/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:07:45,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:07:45,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:07:45,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:07:45,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:07:45,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:07:45,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:07:45,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:07:45,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:07:45,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:07:45,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:07:45,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:07:45,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:07:45,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:07:45,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:07:45,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:07:45,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:07:45,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:07:45,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:07:45,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:07:45,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:07:45,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:07:45,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:07:45,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:07:45,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:07:45,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:07:45,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:07:45,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:07:45,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:07:45,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:07:45,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:07:45,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:07:45,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:07:45,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:07:45,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:07:45,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:07:45,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:07:45,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:07:45,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:07:45,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:07:45,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:07:45,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:07:45,208 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:07:45,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:07:45,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:07:45,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:07:45,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:07:45,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:07:45,210 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:07:45,210 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:07:45,210 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:07:45,210 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:07:45,210 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:07:45,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:07:45,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:07:45,210 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:07:45,211 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:07:45,211 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:07:45,211 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:07:45,211 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:07:45,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:07:45,211 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:07:45,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:07:45,213 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:07:45,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:07:45,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:07:45,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:07:45,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:07:45,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:07:45,213 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:07:45,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:07:45,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:07:45,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:07:45,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:07:45,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:07:45,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:07:45,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:07:45,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:07:45,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:07:45,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:07:45,407 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:07:45,407 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:07:45,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:07:46,438 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:07:46,650 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:07:46,651 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:07:46,670 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f777bb35/cc14259628e4433aabcf0d25d25a2815/FLAGdc0614f12 [2023-04-03 02:07:46,680 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f777bb35/cc14259628e4433aabcf0d25d25a2815 [2023-04-03 02:07:46,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:07:46,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:07:46,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:07:46,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:07:46,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:07:46,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:07:46" (1/1) ... [2023-04-03 02:07:46,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4886b52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:46, skipping insertion in model container [2023-04-03 02:07:46,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:07:46" (1/1) ... [2023-04-03 02:07:46,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:07:46,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:07:47,083 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c[65601,65614] [2023-04-03 02:07:47,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:07:47,098 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:07:47,162 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c[65601,65614] [2023-04-03 02:07:47,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:07:47,177 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:07:47,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47 WrapperNode [2023-04-03 02:07:47,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:07:47,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:07:47,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:07:47,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:07:47,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:07:47,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:07:47,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:07:47,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:07:47,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (1/1) ... [2023-04-03 02:07:47,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:07:47,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:07:47,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:07:47,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:07:47,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 02:07:47,386 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 02:07:47,387 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:07:47,387 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:07:47,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:07:47,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:07:47,387 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:07:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:07:47,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:07:47,577 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:07:47,579 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:07:48,590 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:07:49,702 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:07:49,702 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:07:49,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:07:49 BoogieIcfgContainer [2023-04-03 02:07:49,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:07:49,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:07:49,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:07:49,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:07:49,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:07:46" (1/3) ... [2023-04-03 02:07:49,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1b8e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:07:49, skipping insertion in model container [2023-04-03 02:07:49,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:07:47" (2/3) ... [2023-04-03 02:07:49,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1b8e67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:07:49, skipping insertion in model container [2023-04-03 02:07:49,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:07:49" (3/3) ... [2023-04-03 02:07:49,717 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:07:49,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:07:49,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:07:49,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:07:49,788 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;@1928a35a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:07:49,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:07:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 02:07:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-03 02:07:49,819 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:07:49,820 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] [2023-04-03 02:07:49,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:07:49,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:07:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1950621799, now seen corresponding path program 1 times [2023-04-03 02:07:49,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:07:49,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363429704] [2023-04-03 02:07:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:07:49,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:07:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:07:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:07:59,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:07:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363429704] [2023-04-03 02:07:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363429704] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:07:59,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:07:59,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:07:59,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87834930] [2023-04-03 02:07:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:07:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:07:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:07:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:07:59,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:07:59,814 INFO L87 Difference]: Start difference. First operand has 478 states, 454 states have (on average 1.6938325991189427) internal successors, (769), 456 states have internal predecessors, (769), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:04,264 INFO L93 Difference]: Finished difference Result 578 states and 929 transitions. [2023-04-03 02:08:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:08:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-03 02:08:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:04,277 INFO L225 Difference]: With dead ends: 578 [2023-04-03 02:08:04,278 INFO L226 Difference]: Without dead ends: 533 [2023-04-03 02:08:04,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:08:04,283 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6458 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7173 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6461 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 7363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 7173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:04,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6461 Valid, 142 Invalid, 7363 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [190 Valid, 7173 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-03 02:08:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-04-03 02:08:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 509. [2023-04-03 02:08:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6821052631578948) internal successors, (799), 476 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-03 02:08:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 833 transitions. [2023-04-03 02:08:04,348 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 833 transitions. Word has length 160 [2023-04-03 02:08:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:04,349 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 833 transitions. [2023-04-03 02:08:04,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 833 transitions. [2023-04-03 02:08:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-03 02:08:04,352 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:04,352 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] [2023-04-03 02:08:04,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:08:04,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:04,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash 265205961, now seen corresponding path program 1 times [2023-04-03 02:08:04,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:04,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468665752] [2023-04-03 02:08:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:04,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:08,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:08,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468665752] [2023-04-03 02:08:08,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468665752] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:08,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309276185] [2023-04-03 02:08:08,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:08,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:08,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:08,253 INFO L87 Difference]: Start difference. First operand 509 states and 833 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:10,628 INFO L93 Difference]: Finished difference Result 589 states and 935 transitions. [2023-04-03 02:08:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:10,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-03 02:08:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:10,632 INFO L225 Difference]: With dead ends: 589 [2023-04-03 02:08:10,632 INFO L226 Difference]: Without dead ends: 540 [2023-04-03 02:08:10,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:10,634 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 847 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:10,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 96 Invalid, 5558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 5520 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:08:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-04-03 02:08:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 509. [2023-04-03 02:08:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.68) internal successors, (798), 476 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 831 transitions. [2023-04-03 02:08:10,685 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 831 transitions. Word has length 161 [2023-04-03 02:08:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:10,685 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 831 transitions. [2023-04-03 02:08:10,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 831 transitions. [2023-04-03 02:08:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-03 02:08:10,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:10,687 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] [2023-04-03 02:08:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:08:10,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:10,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash 663633936, now seen corresponding path program 1 times [2023-04-03 02:08:10,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:10,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596868171] [2023-04-03 02:08:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:14,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596868171] [2023-04-03 02:08:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596868171] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:14,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:14,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:14,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366961824] [2023-04-03 02:08:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:14,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:14,354 INFO L87 Difference]: Start difference. First operand 509 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:16,651 INFO L93 Difference]: Finished difference Result 583 states and 919 transitions. [2023-04-03 02:08:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-03 02:08:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:16,655 INFO L225 Difference]: With dead ends: 583 [2023-04-03 02:08:16,655 INFO L226 Difference]: Without dead ends: 539 [2023-04-03 02:08:16,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:16,656 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1642 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 6355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:16,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 99 Invalid, 6355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-03 02:08:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-04-03 02:08:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 509. [2023-04-03 02:08:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6778947368421053) internal successors, (797), 476 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 830 transitions. [2023-04-03 02:08:16,707 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 830 transitions. Word has length 162 [2023-04-03 02:08:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:16,708 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 830 transitions. [2023-04-03 02:08:16,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 830 transitions. [2023-04-03 02:08:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-03 02:08:16,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:16,710 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] [2023-04-03 02:08:16,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:08:16,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:16,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1236710674, now seen corresponding path program 1 times [2023-04-03 02:08:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:16,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236998731] [2023-04-03 02:08:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:16,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:20,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236998731] [2023-04-03 02:08:20,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236998731] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:20,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:20,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:20,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604723137] [2023-04-03 02:08:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:20,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:20,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:20,190 INFO L87 Difference]: Start difference. First operand 509 states and 830 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:22,611 INFO L93 Difference]: Finished difference Result 589 states and 924 transitions. [2023-04-03 02:08:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:22,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-03 02:08:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:22,615 INFO L225 Difference]: With dead ends: 589 [2023-04-03 02:08:22,615 INFO L226 Difference]: Without dead ends: 545 [2023-04-03 02:08:22,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:22,617 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 857 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5556 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:22,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 100 Invalid, 5592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 5556 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-03 02:08:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-04-03 02:08:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 509. [2023-04-03 02:08:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6757894736842105) internal successors, (796), 476 states have internal predecessors, (796), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 829 transitions. [2023-04-03 02:08:22,649 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 829 transitions. Word has length 163 [2023-04-03 02:08:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:22,650 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 829 transitions. [2023-04-03 02:08:22,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 829 transitions. [2023-04-03 02:08:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-03 02:08:22,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:22,651 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] [2023-04-03 02:08:22,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:08:22,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:22,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1366035527, now seen corresponding path program 1 times [2023-04-03 02:08:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:22,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065173949] [2023-04-03 02:08:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:22,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:26,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065173949] [2023-04-03 02:08:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065173949] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:26,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:26,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440046308] [2023-04-03 02:08:26,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:26,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:26,240 INFO L87 Difference]: Start difference. First operand 509 states and 829 transitions. Second operand has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:28,321 INFO L93 Difference]: Finished difference Result 595 states and 929 transitions. [2023-04-03 02:08:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 164 [2023-04-03 02:08:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:28,325 INFO L225 Difference]: With dead ends: 595 [2023-04-03 02:08:28,325 INFO L226 Difference]: Without dead ends: 551 [2023-04-03 02:08:28,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:28,332 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 865 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:28,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 102 Invalid, 5620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-03 02:08:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-04-03 02:08:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 509. [2023-04-03 02:08:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.6736842105263159) internal successors, (795), 476 states have internal predecessors, (795), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 828 transitions. [2023-04-03 02:08:28,366 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 828 transitions. Word has length 164 [2023-04-03 02:08:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:28,366 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 828 transitions. [2023-04-03 02:08:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.571428571428573) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 828 transitions. [2023-04-03 02:08:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-04-03 02:08:28,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:28,368 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] [2023-04-03 02:08:28,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:08:28,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:28,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash 659922267, now seen corresponding path program 1 times [2023-04-03 02:08:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487046316] [2023-04-03 02:08:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:32,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487046316] [2023-04-03 02:08:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487046316] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:32,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:32,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:32,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670133197] [2023-04-03 02:08:32,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:32,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:32,065 INFO L87 Difference]: Start difference. First operand 509 states and 828 transitions. Second operand has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:34,741 INFO L93 Difference]: Finished difference Result 601 states and 934 transitions. [2023-04-03 02:08:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 165 [2023-04-03 02:08:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:34,744 INFO L225 Difference]: With dead ends: 601 [2023-04-03 02:08:34,744 INFO L226 Difference]: Without dead ends: 557 [2023-04-03 02:08:34,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:34,745 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 859 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6393 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 6419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 6393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:34,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 111 Invalid, 6419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 6393 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-03 02:08:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-04-03 02:08:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 509. [2023-04-03 02:08:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 475 states have (on average 1.671578947368421) internal successors, (794), 476 states have internal predecessors, (794), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 827 transitions. [2023-04-03 02:08:34,785 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 827 transitions. Word has length 165 [2023-04-03 02:08:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:34,786 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 827 transitions. [2023-04-03 02:08:34,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.714285714285715) internal successors, (145), 9 states have internal predecessors, (145), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 827 transitions. [2023-04-03 02:08:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-03 02:08:34,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:34,787 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] [2023-04-03 02:08:34,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:08:34,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:34,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash -154347965, now seen corresponding path program 1 times [2023-04-03 02:08:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:34,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528122703] [2023-04-03 02:08:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:34,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:41,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:41,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528122703] [2023-04-03 02:08:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528122703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:41,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:41,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-03 02:08:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540815630] [2023-04-03 02:08:41,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:41,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-03 02:08:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-03 02:08:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-04-03 02:08:41,791 INFO L87 Difference]: Start difference. First operand 509 states and 827 transitions. Second operand has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:46,389 INFO L93 Difference]: Finished difference Result 631 states and 977 transitions. [2023-04-03 02:08:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-03 02:08:46,390 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 167 [2023-04-03 02:08:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:46,392 INFO L225 Difference]: With dead ends: 631 [2023-04-03 02:08:46,392 INFO L226 Difference]: Without dead ends: 583 [2023-04-03 02:08:46,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=631, Invalid=2125, Unknown=0, NotChecked=0, Total=2756 [2023-04-03 02:08:46,394 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 5636 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8873 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5639 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 9072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 8873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:46,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5639 Valid, 204 Invalid, 9072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 8873 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-03 02:08:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-04-03 02:08:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 513. [2023-04-03 02:08:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 479 states have (on average 1.663883089770355) internal successors, (797), 480 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 830 transitions. [2023-04-03 02:08:46,445 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 830 transitions. Word has length 167 [2023-04-03 02:08:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:46,445 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 830 transitions. [2023-04-03 02:08:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 12 states have (on average 12.25) internal successors, (147), 14 states have internal predecessors, (147), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:08:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 830 transitions. [2023-04-03 02:08:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-03 02:08:46,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:46,447 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] [2023-04-03 02:08:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:08:46,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:46,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash -528149072, now seen corresponding path program 1 times [2023-04-03 02:08:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861106772] [2023-04-03 02:08:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:48,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:48,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861106772] [2023-04-03 02:08:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861106772] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:48,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:08:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794056486] [2023-04-03 02:08:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:48,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:08:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:08:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:08:48,339 INFO L87 Difference]: Start difference. First operand 513 states and 830 transitions. Second operand has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:08:50,571 INFO L93 Difference]: Finished difference Result 587 states and 920 transitions. [2023-04-03 02:08:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:08:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 168 [2023-04-03 02:08:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:08:50,575 INFO L225 Difference]: With dead ends: 587 [2023-04-03 02:08:50,576 INFO L226 Difference]: Without dead ends: 535 [2023-04-03 02:08:50,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:08:50,579 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 831 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:08:50,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 95 Invalid, 5560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-03 02:08:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2023-04-03 02:08:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 510. [2023-04-03 02:08:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6554621848739495) internal successors, (788), 477 states have internal predecessors, (788), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:08:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 821 transitions. [2023-04-03 02:08:50,622 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 821 transitions. Word has length 168 [2023-04-03 02:08:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:08:50,622 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 821 transitions. [2023-04-03 02:08:50,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 21.142857142857142) internal successors, (148), 9 states have internal predecessors, (148), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-03 02:08:50,623 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 821 transitions. [2023-04-03 02:08:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-03 02:08:50,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:08:50,624 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] [2023-04-03 02:08:50,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:08:50,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:08:50,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:08:50,624 INFO L85 PathProgramCache]: Analyzing trace with hash -558277482, now seen corresponding path program 1 times [2023-04-03 02:08:50,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:08:50,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847770623] [2023-04-03 02:08:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:08:50,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:08:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:08:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:08:57,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:08:57,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847770623] [2023-04-03 02:08:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847770623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:08:57,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:08:57,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-03 02:08:57,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840732632] [2023-04-03 02:08:57,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:08:57,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-03 02:08:57,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:08:57,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-03 02:08:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-03 02:08:57,126 INFO L87 Difference]: Start difference. First operand 510 states and 821 transitions. Second operand has 23 states, 11 states have (on average 13.636363636363637) internal successors, (150), 13 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:09:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:09:01,218 INFO L93 Difference]: Finished difference Result 583 states and 906 transitions. [2023-04-03 02:09:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-03 02:09:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 13.636363636363637) internal successors, (150), 13 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 170 [2023-04-03 02:09:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:09:01,221 INFO L225 Difference]: With dead ends: 583 [2023-04-03 02:09:01,221 INFO L226 Difference]: Without dead ends: 537 [2023-04-03 02:09:01,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-03 02:09:01,222 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6295 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 7205 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6298 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 7375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 7205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:09:01,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6298 Valid, 148 Invalid, 7375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 7205 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-03 02:09:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-04-03 02:09:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 510. [2023-04-03 02:09:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.653361344537815) internal successors, (787), 477 states have internal predecessors, (787), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-03 02:09:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 820 transitions. [2023-04-03 02:09:01,275 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 820 transitions. Word has length 170 [2023-04-03 02:09:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:09:01,276 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 820 transitions. [2023-04-03 02:09:01,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 13.636363636363637) internal successors, (150), 13 states have internal predecessors, (150), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-03 02:09:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 820 transitions. [2023-04-03 02:09:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-03 02:09:01,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:09:01,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:09:01,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:09:01,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:09:01,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:09:01,278 INFO L85 PathProgramCache]: Analyzing trace with hash -418449688, now seen corresponding path program 1 times [2023-04-03 02:09:01,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:09:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668979406] [2023-04-03 02:09:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:09:01,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:09:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:09:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:09:05,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:09:05,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668979406] [2023-04-03 02:09:05,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668979406] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:09:05,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:09:05,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:09:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154653432] [2023-04-03 02:09:05,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:09:05,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:09:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:09:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:09:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:09:05,176 INFO L87 Difference]: Start difference. First operand 510 states and 820 transitions. Second operand has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:09:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:09:05,774 INFO L93 Difference]: Finished difference Result 545 states and 864 transitions. [2023-04-03 02:09:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:09:05,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 171 [2023-04-03 02:09:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:09:05,778 INFO L225 Difference]: With dead ends: 545 [2023-04-03 02:09:05,779 INFO L226 Difference]: Without dead ends: 543 [2023-04-03 02:09:05,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:09:05,780 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 36 mSDsluCounter, 7934 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8663 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:09:05,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 8663 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:09:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-04-03 02:09:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 519. [2023-04-03 02:09:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 482 states have (on average 1.6452282157676348) internal successors, (793), 484 states have internal predecessors, (793), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2023-04-03 02:09:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 829 transitions. [2023-04-03 02:09:05,834 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 829 transitions. Word has length 171 [2023-04-03 02:09:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:09:05,834 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 829 transitions. [2023-04-03 02:09:05,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 18.875) internal successors, (151), 10 states have internal predecessors, (151), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-03 02:09:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 829 transitions. [2023-04-03 02:09:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-04-03 02:09:05,836 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:09:05,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:09:05,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 02:09:05,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:09:05,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:09:05,837 INFO L85 PathProgramCache]: Analyzing trace with hash -824213478, now seen corresponding path program 1 times [2023-04-03 02:09:05,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:09:05,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176739211] [2023-04-03 02:09:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:09:05,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:09:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:09:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:09:52,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:09:52,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176739211] [2023-04-03 02:09:52,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176739211] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:09:52,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058098718] [2023-04-03 02:09:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:09:52,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:09:52,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:09:52,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:09:52,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:09:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:09:53,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 118 conjunts are in the unsatisfiable core [2023-04-03 02:09:53,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:10:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:10:43,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:10:44,729 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 39063 disjunctions. This might take some time...