/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:20:52,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:20:52,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:20:52,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:20:52,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:20:52,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:20:52,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:20:52,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:20:52,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:20:52,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:20:52,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:20:52,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:20:52,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:20:52,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:20:52,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:20:52,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:20:52,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:20:52,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:20:52,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:20:52,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:20:52,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:20:52,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:20:52,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:20:52,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:20:52,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:20:52,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:20:52,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:20:52,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:20:52,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:20:52,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:20:52,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:20:52,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:20:52,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:20:52,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:20:52,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:20:52,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:20:52,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:20:52,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:20:52,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:20:52,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:20:52,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:20:52,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:20:52,682 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:20:52,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:20:52,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:20:52,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:20:52,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:20:52,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:20:52,684 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:20:52,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:20:52,684 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:20:52,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:20:52,685 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:20:52,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:20:52,685 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:20:52,686 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:20:52,686 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:20:52,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:20:52,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:20:52,686 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:20:52,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:20:52,687 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:20:52,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:20:52,688 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:20:52,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:20:52,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:20:52,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:20:52,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:52,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:20:52,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:20:52,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:20:52,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:20:52,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:20:52,940 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:20:52,941 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:20:52,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2023-04-01 12:20:54,075 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:20:54,289 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:20:54,289 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2023-04-01 12:20:54,305 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b38443838/8ee1b14a79504b5fb3b2d0f61fef3484/FLAG92acf58dc [2023-04-01 12:20:54,316 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b38443838/8ee1b14a79504b5fb3b2d0f61fef3484 [2023-04-01 12:20:54,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:20:54,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:20:54,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:54,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:20:54,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:20:54,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4189bb74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54, skipping insertion in model container [2023-04-01 12:20:54,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:20:54,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:20:54,691 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2023-04-01 12:20:54,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:54,713 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:20:54,815 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c[24198,24211] [2023-04-01 12:20:54,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:20:54,834 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:20:54,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54 WrapperNode [2023-04-01 12:20:54,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:20:54,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:20:54,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:20:54,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:20:54,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,933 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:20:54,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:20:54,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:20:54,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:20:54,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (1/1) ... [2023-04-01 12:20:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:20:54,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:20:54,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:20:54,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:20:55,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:20:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:20:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:20:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:20:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:20:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:20:55,007 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:20:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 12:20:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:20:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:20:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:20:55,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:20:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:20:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:20:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:20:55,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:20:55,009 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:20:55,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:20:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:20:55,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:20:55,132 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:20:55,134 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:20:55,884 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:20:56,421 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:20:56,422 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:20:56,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:56 BoogieIcfgContainer [2023-04-01 12:20:56,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:20:56,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:20:56,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:20:56,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:20:56,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:20:54" (1/3) ... [2023-04-01 12:20:56,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4eeeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:56, skipping insertion in model container [2023-04-01 12:20:56,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:20:54" (2/3) ... [2023-04-01 12:20:56,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4eeeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:20:56, skipping insertion in model container [2023-04-01 12:20:56,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:20:56" (3/3) ... [2023-04-01 12:20:56,435 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c [2023-04-01 12:20:56,452 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:20:56,452 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:20:56,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:20:56,518 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;@72ef8260, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:20:56,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:20:56,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:20:56,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 12:20:56,539 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:20:56,541 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] [2023-04-01 12:20:56,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:20:56,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:20:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1371271177, now seen corresponding path program 1 times [2023-04-01 12:20:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:20:56,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165084422] [2023-04-01 12:20:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:20:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:20:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:01,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165084422] [2023-04-01 12:21:01,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165084422] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:01,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:01,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:21:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982423757] [2023-04-01 12:21:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:01,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:21:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:21:01,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:21:01,721 INFO L87 Difference]: Start difference. First operand has 175 states, 153 states have (on average 1.5620915032679739) internal successors, (239), 154 states have internal predecessors, (239), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:04,101 INFO L93 Difference]: Finished difference Result 282 states and 398 transitions. [2023-04-01 12:21:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 12:21:04,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 85 [2023-04-01 12:21:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:04,113 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:21:04,113 INFO L226 Difference]: Without dead ends: 228 [2023-04-01 12:21:04,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 12:21:04,119 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1937 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:04,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1940 Valid, 165 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 12:21:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-01 12:21:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2023-04-01 12:21:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5465116279069768) internal successors, (266), 173 states have internal predecessors, (266), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-01 12:21:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2023-04-01 12:21:04,212 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 85 [2023-04-01 12:21:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:04,214 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2023-04-01 12:21:04,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 6.7) internal successors, (67), 12 states have internal predecessors, (67), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2023-04-01 12:21:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 12:21:04,223 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:04,223 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] [2023-04-01 12:21:04,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:21:04,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:04,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 829938702, now seen corresponding path program 1 times [2023-04-01 12:21:04,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:04,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985645265] [2023-04-01 12:21:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:06,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:06,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985645265] [2023-04-01 12:21:06,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985645265] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:06,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:06,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:06,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422580438] [2023-04-01 12:21:06,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:06,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:06,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:06,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:06,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:06,228 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:07,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:07,389 INFO L93 Difference]: Finished difference Result 281 states and 396 transitions. [2023-04-01 12:21:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2023-04-01 12:21:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:07,392 INFO L225 Difference]: With dead ends: 281 [2023-04-01 12:21:07,392 INFO L226 Difference]: Without dead ends: 235 [2023-04-01 12:21:07,393 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 [2023-04-01 12:21:07,394 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 311 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:07,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 106 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1795 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-04-01 12:21:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 202. [2023-04-01 12:21:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5406976744186047) internal successors, (265), 173 states have internal predecessors, (265), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 294 transitions. [2023-04-01 12:21:07,435 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 294 transitions. Word has length 86 [2023-04-01 12:21:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:07,437 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 294 transitions. [2023-04-01 12:21:07,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.714285714285714) internal successors, (68), 9 states have internal predecessors, (68), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 294 transitions. [2023-04-01 12:21:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:21:07,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:07,440 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] [2023-04-01 12:21:07,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:21:07,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:07,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1454679616, now seen corresponding path program 1 times [2023-04-01 12:21:07,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:07,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96319542] [2023-04-01 12:21:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:07,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:09,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:09,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96319542] [2023-04-01 12:21:09,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96319542] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:09,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:09,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:09,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744495661] [2023-04-01 12:21:09,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:09,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:09,370 INFO L87 Difference]: Start difference. First operand 202 states and 294 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:10,491 INFO L93 Difference]: Finished difference Result 275 states and 380 transitions. [2023-04-01 12:21:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:10,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2023-04-01 12:21:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:10,493 INFO L225 Difference]: With dead ends: 275 [2023-04-01 12:21:10,494 INFO L226 Difference]: Without dead ends: 234 [2023-04-01 12:21:10,494 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 [2023-04-01 12:21:10,495 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 575 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:10,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 100 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-01 12:21:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2023-04-01 12:21:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 173 states have internal predecessors, (264), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 293 transitions. [2023-04-01 12:21:10,532 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 293 transitions. Word has length 87 [2023-04-01 12:21:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:10,534 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 293 transitions. [2023-04-01 12:21:10,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 293 transitions. [2023-04-01 12:21:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 12:21:10,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:10,538 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] [2023-04-01 12:21:10,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:21:10,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:10,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash 453522871, now seen corresponding path program 1 times [2023-04-01 12:21:10,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:10,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95100423] [2023-04-01 12:21:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:12,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95100423] [2023-04-01 12:21:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95100423] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:12,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:12,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:12,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130966687] [2023-04-01 12:21:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:12,464 INFO L87 Difference]: Start difference. First operand 202 states and 293 transitions. Second operand has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:13,596 INFO L93 Difference]: Finished difference Result 281 states and 385 transitions. [2023-04-01 12:21:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2023-04-01 12:21:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:13,598 INFO L225 Difference]: With dead ends: 281 [2023-04-01 12:21:13,598 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 12:21:13,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:21:13,600 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 577 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:13,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 102 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 12:21:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2023-04-01 12:21:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5290697674418605) internal successors, (263), 173 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 292 transitions. [2023-04-01 12:21:13,626 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 292 transitions. Word has length 88 [2023-04-01 12:21:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:13,626 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 292 transitions. [2023-04-01 12:21:13,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.0) internal successors, (70), 9 states have internal predecessors, (70), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 292 transitions. [2023-04-01 12:21:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 12:21:13,627 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:13,628 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] [2023-04-01 12:21:13,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:21:13,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:13,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash 589146249, now seen corresponding path program 1 times [2023-04-01 12:21:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:13,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370950213] [2023-04-01 12:21:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:13,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:15,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:15,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370950213] [2023-04-01 12:21:15,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370950213] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:15,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:15,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:15,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777032702] [2023-04-01 12:21:15,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:15,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:15,343 INFO L87 Difference]: Start difference. First operand 202 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:16,520 INFO L93 Difference]: Finished difference Result 287 states and 390 transitions. [2023-04-01 12:21:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:16,521 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 89 [2023-04-01 12:21:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:16,522 INFO L225 Difference]: With dead ends: 287 [2023-04-01 12:21:16,522 INFO L226 Difference]: Without dead ends: 246 [2023-04-01 12:21:16,523 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 [2023-04-01 12:21:16,524 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 581 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:16,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 104 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 12:21:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-01 12:21:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2023-04-01 12:21:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 172 states have (on average 1.5232558139534884) internal successors, (262), 173 states have internal predecessors, (262), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2023-04-01 12:21:16,551 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 89 [2023-04-01 12:21:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:16,551 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2023-04-01 12:21:16,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.142857142857142) internal successors, (71), 9 states have internal predecessors, (71), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2023-04-01 12:21:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-01 12:21:16,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:16,552 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] [2023-04-01 12:21:16,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:21:16,553 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:16,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1463843697, now seen corresponding path program 1 times [2023-04-01 12:21:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:16,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367706093] [2023-04-01 12:21:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:19,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:19,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367706093] [2023-04-01 12:21:19,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367706093] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:19,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:19,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:21:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234661988] [2023-04-01 12:21:19,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:19,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:21:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:21:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:21:19,930 INFO L87 Difference]: Start difference. First operand 202 states and 291 transitions. Second operand has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:21,790 INFO L93 Difference]: Finished difference Result 282 states and 393 transitions. [2023-04-01 12:21:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:21:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 91 [2023-04-01 12:21:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:21,793 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:21:21,793 INFO L226 Difference]: Without dead ends: 238 [2023-04-01 12:21:21,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 12:21:21,795 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1612 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:21,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 145 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:21:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-04-01 12:21:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 204. [2023-04-01 12:21:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.5114942528735633) internal successors, (263), 175 states have internal predecessors, (263), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 292 transitions. [2023-04-01 12:21:21,826 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 292 transitions. Word has length 91 [2023-04-01 12:21:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:21,826 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 292 transitions. [2023-04-01 12:21:21,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.3) internal successors, (73), 12 states have internal predecessors, (73), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:21,827 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 292 transitions. [2023-04-01 12:21:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 12:21:21,827 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:21,827 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] [2023-04-01 12:21:21,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:21:21,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:21,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1748640686, now seen corresponding path program 1 times [2023-04-01 12:21:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:21,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813567822] [2023-04-01 12:21:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:22,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:22,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813567822] [2023-04-01 12:21:22,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813567822] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:22,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:22,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:21:22,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399344433] [2023-04-01 12:21:22,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:22,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:21:22,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:21:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:21:22,815 INFO L87 Difference]: Start difference. First operand 204 states and 292 transitions. Second operand has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:23,818 INFO L93 Difference]: Finished difference Result 279 states and 386 transitions. [2023-04-01 12:21:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:21:23,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2023-04-01 12:21:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:23,820 INFO L225 Difference]: With dead ends: 279 [2023-04-01 12:21:23,820 INFO L226 Difference]: Without dead ends: 231 [2023-04-01 12:21:23,820 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 [2023-04-01 12:21:23,822 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 297 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:23,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 105 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 12:21:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-01 12:21:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 204. [2023-04-01 12:21:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 175 states have internal predecessors, (259), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 288 transitions. [2023-04-01 12:21:23,854 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 288 transitions. Word has length 92 [2023-04-01 12:21:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:23,855 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 288 transitions. [2023-04-01 12:21:23,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.571428571428571) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-04-01 12:21:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 288 transitions. [2023-04-01 12:21:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 12:21:23,856 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:23,856 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] [2023-04-01 12:21:23,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:21:23,856 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:23,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2082172780, now seen corresponding path program 1 times [2023-04-01 12:21:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:23,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996461138] [2023-04-01 12:21:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:23,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:26,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:26,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996461138] [2023-04-01 12:21:26,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996461138] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:26,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:26,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-01 12:21:26,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60863526] [2023-04-01 12:21:26,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:26,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 12:21:26,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 12:21:26,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:21:26,654 INFO L87 Difference]: Start difference. First operand 204 states and 288 transitions. Second operand has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:28,541 INFO L93 Difference]: Finished difference Result 277 states and 374 transitions. [2023-04-01 12:21:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:21:28,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2023-04-01 12:21:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:28,543 INFO L225 Difference]: With dead ends: 277 [2023-04-01 12:21:28,543 INFO L226 Difference]: Without dead ends: 233 [2023-04-01 12:21:28,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 12:21:28,545 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1781 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:28,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1784 Valid, 153 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 12:21:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-04-01 12:21:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 204. [2023-04-01 12:21:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 175 states have internal predecessors, (258), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 12:21:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 287 transitions. [2023-04-01 12:21:28,579 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 287 transitions. Word has length 94 [2023-04-01 12:21:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:28,579 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 287 transitions. [2023-04-01 12:21:28,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 7.6) internal successors, (76), 12 states have internal predecessors, (76), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 12:21:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 287 transitions. [2023-04-01 12:21:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-01 12:21:28,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:28,580 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] [2023-04-01 12:21:28,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:21:28,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:28,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1711277683, now seen corresponding path program 1 times [2023-04-01 12:21:28,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:28,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389214443] [2023-04-01 12:21:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:21:29,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:29,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389214443] [2023-04-01 12:21:29,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389214443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:21:29,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:21:29,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 12:21:29,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919443588] [2023-04-01 12:21:29,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:21:29,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 12:21:29,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:21:29,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 12:21:29,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:21:29,728 INFO L87 Difference]: Start difference. First operand 204 states and 287 transitions. Second operand has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 12:21:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:21:30,173 INFO L93 Difference]: Finished difference Result 282 states and 388 transitions. [2023-04-01 12:21:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 12:21:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-04-01 12:21:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:21:30,175 INFO L225 Difference]: With dead ends: 282 [2023-04-01 12:21:30,175 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 12:21:30,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-01 12:21:30,179 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 40 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:21:30,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2696 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:21:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 12:21:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 212. [2023-04-01 12:21:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 179 states have (on average 1.458100558659218) internal successors, (261), 181 states have internal predecessors, (261), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 12:21:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 293 transitions. [2023-04-01 12:21:30,218 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 293 transitions. Word has length 95 [2023-04-01 12:21:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:21:30,219 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 293 transitions. [2023-04-01 12:21:30,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 9.625) internal successors, (77), 10 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 12:21:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 293 transitions. [2023-04-01 12:21:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 12:21:30,220 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:21:30,220 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:21:30,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:21:30,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:21:30,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:21:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1517681741, now seen corresponding path program 1 times [2023-04-01 12:21:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:21:30,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570055446] [2023-04-01 12:21:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:30,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:21:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 12:21:35,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:21:35,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570055446] [2023-04-01 12:21:35,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570055446] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:21:35,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847051096] [2023-04-01 12:21:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:21:35,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:21:35,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:21:35,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:21:35,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:21:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:21:35,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-01 12:21:35,963 INFO L285 TraceCheckSpWp]: Computing forward predicates...