/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:01:20,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:01:20,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:01:20,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:01:20,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:01:20,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:01:20,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:01:20,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:01:20,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:01:20,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:01:20,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:01:20,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:01:20,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:01:20,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:01:20,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:01:20,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:01:20,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:01:20,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:01:20,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:01:20,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:01:20,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:01:20,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:01:20,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:01:20,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:01:20,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:01:20,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:01:20,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:01:20,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:01:20,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:01:20,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:01:20,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:01:20,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:01:20,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:01:20,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:01:20,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:01:20,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:01:20,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:01:20,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:01:20,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:01:20,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:01:20,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:01:20,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:01:20,819 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:01:20,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:01:20,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:01:20,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:01:20,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:01:20,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:01:20,821 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:01:20,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:01:20,821 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:01:20,821 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:01:20,822 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:01:20,822 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:01:20,822 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:01:20,822 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:01:20,822 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:01:20,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:01:20,823 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:01:20,823 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:01:20,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:01:20,823 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:01:20,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:01:20,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:01:20,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:01:20,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:01:20,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:01:20,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:01:20,825 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:01:20,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:01:20,825 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:01:20,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:01:20,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:01:20,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:01:20,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:01:20,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:01:20,826 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:01:20,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:01:20,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:01:20,826 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:01:20,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:01:20,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:01:20,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:01:20,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:01:21,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:01:21,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:01:21,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:01:21,069 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:01:21,070 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:01:21,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:01:22,165 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:01:22,377 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:01:22,378 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:01:22,388 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8af62b9da/98e060b1f1a24007a642745c73a1dbad/FLAGd31c86e99 [2023-04-03 02:01:22,399 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8af62b9da/98e060b1f1a24007a642745c73a1dbad [2023-04-03 02:01:22,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:01:22,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:01:22,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:01:22,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:01:22,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:01:22,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2123c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22, skipping insertion in model container [2023-04-03 02:01:22,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:01:22,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:01:22,649 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c[14467,14480] [2023-04-03 02:01:22,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:01:22,661 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:01:22,735 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c[14467,14480] [2023-04-03 02:01:22,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:01:22,749 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:01:22,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22 WrapperNode [2023-04-03 02:01:22,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:01:22,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:01:22,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:01:22,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:01:22,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,815 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:01:22,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:01:22,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:01:22,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:01:22,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (1/1) ... [2023-04-03 02:01:22,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:01:22,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:01:22,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:01:22,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:01:22,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:01:22,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:01:22,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:01:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:01:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:01:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:01:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:01:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:01:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:01:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:01:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:01:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:01:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:01:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:01:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:01:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:01:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:01:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:01:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:01:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:01:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:01:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:01:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:01:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:01:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:01:23,000 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:01:23,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:01:23,530 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:01:23,969 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:01:23,970 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:01:23,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:01:23 BoogieIcfgContainer [2023-04-03 02:01:23,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:01:23,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:01:23,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:01:23,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:01:23,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:01:22" (1/3) ... [2023-04-03 02:01:23,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3523b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:01:23, skipping insertion in model container [2023-04-03 02:01:23,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:01:22" (2/3) ... [2023-04-03 02:01:23,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3523b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:01:23, skipping insertion in model container [2023-04-03 02:01:23,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:01:23" (3/3) ... [2023-04-03 02:01:23,983 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2023-04-03 02:01:23,998 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:01:23,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:01:24,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:01:24,050 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;@2ce74f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:01:24,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:01:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:01:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-03 02:01:24,062 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:24,063 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] [2023-04-03 02:01:24,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:24,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash 956313141, now seen corresponding path program 1 times [2023-04-03 02:01:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:24,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482810741] [2023-04-03 02:01:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:24,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:27,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:27,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482810741] [2023-04-03 02:01:27,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482810741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:27,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:27,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:01:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958755651] [2023-04-03 02:01:27,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:01:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:01:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:27,904 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:28,788 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2023-04-03 02:01:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-03 02:01:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2023-04-03 02:01:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:28,798 INFO L225 Difference]: With dead ends: 111 [2023-04-03 02:01:28,799 INFO L226 Difference]: Without dead ends: 74 [2023-04-03 02:01:28,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2023-04-03 02:01:28,808 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:28,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 137 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:01:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-03 02:01:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2023-04-03 02:01:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-04-03 02:01:28,865 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 34 [2023-04-03 02:01:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:28,866 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-04-03 02:01:28,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-04-03 02:01:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 02:01:28,869 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:28,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:28,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:01:28,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:28,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1542973660, now seen corresponding path program 1 times [2023-04-03 02:01:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:28,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571992926] [2023-04-03 02:01:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:30,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:30,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571992926] [2023-04-03 02:01:30,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571992926] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:30,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:30,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:01:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809632251] [2023-04-03 02:01:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:30,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:01:30,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:01:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:01:30,487 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:30,932 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2023-04-03 02:01:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:01:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2023-04-03 02:01:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:30,934 INFO L225 Difference]: With dead ends: 124 [2023-04-03 02:01:30,934 INFO L226 Difference]: Without dead ends: 88 [2023-04-03 02:01:30,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:30,936 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:30,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 99 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:01:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-03 02:01:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2023-04-03 02:01:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 39 states have internal predecessors, (49), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-04-03 02:01:30,959 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 35 [2023-04-03 02:01:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:30,959 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-04-03 02:01:30,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-04-03 02:01:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 02:01:30,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:30,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:30,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:01:30,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:30,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:30,962 INFO L85 PathProgramCache]: Analyzing trace with hash -638675330, now seen corresponding path program 1 times [2023-04-03 02:01:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:30,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735843446] [2023-04-03 02:01:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:32,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:32,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735843446] [2023-04-03 02:01:32,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735843446] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:32,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:32,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:01:32,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528886281] [2023-04-03 02:01:32,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:32,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:01:32,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:01:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:01:32,431 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:32,829 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2023-04-03 02:01:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:01:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2023-04-03 02:01:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:32,831 INFO L225 Difference]: With dead ends: 131 [2023-04-03 02:01:32,831 INFO L226 Difference]: Without dead ends: 95 [2023-04-03 02:01:32,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:32,832 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:32,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 94 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:01:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-03 02:01:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2023-04-03 02:01:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-04-03 02:01:32,852 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 36 [2023-04-03 02:01:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:32,853 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-04-03 02:01:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-04-03 02:01:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-03 02:01:32,856 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:32,857 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] [2023-04-03 02:01:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:01:32,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:32,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1556394117, now seen corresponding path program 1 times [2023-04-03 02:01:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:32,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070720725] [2023-04-03 02:01:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:34,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:34,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070720725] [2023-04-03 02:01:34,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070720725] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:34,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:34,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:01:34,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546549818] [2023-04-03 02:01:34,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:34,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:01:34,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:34,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:01:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:01:34,277 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:34,720 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2023-04-03 02:01:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:01:34,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-04-03 02:01:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:34,722 INFO L225 Difference]: With dead ends: 138 [2023-04-03 02:01:34,722 INFO L226 Difference]: Without dead ends: 102 [2023-04-03 02:01:34,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:34,723 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:34,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 99 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:01:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-03 02:01:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2023-04-03 02:01:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-04-03 02:01:34,743 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 37 [2023-04-03 02:01:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:34,744 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-04-03 02:01:34,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-04-03 02:01:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 02:01:34,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:34,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:01:34,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:34,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash 997159117, now seen corresponding path program 1 times [2023-04-03 02:01:34,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:34,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082709767] [2023-04-03 02:01:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:36,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082709767] [2023-04-03 02:01:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082709767] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:36,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:36,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:01:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81763224] [2023-04-03 02:01:36,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:36,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:01:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:01:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:01:36,628 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:37,731 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2023-04-03 02:01:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-03 02:01:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2023-04-03 02:01:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:37,733 INFO L225 Difference]: With dead ends: 147 [2023-04-03 02:01:37,733 INFO L226 Difference]: Without dead ends: 111 [2023-04-03 02:01:37,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:01:37,735 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:37,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 157 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:01:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-03 02:01:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2023-04-03 02:01:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-04-03 02:01:37,760 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 39 [2023-04-03 02:01:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:37,760 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-04-03 02:01:37,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-04-03 02:01:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-03 02:01:37,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:37,766 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] [2023-04-03 02:01:37,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:01:37,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:37,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:37,767 INFO L85 PathProgramCache]: Analyzing trace with hash 631974325, now seen corresponding path program 1 times [2023-04-03 02:01:37,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:37,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94138853] [2023-04-03 02:01:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:39,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:39,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94138853] [2023-04-03 02:01:39,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94138853] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:39,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:39,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:01:39,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556178661] [2023-04-03 02:01:39,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:39,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:01:39,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:39,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:01:39,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:01:39,014 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:39,402 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2023-04-03 02:01:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:01:39,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-04-03 02:01:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:39,405 INFO L225 Difference]: With dead ends: 139 [2023-04-03 02:01:39,405 INFO L226 Difference]: Without dead ends: 101 [2023-04-03 02:01:39,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:39,406 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:39,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 90 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:01:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-03 02:01:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2023-04-03 02:01:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 49 states have internal predecessors, (58), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-03 02:01:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-04-03 02:01:39,430 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 40 [2023-04-03 02:01:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:39,431 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-04-03 02:01:39,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-04-03 02:01:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:01:39,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:39,432 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] [2023-04-03 02:01:39,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:01:39,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:39,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 559295803, now seen corresponding path program 1 times [2023-04-03 02:01:39,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:39,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847471193] [2023-04-03 02:01:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:41,272 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 02:01:41,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847471193] [2023-04-03 02:01:41,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847471193] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:41,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:41,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:01:41,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946338618] [2023-04-03 02:01:41,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:41,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:01:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:41,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:01:41,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:41,274 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:42,013 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2023-04-03 02:01:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:01:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2023-04-03 02:01:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:42,014 INFO L225 Difference]: With dead ends: 139 [2023-04-03 02:01:42,014 INFO L226 Difference]: Without dead ends: 101 [2023-04-03 02:01:42,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:01:42,017 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 295 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:42,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 115 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:01:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-03 02:01:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2023-04-03 02:01:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.1875) internal successors, (57), 49 states have internal predecessors, (57), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-03 02:01:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-04-03 02:01:42,043 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 42 [2023-04-03 02:01:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:42,044 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-04-03 02:01:42,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-04-03 02:01:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:01:42,045 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:42,045 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] [2023-04-03 02:01:42,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:01:42,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:42,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1161027427, now seen corresponding path program 1 times [2023-04-03 02:01:42,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:42,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362178349] [2023-04-03 02:01:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:43,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:43,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362178349] [2023-04-03 02:01:43,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362178349] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:43,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:43,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:01:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436486947] [2023-04-03 02:01:43,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:01:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:01:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:01:43,160 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 02:01:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:43,455 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2023-04-03 02:01:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:01:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-03 02:01:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:43,457 INFO L225 Difference]: With dead ends: 107 [2023-04-03 02:01:43,457 INFO L226 Difference]: Without dead ends: 105 [2023-04-03 02:01:43,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:01:43,458 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 36 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:43,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 607 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:01:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-03 02:01:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2023-04-03 02:01:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-03 02:01:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2023-04-03 02:01:43,482 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 43 [2023-04-03 02:01:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:43,483 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2023-04-03 02:01:43,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 02:01:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2023-04-03 02:01:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:01:43,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:43,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:43,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:01:43,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:43,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1804223152, now seen corresponding path program 1 times [2023-04-03 02:01:43,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:43,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910252301] [2023-04-03 02:01:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-03 02:01:47,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910252301] [2023-04-03 02:01:47,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910252301] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:01:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446887244] [2023-04-03 02:01:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:47,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:01:47,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:01:47,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:01:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:01:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:47,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-03 02:01:47,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:02:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:02:00,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:02:01,258 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 7864 disjunctions. This might take some time... [2023-04-03 02:02:04,438 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 7864 disjunctions.