/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:38:50,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:38:50,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:38:50,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:38:50,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:38:50,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:38:50,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:38:50,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:38:50,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:38:50,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:38:50,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:38:50,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:38:50,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:38:50,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:38:50,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:38:50,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:38:50,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:38:50,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:38:50,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:38:50,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:38:50,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:38:50,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:38:50,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:38:50,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:38:50,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:38:50,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:38:50,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:38:50,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:38:50,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:38:50,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:38:50,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:38:50,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:38:50,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:38:50,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:38:50,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:38:50,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:38:50,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:38:50,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:38:50,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:38:50,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:38:50,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:38:50,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 01:38:50,727 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:38:50,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:38:50,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:38:50,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:38:50,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:38:50,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:38:50,728 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:38:50,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:38:50,729 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:38:50,729 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:38:50,729 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:38:50,730 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:38:50,730 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:38:50,730 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:38:50,730 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:38:50,730 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:38:50,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:38:50,730 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:38:50,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:38:50,731 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:38:50,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:38:50,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:38:50,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:38:50,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:38:50,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:38:50,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:38:50,733 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:38:50,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:38:50,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:38:50,734 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:38:50,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:38:50,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:38:50,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:38:50,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:38:50,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:38:50,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:38:50,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:38:50,999 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:38:51,000 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:38:51,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2023-04-03 01:38:52,131 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:38:52,360 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:38:52,361 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2023-04-03 01:38:52,370 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f01738e/1e1fe83839b24d7d8c063799b0b12849/FLAGd5a1c2b31 [2023-04-03 01:38:52,383 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94f01738e/1e1fe83839b24d7d8c063799b0b12849 [2023-04-03 01:38:52,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:38:52,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:38:52,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:38:52,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:38:52,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:38:52,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d64344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52, skipping insertion in model container [2023-04-03 01:38:52,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:38:52,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:38:52,666 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c[28366,28379] [2023-04-03 01:38:52,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:38:52,680 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:38:52,771 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.ufo.UNBOUNDED.pals.c[28366,28379] [2023-04-03 01:38:52,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:38:52,786 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:38:52,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52 WrapperNode [2023-04-03 01:38:52,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:38:52,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:38:52,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:38:52,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:38:52,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:38:52,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:38:52,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:38:52,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:38:52,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (1/1) ... [2023-04-03 01:38:52,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:38:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:38:52,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 01:38:52,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 01:38:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:38:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:38:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:38:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:38:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:38:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:38:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:38:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:38:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:38:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:38:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:38:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:38:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:38:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:38:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:38:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 01:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:38:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:38:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:38:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:38:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:38:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:38:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:38:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:38:53,186 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:38:53,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:38:54,132 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:38:54,867 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:38:54,868 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:38:54,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:38:54 BoogieIcfgContainer [2023-04-03 01:38:54,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:38:54,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:38:54,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:38:54,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:38:54,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:38:52" (1/3) ... [2023-04-03 01:38:54,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73175c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:38:54, skipping insertion in model container [2023-04-03 01:38:54,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:38:52" (2/3) ... [2023-04-03 01:38:54,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73175c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:38:54, skipping insertion in model container [2023-04-03 01:38:54,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:38:54" (3/3) ... [2023-04-03 01:38:54,881 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c [2023-04-03 01:38:54,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:38:54,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:38:54,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:38:54,958 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;@780f9ffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:38:54,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:38:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 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) [2023-04-03 01:38:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-03 01:38:54,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:38:54,978 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] [2023-04-03 01:38:54,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:38:54,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:38:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1613895835, now seen corresponding path program 1 times [2023-04-03 01:38:54,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:38:54,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122403417] [2023-04-03 01:38:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:38:54,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:38:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:01,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122403417] [2023-04-03 01:39:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122403417] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-04-03 01:39:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954939568] [2023-04-03 01:39:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-03 01:39:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-03 01:39:01,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-04-03 01:39:01,611 INFO L87 Difference]: Start difference. First operand has 174 states, 152 states have (on average 1.5657894736842106) internal successors, (238), 154 states have internal predecessors, (238), 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) [2023-04-03 01:39:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:03,938 INFO L93 Difference]: Finished difference Result 266 states and 386 transitions. [2023-04-03 01:39:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-03 01:39:03,940 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 [2023-04-03 01:39:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:03,950 INFO L225 Difference]: With dead ends: 266 [2023-04-03 01:39:03,950 INFO L226 Difference]: Without dead ends: 225 [2023-04-03 01:39:03,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2023-04-03 01:39:03,958 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1380 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:03,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 138 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-03 01:39:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-04-03 01:39:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-04-03 01:39:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5497076023391814) internal successors, (265), 172 states have internal predecessors, (265), 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) [2023-04-03 01:39:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2023-04-03 01:39:04,075 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 85 [2023-04-03 01:39:04,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:04,076 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2023-04-03 01:39:04,076 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) [2023-04-03 01:39:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2023-04-03 01:39:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-03 01:39:04,085 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:04,085 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] [2023-04-03 01:39:04,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:39:04,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:04,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1092511881, now seen corresponding path program 1 times [2023-04-03 01:39:04,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:04,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150803933] [2023-04-03 01:39:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:04,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:06,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:06,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150803933] [2023-04-03 01:39:06,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150803933] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:06,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:06,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:06,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164027968] [2023-04-03 01:39:06,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:06,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:06,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:06,755 INFO L87 Difference]: Start difference. First operand 201 states and 295 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) [2023-04-03 01:39:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:07,890 INFO L93 Difference]: Finished difference Result 277 states and 392 transitions. [2023-04-03 01:39:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:07,891 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 [2023-04-03 01:39:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:07,893 INFO L225 Difference]: With dead ends: 277 [2023-04-03 01:39:07,893 INFO L226 Difference]: Without dead ends: 232 [2023-04-03 01:39:07,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:07,895 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 567 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:07,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 87 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:39:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-03 01:39:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2023-04-03 01:39:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.543859649122807) internal successors, (264), 172 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) [2023-04-03 01:39:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 293 transitions. [2023-04-03 01:39:07,930 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 293 transitions. Word has length 86 [2023-04-03 01:39:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:07,932 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 293 transitions. [2023-04-03 01:39:07,932 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) [2023-04-03 01:39:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 293 transitions. [2023-04-03 01:39:07,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-03 01:39:07,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:07,935 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] [2023-04-03 01:39:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:39:07,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:07,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 198516558, now seen corresponding path program 1 times [2023-04-03 01:39:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:07,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057104009] [2023-04-03 01:39:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:07,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:10,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:10,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057104009] [2023-04-03 01:39:10,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057104009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:10,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:10,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:10,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8731488] [2023-04-03 01:39:10,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:10,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:10,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:10,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:10,246 INFO L87 Difference]: Start difference. First operand 201 states and 293 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) [2023-04-03 01:39:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:11,517 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2023-04-03 01:39:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:11,518 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 [2023-04-03 01:39:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:11,520 INFO L225 Difference]: With dead ends: 271 [2023-04-03 01:39:11,520 INFO L226 Difference]: Without dead ends: 231 [2023-04-03 01:39:11,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:11,522 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:11,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 96 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 01:39:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-03 01:39:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2023-04-03 01:39:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 172 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) [2023-04-03 01:39:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2023-04-03 01:39:11,546 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 87 [2023-04-03 01:39:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:11,548 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2023-04-03 01:39:11,548 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) [2023-04-03 01:39:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2023-04-03 01:39:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-03 01:39:11,551 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:11,551 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] [2023-04-03 01:39:11,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:39:11,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:11,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash -638823278, now seen corresponding path program 1 times [2023-04-03 01:39:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:11,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786121448] [2023-04-03 01:39:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:13,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:13,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786121448] [2023-04-03 01:39:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786121448] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:13,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:13,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:13,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721027925] [2023-04-03 01:39:13,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:13,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:13,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:13,754 INFO L87 Difference]: Start difference. First operand 201 states and 292 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) [2023-04-03 01:39:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:14,859 INFO L93 Difference]: Finished difference Result 277 states and 381 transitions. [2023-04-03 01:39:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:14,860 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 [2023-04-03 01:39:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:14,861 INFO L225 Difference]: With dead ends: 277 [2023-04-03 01:39:14,861 INFO L226 Difference]: Without dead ends: 237 [2023-04-03 01:39:14,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:14,868 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 317 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:14,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 97 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:39:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-04-03 01:39:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2023-04-03 01:39:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5321637426900585) internal successors, (262), 172 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) [2023-04-03 01:39:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 291 transitions. [2023-04-03 01:39:14,901 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 291 transitions. Word has length 88 [2023-04-03 01:39:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:14,901 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 291 transitions. [2023-04-03 01:39:14,902 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) [2023-04-03 01:39:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 291 transitions. [2023-04-03 01:39:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-03 01:39:14,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:14,907 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] [2023-04-03 01:39:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:39:14,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:14,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 280156983, now seen corresponding path program 1 times [2023-04-03 01:39:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:14,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271308248] [2023-04-03 01:39:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:14,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:16,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:16,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271308248] [2023-04-03 01:39:16,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271308248] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:16,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:16,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860205113] [2023-04-03 01:39:16,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:16,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:16,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:16,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:16,933 INFO L87 Difference]: Start difference. First operand 201 states and 291 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) [2023-04-03 01:39:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:18,152 INFO L93 Difference]: Finished difference Result 283 states and 386 transitions. [2023-04-03 01:39:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:18,152 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 [2023-04-03 01:39:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:18,154 INFO L225 Difference]: With dead ends: 283 [2023-04-03 01:39:18,154 INFO L226 Difference]: Without dead ends: 243 [2023-04-03 01:39:18,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:18,155 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 576 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:18,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 100 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-03 01:39:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-03 01:39:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 201. [2023-04-03 01:39:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.5263157894736843) internal successors, (261), 172 states have internal predecessors, (261), 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) [2023-04-03 01:39:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 290 transitions. [2023-04-03 01:39:18,180 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 290 transitions. Word has length 89 [2023-04-03 01:39:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:18,180 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 290 transitions. [2023-04-03 01:39:18,181 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) [2023-04-03 01:39:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 290 transitions. [2023-04-03 01:39:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-03 01:39:18,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:18,182 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] [2023-04-03 01:39:18,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 01:39:18,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:18,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash 855801791, now seen corresponding path program 1 times [2023-04-03 01:39:18,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:18,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429581874] [2023-04-03 01:39:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:18,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:21,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:21,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429581874] [2023-04-03 01:39:21,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429581874] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:21,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:21,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 01:39:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7630876] [2023-04-03 01:39:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 01:39:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 01:39:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-03 01:39:21,787 INFO L87 Difference]: Start difference. First operand 201 states and 290 transitions. Second operand has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 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) [2023-04-03 01:39:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:23,947 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2023-04-03 01:39:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-03 01:39:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 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 [2023-04-03 01:39:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:23,949 INFO L225 Difference]: With dead ends: 295 [2023-04-03 01:39:23,949 INFO L226 Difference]: Without dead ends: 251 [2023-04-03 01:39:23,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 01:39:23,951 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1790 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1793 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:23,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1793 Valid, 155 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-03 01:39:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-04-03 01:39:23,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 205. [2023-04-03 01:39:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 175 states have (on average 1.5085714285714287) internal successors, (264), 176 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) [2023-04-03 01:39:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 293 transitions. [2023-04-03 01:39:23,983 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 293 transitions. Word has length 91 [2023-04-03 01:39:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:23,983 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 293 transitions. [2023-04-03 01:39:23,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 6.636363636363637) internal successors, (73), 13 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) [2023-04-03 01:39:23,983 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 293 transitions. [2023-04-03 01:39:23,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-03 01:39:23,984 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:23,984 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] [2023-04-03 01:39:23,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 01:39:23,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:23,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -726786231, now seen corresponding path program 1 times [2023-04-03 01:39:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365463137] [2023-04-03 01:39:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:23,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:25,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:25,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365463137] [2023-04-03 01:39:25,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365463137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:25,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:25,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:39:25,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78011560] [2023-04-03 01:39:25,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:25,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:39:25,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:39:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:39:25,274 INFO L87 Difference]: Start difference. First operand 205 states and 293 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) [2023-04-03 01:39:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:26,383 INFO L93 Difference]: Finished difference Result 296 states and 406 transitions. [2023-04-03 01:39:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:39:26,385 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 [2023-04-03 01:39:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:26,386 INFO L225 Difference]: With dead ends: 296 [2023-04-03 01:39:26,386 INFO L226 Difference]: Without dead ends: 248 [2023-04-03 01:39:26,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:39:26,390 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 555 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:26,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 101 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-03 01:39:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-03 01:39:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2023-04-03 01:39:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 191 states have (on average 1.4659685863874345) internal successors, (280), 192 states have internal predecessors, (280), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-03 01:39:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2023-04-03 01:39:26,431 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 92 [2023-04-03 01:39:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:26,431 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2023-04-03 01:39:26,431 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) [2023-04-03 01:39:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2023-04-03 01:39:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-03 01:39:26,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:26,433 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] [2023-04-03 01:39:26,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 01:39:26,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:26,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1577658737, now seen corresponding path program 1 times [2023-04-03 01:39:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:26,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654202918] [2023-04-03 01:39:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:26,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:30,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:30,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654202918] [2023-04-03 01:39:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654202918] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:30,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-04-03 01:39:30,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392322812] [2023-04-03 01:39:30,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:30,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-03 01:39:30,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-03 01:39:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-04-03 01:39:30,957 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-03 01:39:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:35,738 INFO L93 Difference]: Finished difference Result 866 states and 1210 transitions. [2023-04-03 01:39:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-04-03 01:39:35,739 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 94 [2023-04-03 01:39:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:35,742 INFO L225 Difference]: With dead ends: 866 [2023-04-03 01:39:35,742 INFO L226 Difference]: Without dead ends: 668 [2023-04-03 01:39:35,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=847, Invalid=3983, Unknown=0, NotChecked=0, Total=4830 [2023-04-03 01:39:35,745 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6427 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6440 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:35,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6440 Valid, 204 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-03 01:39:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2023-04-03 01:39:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 477. [2023-04-03 01:39:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 422 states have (on average 1.4881516587677726) internal successors, (628), 424 states have internal predecessors, (628), 27 states have call successors, (27), 27 states have call predecessors, (27), 27 states have return successors, (28), 25 states have call predecessors, (28), 26 states have call successors, (28) [2023-04-03 01:39:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 683 transitions. [2023-04-03 01:39:35,825 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 683 transitions. Word has length 94 [2023-04-03 01:39:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:35,826 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 683 transitions. [2023-04-03 01:39:35,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-03 01:39:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 683 transitions. [2023-04-03 01:39:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-04-03 01:39:35,827 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:35,827 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, 1, 1, 1] [2023-04-03 01:39:35,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 01:39:35,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:35,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1192173294, now seen corresponding path program 1 times [2023-04-03 01:39:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:35,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175154351] [2023-04-03 01:39:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:35,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:37,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:37,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175154351] [2023-04-03 01:39:37,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175154351] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:37,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:37,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:39:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609256468] [2023-04-03 01:39:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:37,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:39:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:39:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:39:37,295 INFO L87 Difference]: Start difference. First operand 477 states and 683 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) [2023-04-03 01:39:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:37,803 INFO L93 Difference]: Finished difference Result 513 states and 728 transitions. [2023-04-03 01:39:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 01:39:37,805 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 [2023-04-03 01:39:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:37,807 INFO L225 Difference]: With dead ends: 513 [2023-04-03 01:39:37,807 INFO L226 Difference]: Without dead ends: 511 [2023-04-03 01:39:37,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:39:37,808 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 35 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:37,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2667 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 01:39:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2023-04-03 01:39:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 487. [2023-04-03 01:39:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 428 states have (on average 1.4813084112149533) internal successors, (634), 432 states have internal predecessors, (634), 28 states have call successors, (28), 28 states have call predecessors, (28), 30 states have return successors, (31), 26 states have call predecessors, (31), 27 states have call successors, (31) [2023-04-03 01:39:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 693 transitions. [2023-04-03 01:39:37,890 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 693 transitions. Word has length 95 [2023-04-03 01:39:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:37,890 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 693 transitions. [2023-04-03 01:39:37,891 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) [2023-04-03 01:39:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 693 transitions. [2023-04-03 01:39:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:39:37,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:37,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:39:37,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 01:39:37,892 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:37,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:37,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1069738731, now seen corresponding path program 1 times [2023-04-03 01:39:37,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:37,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104179496] [2023-04-03 01:39:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:37,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:37,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104179496] [2023-04-03 01:39:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104179496] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:37,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:37,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:39:37,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583545933] [2023-04-03 01:39:37,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:37,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:39:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:39:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:39:37,972 INFO L87 Difference]: Start difference. First operand 487 states and 693 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 01:39:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:38,144 INFO L93 Difference]: Finished difference Result 1160 states and 1678 transitions. [2023-04-03 01:39:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:39:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2023-04-03 01:39:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:38,148 INFO L225 Difference]: With dead ends: 1160 [2023-04-03 01:39:38,148 INFO L226 Difference]: Without dead ends: 751 [2023-04-03 01:39:38,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:39:38,150 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 131 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:38,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 429 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:39:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-04-03 01:39:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 508. [2023-04-03 01:39:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 449 states have (on average 1.4721603563474388) internal successors, (661), 453 states have internal predecessors, (661), 28 states have call successors, (28), 28 states have call predecessors, (28), 30 states have return successors, (31), 26 states have call predecessors, (31), 27 states have call successors, (31) [2023-04-03 01:39:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 720 transitions. [2023-04-03 01:39:38,229 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 720 transitions. Word has length 96 [2023-04-03 01:39:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:38,229 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 720 transitions. [2023-04-03 01:39:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 01:39:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 720 transitions. [2023-04-03 01:39:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:39:38,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:38,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:39:38,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-03 01:39:38,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:38,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash 95779284, now seen corresponding path program 1 times [2023-04-03 01:39:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:38,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437417396] [2023-04-03 01:39:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:38,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:43,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:43,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437417396] [2023-04-03 01:39:43,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437417396] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:43,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:43,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-03 01:39:43,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448406180] [2023-04-03 01:39:43,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:43,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-03 01:39:43,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-03 01:39:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2023-04-03 01:39:43,759 INFO L87 Difference]: Start difference. First operand 508 states and 720 transitions. Second operand has 28 states, 18 states have (on average 4.333333333333333) internal successors, (78), 19 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-03 01:39:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:39:50,830 INFO L93 Difference]: Finished difference Result 1906 states and 2740 transitions. [2023-04-03 01:39:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-03 01:39:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 18 states have (on average 4.333333333333333) internal successors, (78), 19 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 96 [2023-04-03 01:39:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:39:50,839 INFO L225 Difference]: With dead ends: 1906 [2023-04-03 01:39:50,839 INFO L226 Difference]: Without dead ends: 1413 [2023-04-03 01:39:50,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1162, Invalid=6320, Unknown=0, NotChecked=0, Total=7482 [2023-04-03 01:39:50,842 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4622 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 5249 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4633 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 5481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 5249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:39:50,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4633 Valid, 367 Invalid, 5481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 5249 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-03 01:39:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2023-04-03 01:39:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 876. [2023-04-03 01:39:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 816 states have (on average 1.4926470588235294) internal successors, (1218), 821 states have internal predecessors, (1218), 28 states have call successors, (28), 28 states have call predecessors, (28), 31 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2023-04-03 01:39:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1278 transitions. [2023-04-03 01:39:51,012 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1278 transitions. Word has length 96 [2023-04-03 01:39:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:39:51,012 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 1278 transitions. [2023-04-03 01:39:51,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 18 states have (on average 4.333333333333333) internal successors, (78), 19 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-03 01:39:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1278 transitions. [2023-04-03 01:39:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:39:51,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:39:51,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:39:51,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-03 01:39:51,015 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:39:51,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:39:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -392317676, now seen corresponding path program 1 times [2023-04-03 01:39:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:39:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822709320] [2023-04-03 01:39:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:39:51,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:39:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:39:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:39:55,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:39:55,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822709320] [2023-04-03 01:39:55,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822709320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:39:55,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:39:55,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2023-04-03 01:39:55,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995272945] [2023-04-03 01:39:55,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:39:55,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-03 01:39:55,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:39:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-03 01:39:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-04-03 01:39:55,166 INFO L87 Difference]: Start difference. First operand 876 states and 1278 transitions. Second operand has 27 states, 17 states have (on average 4.588235294117647) internal successors, (78), 18 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-03 01:40:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:40:00,761 INFO L93 Difference]: Finished difference Result 2301 states and 3320 transitions. [2023-04-03 01:40:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-04-03 01:40:00,772 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 17 states have (on average 4.588235294117647) internal successors, (78), 18 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 96 [2023-04-03 01:40:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:40:00,778 INFO L225 Difference]: With dead ends: 2301 [2023-04-03 01:40:00,778 INFO L226 Difference]: Without dead ends: 1855 [2023-04-03 01:40:00,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1041, Invalid=5439, Unknown=0, NotChecked=0, Total=6480 [2023-04-03 01:40:00,781 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2658 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 4971 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2668 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 4971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:40:00,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2668 Valid, 306 Invalid, 5164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 4971 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-03 01:40:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2023-04-03 01:40:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1143. [2023-04-03 01:40:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1083 states have (on average 1.5032317636195753) internal successors, (1628), 1088 states have internal predecessors, (1628), 28 states have call successors, (28), 28 states have call predecessors, (28), 31 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2023-04-03 01:40:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1688 transitions. [2023-04-03 01:40:00,979 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1688 transitions. Word has length 96 [2023-04-03 01:40:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:40:00,979 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 1688 transitions. [2023-04-03 01:40:00,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 17 states have (on average 4.588235294117647) internal successors, (78), 18 states have internal predecessors, (78), 9 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-03 01:40:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1688 transitions. [2023-04-03 01:40:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:40:00,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:40:00,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:40:00,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-03 01:40:00,982 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:40:00,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:40:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1625788380, now seen corresponding path program 1 times [2023-04-03 01:40:00,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:40:00,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330889735] [2023-04-03 01:40:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:40:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:40:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:40:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:40:01,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:40:01,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330889735] [2023-04-03 01:40:01,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330889735] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:40:01,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:40:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 01:40:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986817053] [2023-04-03 01:40:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:40:01,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 01:40:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:40:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 01:40:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:40:01,056 INFO L87 Difference]: Start difference. First operand 1143 states and 1688 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 01:40:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:40:01,341 INFO L93 Difference]: Finished difference Result 3030 states and 4518 transitions. [2023-04-03 01:40:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 01:40:01,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2023-04-03 01:40:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:40:01,347 INFO L225 Difference]: With dead ends: 3030 [2023-04-03 01:40:01,348 INFO L226 Difference]: Without dead ends: 1961 [2023-04-03 01:40:01,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 01:40:01,350 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 155 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 01:40:01,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 429 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 01:40:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-04-03 01:40:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1177. [2023-04-03 01:40:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1117 states have (on average 1.495971351835273) internal successors, (1671), 1122 states have internal predecessors, (1671), 28 states have call successors, (28), 28 states have call predecessors, (28), 31 states have return successors, (32), 26 states have call predecessors, (32), 27 states have call successors, (32) [2023-04-03 01:40:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1731 transitions. [2023-04-03 01:40:01,587 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1731 transitions. Word has length 96 [2023-04-03 01:40:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:40:01,587 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1731 transitions. [2023-04-03 01:40:01,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-03 01:40:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1731 transitions. [2023-04-03 01:40:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-03 01:40:01,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:40:01,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:40:01,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 01:40:01,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:40:01,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:40:01,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1186758740, now seen corresponding path program 1 times [2023-04-03 01:40:01,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:40:01,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870781700] [2023-04-03 01:40:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:40:01,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:40:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:40:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:40:04,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:40:04,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870781700] [2023-04-03 01:40:04,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870781700] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:40:04,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:40:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-04-03 01:40:04,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061265023] [2023-04-03 01:40:04,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:40:04,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-03 01:40:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:40:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-03 01:40:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2023-04-03 01:40:04,145 INFO L87 Difference]: Start difference. First operand 1177 states and 1731 transitions. Second operand has 21 states, 11 states have (on average 7.090909090909091) internal successors, (78), 13 states have internal predecessors, (78), 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) [2023-04-03 01:40:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:40:06,252 INFO L93 Difference]: Finished difference Result 1304 states and 1878 transitions. [2023-04-03 01:40:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-03 01:40:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 11 states have (on average 7.090909090909091) internal successors, (78), 13 states have internal predecessors, (78), 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 96 [2023-04-03 01:40:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:40:06,256 INFO L225 Difference]: With dead ends: 1304 [2023-04-03 01:40:06,256 INFO L226 Difference]: Without dead ends: 1221 [2023-04-03 01:40:06,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-04-03 01:40:06,258 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1800 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2655 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1804 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-03 01:40:06,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1804 Valid, 149 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2655 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-03 01:40:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2023-04-03 01:40:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 877. [2023-04-03 01:40:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 831 states have (on average 1.4945848375451263) internal successors, (1242), 834 states have internal predecessors, (1242), 22 states have call successors, (22), 22 states have call predecessors, (22), 23 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2023-04-03 01:40:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1288 transitions. [2023-04-03 01:40:06,450 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1288 transitions. Word has length 96 [2023-04-03 01:40:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:40:06,450 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1288 transitions. [2023-04-03 01:40:06,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 11 states have (on average 7.090909090909091) internal successors, (78), 13 states have internal predecessors, (78), 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) [2023-04-03 01:40:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1288 transitions. [2023-04-03 01:40:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-03 01:40:06,454 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:40:06,454 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] [2023-04-03 01:40:06,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-03 01:40:06,455 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:40:06,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:40:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash -986145650, now seen corresponding path program 1 times [2023-04-03 01:40:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:40:06,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248605298] [2023-04-03 01:40:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:40:06,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:40:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:40:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:40:46,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:40:46,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248605298] [2023-04-03 01:40:46,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248605298] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:40:46,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345430854] [2023-04-03 01:40:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:40:46,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:40:46,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:40:46,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 01:40:46,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:40:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:40:46,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 93 conjunts are in the unsatisfiable core [2023-04-03 01:40:46,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:41:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:41:08,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:41:08,821 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 5749 disjunctions. This might take some time... [2023-04-03 01:41:10,493 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 5749 disjunctions.