:10,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:46:10,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 12:46:10,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285789686] [2023-04-01 12:46:10,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:46:10,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 12:46:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:46:10,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 12:46:10,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:46:10,199 INFO L87 Difference]: Start difference. First operand 241 states and 267 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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 12:46:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:46:10,383 INFO L93 Difference]: Finished difference Result 300 states and 333 transitions. [2023-04-01 12:46:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 12:46:10,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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 170 [2023-04-01 12:46:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:46:10,385 INFO L225 Difference]: With dead ends: 300 [2023-04-01 12:46:10,385 INFO L226 Difference]: Without dead ends: 298 [2023-04-01 12:46:10,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-04-01 12:46:10,386 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 274 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:46:10,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 857 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:46:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-04-01 12:46:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 243. [2023-04-01 12:46:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.108786610878661) internal successors, (265), 239 states have internal predecessors, (265), 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 12:46:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 268 transitions. [2023-04-01 12:46:10,456 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 268 transitions. Word has length 170 [2023-04-01 12:46:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:46:10,456 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 268 transitions. [2023-04-01 12:46:10,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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 12:46:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 268 transitions. [2023-04-01 12:46:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 12:46:10,457 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:46:10,457 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:46:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-01 12:46:10,458 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:46:10,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:46:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1196108639, now seen corresponding path program 1 times [2023-04-01 12:46:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:46:10,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207377927] [2023-04-01 12:46:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:46:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:46:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat