/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:48:19,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:48:19,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:48:19,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:48:19,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:48:19,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:48:19,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:48:19,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:48:19,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:48:19,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:48:19,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:48:19,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:48:19,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:48:19,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:48:19,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:48:19,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:48:19,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:48:19,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:48:19,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:48:19,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:48:19,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:48:19,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:48:19,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:48:19,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:48:19,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:48:19,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:48:19,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:48:19,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:48:19,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:48:19,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:48:19,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:48:19,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:48:19,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:48:19,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:48:19,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:48:19,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:48:19,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:48:19,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:48:19,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:48:19,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:48:19,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:48:19,858 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:48:19,886 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:48:19,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:48:19,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:48:19,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:48:19,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:48:19,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:48:19,888 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:48:19,888 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:48:19,888 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:48:19,888 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:48:19,889 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:48:19,889 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:48:19,889 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:48:19,890 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:48:19,890 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:48:19,890 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:48:19,890 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:48:19,890 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:48:19,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:48:19,891 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:48:19,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:48:19,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:48:19,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:48:19,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:48:19,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:48:19,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:48:19,892 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:48:19,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:48:19,892 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:48:19,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:48:19,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:48:19,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:48:19,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:48:19,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:48:19,893 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:48:19,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:48:19,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:48:19,894 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:48:19,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:48:19,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:48:19,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:48:19,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:48:20,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:48:20,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:48:20,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:48:20,105 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:48:20,106 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:48:20,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:48:21,517 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:48:21,801 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:48:21,801 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:48:21,813 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8925cddf9/3b3e7175bbef42dfb493afc8a5d04d4b/FLAG4fbbf30c5 [2023-04-01 12:48:21,832 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8925cddf9/3b3e7175bbef42dfb493afc8a5d04d4b [2023-04-01 12:48:21,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:48:21,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:48:21,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:48:21,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:48:21,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:48:21,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:48:21" (1/1) ... [2023-04-01 12:48:21,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dfb9b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:21, skipping insertion in model container [2023-04-01 12:48:21,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:48:21" (1/1) ... [2023-04-01 12:48:21,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:48:21,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:48:22,116 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7667,7680] [2023-04-01 12:48:22,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:48:22,151 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:48:22,186 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7667,7680] [2023-04-01 12:48:22,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:48:22,226 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:48:22,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22 WrapperNode [2023-04-01 12:48:22,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:48:22,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:48:22,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:48:22,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:48:22,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,264 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:48:22,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:48:22,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:48:22,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:48:22,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (1/1) ... [2023-04-01 12:48:22,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:48:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:48:22,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:48:22,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:48:22,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:48:22,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:48:22,356 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:48:22,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:48:22,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:48:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:48:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:48:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:48:22,359 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:48:22,360 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:48:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:48:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:48:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:48:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:48:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:48:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:48:22,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:48:22,484 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:48:22,486 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:48:23,007 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:48:23,127 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:48:23,128 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 12:48:23,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:48:23 BoogieIcfgContainer [2023-04-01 12:48:23,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:48:23,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:48:23,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:48:23,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:48:23,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:48:21" (1/3) ... [2023-04-01 12:48:23,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d0b093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:48:23, skipping insertion in model container [2023-04-01 12:48:23,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:48:22" (2/3) ... [2023-04-01 12:48:23,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d0b093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:48:23, skipping insertion in model container [2023-04-01 12:48:23,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:48:23" (3/3) ... [2023-04-01 12:48:23,140 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-01 12:48:23,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:48:23,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:48:23,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:48:23,223 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;@574d46ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:48:23,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:48:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 105 states have (on average 1.7428571428571429) internal successors, (183), 107 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 12:48:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 12:48:23,239 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:23,241 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] [2023-04-01 12:48:23,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:23,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash 616032094, now seen corresponding path program 1 times [2023-04-01 12:48:23,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:23,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398291535] [2023-04-01 12:48:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:23,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:23,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398291535] [2023-04-01 12:48:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398291535] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:23,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:23,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52928608] [2023-04-01 12:48:23,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:23,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:23,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:23,868 INFO L87 Difference]: Start difference. First operand has 112 states, 105 states have (on average 1.7428571428571429) internal successors, (183), 107 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:24,025 INFO L93 Difference]: Finished difference Result 220 states and 341 transitions. [2023-04-01 12:48:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:24,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-01 12:48:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:24,040 INFO L225 Difference]: With dead ends: 220 [2023-04-01 12:48:24,040 INFO L226 Difference]: Without dead ends: 154 [2023-04-01 12:48:24,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:24,047 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 124 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:24,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 312 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:48:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-01 12:48:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2023-04-01 12:48:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.3175675675675675) internal successors, (195), 148 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2023-04-01 12:48:24,136 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 75 [2023-04-01 12:48:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:24,137 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2023-04-01 12:48:24,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,137 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2023-04-01 12:48:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 12:48:24,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:24,139 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] [2023-04-01 12:48:24,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:48:24,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:24,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1833921394, now seen corresponding path program 1 times [2023-04-01 12:48:24,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:24,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542907479] [2023-04-01 12:48:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:24,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542907479] [2023-04-01 12:48:24,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542907479] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:24,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:24,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:24,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394733526] [2023-04-01 12:48:24,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:24,329 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:24,429 INFO L93 Difference]: Finished difference Result 336 states and 470 transitions. [2023-04-01 12:48:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:24,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2023-04-01 12:48:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:24,437 INFO L225 Difference]: With dead ends: 336 [2023-04-01 12:48:24,438 INFO L226 Difference]: Without dead ends: 240 [2023-04-01 12:48:24,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:24,439 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 69 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:24,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 244 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-01 12:48:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2023-04-01 12:48:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 234 states have (on average 1.376068376068376) internal successors, (322), 234 states have internal predecessors, (322), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 325 transitions. [2023-04-01 12:48:24,483 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 325 transitions. Word has length 78 [2023-04-01 12:48:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:24,484 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 325 transitions. [2023-04-01 12:48:24,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 325 transitions. [2023-04-01 12:48:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 12:48:24,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:24,492 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] [2023-04-01 12:48:24,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:48:24,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:24,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:24,493 INFO L85 PathProgramCache]: Analyzing trace with hash -944829408, now seen corresponding path program 1 times [2023-04-01 12:48:24,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:24,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064511969] [2023-04-01 12:48:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:24,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:24,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064511969] [2023-04-01 12:48:24,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064511969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:24,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:24,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470053739] [2023-04-01 12:48:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:24,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:24,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:24,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:24,668 INFO L87 Difference]: Start difference. First operand 238 states and 325 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:24,746 INFO L93 Difference]: Finished difference Result 586 states and 839 transitions. [2023-04-01 12:48:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:24,746 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-01 12:48:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:24,750 INFO L225 Difference]: With dead ends: 586 [2023-04-01 12:48:24,751 INFO L226 Difference]: Without dead ends: 404 [2023-04-01 12:48:24,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:24,760 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 64 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:24,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 240 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-04-01 12:48:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2023-04-01 12:48:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 398 states have (on average 1.4120603015075377) internal successors, (562), 398 states have internal predecessors, (562), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 565 transitions. [2023-04-01 12:48:24,816 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 565 transitions. Word has length 81 [2023-04-01 12:48:24,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:24,819 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 565 transitions. [2023-04-01 12:48:24,819 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 565 transitions. [2023-04-01 12:48:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 12:48:24,822 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:24,822 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] [2023-04-01 12:48:24,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:48:24,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:24,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 755861346, now seen corresponding path program 1 times [2023-04-01 12:48:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:24,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994455059] [2023-04-01 12:48:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:24,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994455059] [2023-04-01 12:48:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994455059] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:24,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:24,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:24,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121244094] [2023-04-01 12:48:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:24,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:24,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:24,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:24,941 INFO L87 Difference]: Start difference. First operand 402 states and 565 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:25,087 INFO L93 Difference]: Finished difference Result 1062 states and 1535 transitions. [2023-04-01 12:48:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2023-04-01 12:48:25,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:25,091 INFO L225 Difference]: With dead ends: 1062 [2023-04-01 12:48:25,091 INFO L226 Difference]: Without dead ends: 716 [2023-04-01 12:48:25,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:25,101 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 59 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:25,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 236 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-04-01 12:48:25,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 714. [2023-04-01 12:48:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 710 states have (on average 1.4281690140845071) internal successors, (1014), 710 states have internal predecessors, (1014), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1017 transitions. [2023-04-01 12:48:25,199 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1017 transitions. Word has length 84 [2023-04-01 12:48:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:25,199 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1017 transitions. [2023-04-01 12:48:25,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1017 transitions. [2023-04-01 12:48:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 12:48:25,200 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:25,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:25,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:48:25,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:25,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1767380866, now seen corresponding path program 1 times [2023-04-01 12:48:25,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:25,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595698393] [2023-04-01 12:48:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:25,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:25,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595698393] [2023-04-01 12:48:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595698393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:25,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735036364] [2023-04-01 12:48:25,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:25,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:25,336 INFO L87 Difference]: Start difference. First operand 714 states and 1017 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:25,609 INFO L93 Difference]: Finished difference Result 1966 states and 2843 transitions. [2023-04-01 12:48:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-01 12:48:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:25,615 INFO L225 Difference]: With dead ends: 1966 [2023-04-01 12:48:25,616 INFO L226 Difference]: Without dead ends: 1308 [2023-04-01 12:48:25,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:25,618 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 54 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:25,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 232 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-04-01 12:48:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1306. [2023-04-01 12:48:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1302 states have (on average 1.4301075268817205) internal successors, (1862), 1302 states have internal predecessors, (1862), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1865 transitions. [2023-04-01 12:48:25,807 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1865 transitions. Word has length 87 [2023-04-01 12:48:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:25,809 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 1865 transitions. [2023-04-01 12:48:25,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1865 transitions. [2023-04-01 12:48:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 12:48:25,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:25,810 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] [2023-04-01 12:48:25,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:48:25,810 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:25,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:25,810 INFO L85 PathProgramCache]: Analyzing trace with hash -587512019, now seen corresponding path program 1 times [2023-04-01 12:48:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572239679] [2023-04-01 12:48:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:25,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:25,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:25,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572239679] [2023-04-01 12:48:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572239679] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:25,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:25,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000071269] [2023-04-01 12:48:25,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:25,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:25,939 INFO L87 Difference]: Start difference. First operand 1306 states and 1865 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:26,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:26,254 INFO L93 Difference]: Finished difference Result 3678 states and 5291 transitions. [2023-04-01 12:48:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2023-04-01 12:48:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:26,261 INFO L225 Difference]: With dead ends: 3678 [2023-04-01 12:48:26,261 INFO L226 Difference]: Without dead ends: 2428 [2023-04-01 12:48:26,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:26,264 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 49 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:26,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 228 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2023-04-01 12:48:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2426. [2023-04-01 12:48:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2422 states have (on average 1.4227910817506193) internal successors, (3446), 2422 states have internal predecessors, (3446), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3449 transitions. [2023-04-01 12:48:26,649 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3449 transitions. Word has length 90 [2023-04-01 12:48:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:26,650 INFO L495 AbstractCegarLoop]: Abstraction has 2426 states and 3449 transitions. [2023-04-01 12:48:26,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3449 transitions. [2023-04-01 12:48:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-04-01 12:48:26,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:26,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:26,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:48:26,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:26,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1562090222, now seen corresponding path program 1 times [2023-04-01 12:48:26,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:26,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157408644] [2023-04-01 12:48:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:26,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:26,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:26,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157408644] [2023-04-01 12:48:26,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157408644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:26,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:26,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:26,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962952245] [2023-04-01 12:48:26,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:26,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:26,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:26,751 INFO L87 Difference]: Start difference. First operand 2426 states and 3449 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:27,664 INFO L93 Difference]: Finished difference Result 6910 states and 9851 transitions. [2023-04-01 12:48:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2023-04-01 12:48:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:27,685 INFO L225 Difference]: With dead ends: 6910 [2023-04-01 12:48:27,685 INFO L226 Difference]: Without dead ends: 4540 [2023-04-01 12:48:27,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:27,695 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 44 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:27,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 224 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2023-04-01 12:48:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 4538. [2023-04-01 12:48:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4538 states, 4534 states have (on average 1.4093515659461844) internal successors, (6390), 4534 states have internal predecessors, (6390), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4538 states to 4538 states and 6393 transitions. [2023-04-01 12:48:28,284 INFO L78 Accepts]: Start accepts. Automaton has 4538 states and 6393 transitions. Word has length 93 [2023-04-01 12:48:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:28,284 INFO L495 AbstractCegarLoop]: Abstraction has 4538 states and 6393 transitions. [2023-04-01 12:48:28,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:28,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4538 states and 6393 transitions. [2023-04-01 12:48:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 12:48:28,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:28,285 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] [2023-04-01 12:48:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:48:28,286 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:28,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash -452899660, now seen corresponding path program 1 times [2023-04-01 12:48:28,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:28,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657893146] [2023-04-01 12:48:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:28,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657893146] [2023-04-01 12:48:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657893146] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:28,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:48:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099296154] [2023-04-01 12:48:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:28,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:48:28,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:48:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:48:28,536 INFO L87 Difference]: Start difference. First operand 4538 states and 6393 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:30,715 INFO L93 Difference]: Finished difference Result 18174 states and 25804 transitions. [2023-04-01 12:48:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:48:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2023-04-01 12:48:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:30,757 INFO L225 Difference]: With dead ends: 18174 [2023-04-01 12:48:30,757 INFO L226 Difference]: Without dead ends: 13692 [2023-04-01 12:48:30,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-04-01 12:48:30,768 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1113 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:30,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 3340 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:48:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13692 states. [2023-04-01 12:48:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13692 to 5942. [2023-04-01 12:48:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5938 states have (on average 1.3986190636577973) internal successors, (8305), 5938 states have internal predecessors, (8305), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 8308 transitions. [2023-04-01 12:48:31,520 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 8308 transitions. Word has length 96 [2023-04-01 12:48:31,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:31,520 INFO L495 AbstractCegarLoop]: Abstraction has 5942 states and 8308 transitions. [2023-04-01 12:48:31,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 8308 transitions. [2023-04-01 12:48:31,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 12:48:31,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:31,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:48:31,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:31,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1956901903, now seen corresponding path program 1 times [2023-04-01 12:48:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:31,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403656562] [2023-04-01 12:48:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:31,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:31,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403656562] [2023-04-01 12:48:31,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403656562] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:31,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:31,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 12:48:31,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734383236] [2023-04-01 12:48:31,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:31,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 12:48:31,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 12:48:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:31,611 INFO L87 Difference]: Start difference. First operand 5942 states and 8308 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:32,704 INFO L93 Difference]: Finished difference Result 15220 states and 21422 transitions. [2023-04-01 12:48:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 12:48:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-04-01 12:48:32,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:32,766 INFO L225 Difference]: With dead ends: 15220 [2023-04-01 12:48:32,766 INFO L226 Difference]: Without dead ends: 9334 [2023-04-01 12:48:32,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 12:48:32,774 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 38 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:32,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 188 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9334 states. [2023-04-01 12:48:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9334 to 9332. [2023-04-01 12:48:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.4044811320754718) internal successors, (13101), 9328 states have internal predecessors, (13101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 13104 transitions. [2023-04-01 12:48:33,651 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 13104 transitions. Word has length 98 [2023-04-01 12:48:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:33,652 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 13104 transitions. [2023-04-01 12:48:33,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 13104 transitions. [2023-04-01 12:48:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 12:48:33,652 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:33,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:33,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 12:48:33,653 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:33,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1976951246, now seen corresponding path program 1 times [2023-04-01 12:48:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:33,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490898413] [2023-04-01 12:48:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:33,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:33,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490898413] [2023-04-01 12:48:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490898413] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:33,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:33,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:48:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289669092] [2023-04-01 12:48:33,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:33,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:48:33,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:48:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:48:33,936 INFO L87 Difference]: Start difference. First operand 9332 states and 13104 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:35,175 INFO L93 Difference]: Finished difference Result 18608 states and 26151 transitions. [2023-04-01 12:48:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 12:48:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-04-01 12:48:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:35,190 INFO L225 Difference]: With dead ends: 18608 [2023-04-01 12:48:35,190 INFO L226 Difference]: Without dead ends: 9334 [2023-04-01 12:48:35,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:48:35,204 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 146 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:35,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 566 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:48:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9334 states. [2023-04-01 12:48:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9334 to 9332. [2023-04-01 12:48:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.4042667238421955) internal successors, (13099), 9328 states have internal predecessors, (13099), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 13102 transitions. [2023-04-01 12:48:36,131 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 13102 transitions. Word has length 98 [2023-04-01 12:48:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:36,132 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 13102 transitions. [2023-04-01 12:48:36,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 13102 transitions. [2023-04-01 12:48:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 12:48:36,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:36,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:36,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-01 12:48:36,133 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:36,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1154037213, now seen corresponding path program 1 times [2023-04-01 12:48:36,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:36,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006349857] [2023-04-01 12:48:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:36,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:36,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006349857] [2023-04-01 12:48:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006349857] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:36,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:36,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:48:36,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933878221] [2023-04-01 12:48:36,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:36,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:48:36,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:36,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:48:36,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:48:36,218 INFO L87 Difference]: Start difference. First operand 9332 states and 13102 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:37,343 INFO L93 Difference]: Finished difference Result 18606 states and 26146 transitions. [2023-04-01 12:48:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:48:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 12:48:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:37,357 INFO L225 Difference]: With dead ends: 18606 [2023-04-01 12:48:37,357 INFO L226 Difference]: Without dead ends: 9332 [2023-04-01 12:48:37,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:48:37,367 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 317 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:37,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 86 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2023-04-01 12:48:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9332. [2023-04-01 12:48:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.3768224699828473) internal successors, (12843), 9328 states have internal predecessors, (12843), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 12846 transitions. [2023-04-01 12:48:38,527 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 12846 transitions. Word has length 99 [2023-04-01 12:48:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:38,527 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 12846 transitions. [2023-04-01 12:48:38,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 12846 transitions. [2023-04-01 12:48:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 12:48:38,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:38,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:38,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 12:48:38,528 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:38,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash 791918488, now seen corresponding path program 1 times [2023-04-01 12:48:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:38,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667722300] [2023-04-01 12:48:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:38,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667722300] [2023-04-01 12:48:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667722300] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:38,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:48:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680136168] [2023-04-01 12:48:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:38,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:48:38,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:48:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:48:38,607 INFO L87 Difference]: Start difference. First operand 9332 states and 12846 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:39,812 INFO L93 Difference]: Finished difference Result 18606 states and 25634 transitions. [2023-04-01 12:48:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:48:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 12:48:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:39,829 INFO L225 Difference]: With dead ends: 18606 [2023-04-01 12:48:39,829 INFO L226 Difference]: Without dead ends: 9332 [2023-04-01 12:48:39,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:48:39,843 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 249 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:39,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 126 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2023-04-01 12:48:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9332. [2023-04-01 12:48:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.3661020583190395) internal successors, (12743), 9328 states have internal predecessors, (12743), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 12746 transitions. [2023-04-01 12:48:41,055 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 12746 transitions. Word has length 99 [2023-04-01 12:48:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:41,055 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 12746 transitions. [2023-04-01 12:48:41,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 12746 transitions. [2023-04-01 12:48:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 12:48:41,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:41,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:41,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-01 12:48:41,056 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:41,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:41,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1657450877, now seen corresponding path program 1 times [2023-04-01 12:48:41,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:41,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540102565] [2023-04-01 12:48:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:41,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:41,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540102565] [2023-04-01 12:48:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540102565] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:41,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:41,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:48:41,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282640251] [2023-04-01 12:48:41,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:41,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:48:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:41,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:48:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:48:41,131 INFO L87 Difference]: Start difference. First operand 9332 states and 12746 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:42,492 INFO L93 Difference]: Finished difference Result 18606 states and 25434 transitions. [2023-04-01 12:48:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:48:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 12:48:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:42,504 INFO L225 Difference]: With dead ends: 18606 [2023-04-01 12:48:42,504 INFO L226 Difference]: Without dead ends: 9332 [2023-04-01 12:48:42,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:48:42,515 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 298 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:42,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 94 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2023-04-01 12:48:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9332. [2023-04-01 12:48:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.3489493996569468) internal successors, (12583), 9328 states have internal predecessors, (12583), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 12586 transitions. [2023-04-01 12:48:43,849 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 12586 transitions. Word has length 99 [2023-04-01 12:48:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:43,849 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 12586 transitions. [2023-04-01 12:48:43,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 12586 transitions. [2023-04-01 12:48:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 12:48:43,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:43,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:43,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-01 12:48:43,850 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:43,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -83966238, now seen corresponding path program 1 times [2023-04-01 12:48:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062613451] [2023-04-01 12:48:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:43,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:43,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:43,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062613451] [2023-04-01 12:48:43,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062613451] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:43,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:43,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:48:43,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733555680] [2023-04-01 12:48:43,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:43,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:48:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:48:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:48:43,929 INFO L87 Difference]: Start difference. First operand 9332 states and 12586 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:45,314 INFO L93 Difference]: Finished difference Result 18606 states and 25114 transitions. [2023-04-01 12:48:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:48:45,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 12:48:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:45,326 INFO L225 Difference]: With dead ends: 18606 [2023-04-01 12:48:45,326 INFO L226 Difference]: Without dead ends: 9332 [2023-04-01 12:48:45,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:48:45,339 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 230 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:45,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 134 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2023-04-01 12:48:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9332. [2023-04-01 12:48:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.338443396226415) internal successors, (12485), 9328 states have internal predecessors, (12485), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 12488 transitions. [2023-04-01 12:48:46,735 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 12488 transitions. Word has length 99 [2023-04-01 12:48:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:46,736 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 12488 transitions. [2023-04-01 12:48:46,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 12488 transitions. [2023-04-01 12:48:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 12:48:46,736 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:46,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:46,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 12:48:46,736 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:46,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash -613256739, now seen corresponding path program 1 times [2023-04-01 12:48:46,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:46,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093246623] [2023-04-01 12:48:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:46,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:46,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:46,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093246623] [2023-04-01 12:48:46,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093246623] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:46,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:46,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:48:46,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734486277] [2023-04-01 12:48:46,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:46,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:48:46,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:48:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:48:46,810 INFO L87 Difference]: Start difference. First operand 9332 states and 12488 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:48,341 INFO L93 Difference]: Finished difference Result 18606 states and 24918 transitions. [2023-04-01 12:48:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:48:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 12:48:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:48,351 INFO L225 Difference]: With dead ends: 18606 [2023-04-01 12:48:48,351 INFO L226 Difference]: Without dead ends: 9332 [2023-04-01 12:48:48,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:48:48,360 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 266 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:48,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 110 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2023-04-01 12:48:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9332. [2023-04-01 12:48:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.3264365351629503) internal successors, (12373), 9328 states have internal predecessors, (12373), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 12376 transitions. [2023-04-01 12:48:49,821 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 12376 transitions. Word has length 99 [2023-04-01 12:48:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:49,822 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 12376 transitions. [2023-04-01 12:48:49,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 12376 transitions. [2023-04-01 12:48:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 12:48:49,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:49,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:49,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-01 12:48:49,823 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:49,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1376120446, now seen corresponding path program 1 times [2023-04-01 12:48:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199442400] [2023-04-01 12:48:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:49,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:49,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199442400] [2023-04-01 12:48:49,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199442400] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:49,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:49,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:48:49,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609110914] [2023-04-01 12:48:49,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:49,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:48:49,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:48:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:48:49,901 INFO L87 Difference]: Start difference. First operand 9332 states and 12376 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:51,597 INFO L93 Difference]: Finished difference Result 18606 states and 24694 transitions. [2023-04-01 12:48:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 12:48:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 12:48:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:51,607 INFO L225 Difference]: With dead ends: 18606 [2023-04-01 12:48:51,607 INFO L226 Difference]: Without dead ends: 9332 [2023-04-01 12:48:51,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 12:48:51,615 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 250 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:51,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 118 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2023-04-01 12:48:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 9332. [2023-04-01 12:48:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9332 states, 9328 states have (on average 1.3152873070325901) internal successors, (12269), 9328 states have internal predecessors, (12269), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9332 states to 9332 states and 12272 transitions. [2023-04-01 12:48:53,222 INFO L78 Accepts]: Start accepts. Automaton has 9332 states and 12272 transitions. Word has length 99 [2023-04-01 12:48:53,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:53,222 INFO L495 AbstractCegarLoop]: Abstraction has 9332 states and 12272 transitions. [2023-04-01 12:48:53,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9332 states and 12272 transitions. [2023-04-01 12:48:53,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 12:48:53,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:53,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:53,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-01 12:48:53,224 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:53,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1248035139, now seen corresponding path program 1 times [2023-04-01 12:48:53,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:53,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860851839] [2023-04-01 12:48:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:48:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:48:53,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:48:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860851839] [2023-04-01 12:48:53,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860851839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:48:53,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:48:53,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 12:48:53,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597554841] [2023-04-01 12:48:53,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:48:53,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 12:48:53,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:48:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 12:48:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 12:48:53,444 INFO L87 Difference]: Start difference. First operand 9332 states and 12272 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:48:56,212 INFO L93 Difference]: Finished difference Result 15845 states and 20664 transitions. [2023-04-01 12:48:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 12:48:56,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-01 12:48:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:48:56,230 INFO L225 Difference]: With dead ends: 15845 [2023-04-01 12:48:56,230 INFO L226 Difference]: Without dead ends: 15843 [2023-04-01 12:48:56,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 12:48:56,234 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 125 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 12:48:56,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 565 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 12:48:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15843 states. [2023-04-01 12:48:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15843 to 9588. [2023-04-01 12:48:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9588 states, 9584 states have (on average 1.2868322203672788) internal successors, (12333), 9584 states have internal predecessors, (12333), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9588 states to 9588 states and 12336 transitions. [2023-04-01 12:48:58,157 INFO L78 Accepts]: Start accepts. Automaton has 9588 states and 12336 transitions. Word has length 99 [2023-04-01 12:48:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:48:58,158 INFO L495 AbstractCegarLoop]: Abstraction has 9588 states and 12336 transitions. [2023-04-01 12:48:58,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 12:48:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9588 states and 12336 transitions. [2023-04-01 12:48:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 12:48:58,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:48:58,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:48:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 12:48:58,159 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:48:58,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:48:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1909749440, now seen corresponding path program 1 times [2023-04-01 12:48:58,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:48:58,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171017662] [2023-04-01 12:48:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:48:58,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:48:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:49:11,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:49:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171017662] [2023-04-01 12:49:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171017662] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:49:11,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356080035] [2023-04-01 12:49:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:49:11,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:49:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:49:11,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:49:11,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:49:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:49:11,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 112 conjunts are in the unsatisfiable core [2023-04-01 12:49:11,339 INFO L285 TraceCheckSpWp]: Computing forward predicates...