/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:21:45,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:21:45,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:21:46,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:21:46,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:21:46,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:21:46,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:21:46,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:21:46,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:21:46,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:21:46,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:21:46,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:21:46,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:21:46,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:21:46,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:21:46,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:21:46,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:21:46,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:21:46,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:21:46,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:21:46,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:21:46,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:21:46,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:21:46,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:21:46,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:21:46,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:21:46,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:21:46,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:21:46,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:21:46,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:21:46,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:21:46,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:21:46,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:21:46,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:21:46,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:21:46,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:21:46,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:21:46,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:21:46,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:21:46,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:21:46,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:21:46,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-03 02:21:46,090 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:21:46,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:21:46,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:21:46,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:21:46,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:21:46,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:21:46,091 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:21:46,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:21:46,092 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:21:46,092 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:21:46,092 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:21:46,092 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:21:46,092 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:21:46,093 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:21:46,093 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:21:46,093 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:21:46,093 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:21:46,093 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:21:46,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:21:46,093 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:21:46,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:21:46,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:21:46,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:21:46,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:21:46,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:21:46,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:21:46,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:21:46,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:21:46,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:21:46,331 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:21:46,332 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:21:46,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:21:47,412 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:21:47,582 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:21:47,582 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:21:47,588 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f048bebde/b762f5ab4b9a47ceb0fc4d2971f26bae/FLAG9b32f28a5 [2023-04-03 02:21:47,598 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f048bebde/b762f5ab4b9a47ceb0fc4d2971f26bae [2023-04-03 02:21:47,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:21:47,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:21:47,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:47,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:21:47,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:21:47,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:47,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3265e0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47, skipping insertion in model container [2023-04-03 02:21:47,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:47,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:21:47,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:21:47,808 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_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-04-03 02:21:47,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:47,855 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:21:47,885 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_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2023-04-03 02:21:47,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:21:47,919 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:21:47,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47 WrapperNode [2023-04-03 02:21:47,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:21:47,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:21:47,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:21:47,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:21:47,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:47,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:47,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:47,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:47,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:47,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:48,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:48,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:48,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:21:48,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:21:48,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:21:48,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:21:48,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (1/1) ... [2023-04-03 02:21:48,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:21:48,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:48,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-03 02:21:48,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-03 02:21:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:21:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:21:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:21:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:21:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:21:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:21:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:21:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:21:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:21:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:21:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:21:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:21:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:21:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:21:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:21:48,235 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:21:48,237 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:21:48,701 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:21:48,844 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:21:48,845 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:21:48,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:48 BoogieIcfgContainer [2023-04-03 02:21:48,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:21:48,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:21:48,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:21:48,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:21:48,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:21:47" (1/3) ... [2023-04-03 02:21:48,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e487568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:48, skipping insertion in model container [2023-04-03 02:21:48,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:21:47" (2/3) ... [2023-04-03 02:21:48,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e487568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:21:48, skipping insertion in model container [2023-04-03 02:21:48,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:21:48" (3/3) ... [2023-04-03 02:21:48,854 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-03 02:21:48,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:21:48,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:21:48,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:21:48,917 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;@275fd158, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:21:48,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:21:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 87 states have (on average 1.7586206896551724) internal successors, (153), 94 states have internal predecessors, (153), 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) [2023-04-03 02:21:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:21:48,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:48,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:48,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:48,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash -459980442, now seen corresponding path program 1 times [2023-04-03 02:21:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:48,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940900014] [2023-04-03 02:21:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:48,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:49,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:49,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940900014] [2023-04-03 02:21:49,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940900014] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:49,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:49,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:49,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336696733] [2023-04-03 02:21:49,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:49,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:49,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:49,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:49,404 INFO L87 Difference]: Start difference. First operand has 99 states, 87 states have (on average 1.7586206896551724) internal successors, (153), 94 states have internal predecessors, (153), 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 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-04-03 02:21:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:49,497 INFO L93 Difference]: Finished difference Result 219 states and 330 transitions. [2023-04-03 02:21:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 42 [2023-04-03 02:21:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:49,512 INFO L225 Difference]: With dead ends: 219 [2023-04-03 02:21:49,512 INFO L226 Difference]: Without dead ends: 133 [2023-04-03 02:21:49,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:49,520 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 97 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:49,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 338 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:49,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-04-03 02:21:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2023-04-03 02:21:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.4094488188976377) internal successors, (179), 127 states have internal predecessors, (179), 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) [2023-04-03 02:21:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 182 transitions. [2023-04-03 02:21:49,564 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 182 transitions. Word has length 42 [2023-04-03 02:21:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:49,565 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 182 transitions. [2023-04-03 02:21:49,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-04-03 02:21:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 182 transitions. [2023-04-03 02:21:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-03 02:21:49,566 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:49,566 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] [2023-04-03 02:21:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:21:49,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:49,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:49,567 INFO L85 PathProgramCache]: Analyzing trace with hash -893402332, now seen corresponding path program 1 times [2023-04-03 02:21:49,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:49,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55234839] [2023-04-03 02:21:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:49,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:49,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:49,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55234839] [2023-04-03 02:21:49,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55234839] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:49,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:49,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:49,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349891771] [2023-04-03 02:21:49,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:49,742 INFO L87 Difference]: Start difference. First operand 131 states and 182 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-04-03 02:21:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:49,807 INFO L93 Difference]: Finished difference Result 276 states and 401 transitions. [2023-04-03 02:21:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 44 [2023-04-03 02:21:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:49,809 INFO L225 Difference]: With dead ends: 276 [2023-04-03 02:21:49,809 INFO L226 Difference]: Without dead ends: 178 [2023-04-03 02:21:49,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:49,811 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 79 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:49,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 172 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-03 02:21:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2023-04-03 02:21:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.4186046511627908) internal successors, (244), 172 states have internal predecessors, (244), 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) [2023-04-03 02:21:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 247 transitions. [2023-04-03 02:21:49,825 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 247 transitions. Word has length 44 [2023-04-03 02:21:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:49,826 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 247 transitions. [2023-04-03 02:21:49,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2023-04-03 02:21:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 247 transitions. [2023-04-03 02:21:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 02:21:49,827 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:49,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:21:49,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:21:49,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:49,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2072365937, now seen corresponding path program 1 times [2023-04-03 02:21:49,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:49,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567196713] [2023-04-03 02:21:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:49,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:49,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:49,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567196713] [2023-04-03 02:21:49,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567196713] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:49,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:49,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800072222] [2023-04-03 02:21:49,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:49,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:49,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:49,940 INFO L87 Difference]: Start difference. First operand 176 states and 247 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-03 02:21:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:50,000 INFO L93 Difference]: Finished difference Result 422 states and 614 transitions. [2023-04-03 02:21:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 46 [2023-04-03 02:21:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:50,004 INFO L225 Difference]: With dead ends: 422 [2023-04-03 02:21:50,004 INFO L226 Difference]: Without dead ends: 281 [2023-04-03 02:21:50,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:50,012 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 79 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:50,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 237 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-04-03 02:21:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2023-04-03 02:21:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 275 states have (on average 1.4363636363636363) internal successors, (395), 275 states have internal predecessors, (395), 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) [2023-04-03 02:21:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 398 transitions. [2023-04-03 02:21:50,056 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 398 transitions. Word has length 46 [2023-04-03 02:21:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:50,057 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 398 transitions. [2023-04-03 02:21:50,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-03 02:21:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 398 transitions. [2023-04-03 02:21:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 02:21:50,060 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:50,060 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] [2023-04-03 02:21:50,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:21:50,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:50,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash 460054954, now seen corresponding path program 1 times [2023-04-03 02:21:50,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:50,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79081737] [2023-04-03 02:21:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:50,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:50,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:50,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79081737] [2023-04-03 02:21:50,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79081737] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:50,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:50,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:50,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971078368] [2023-04-03 02:21:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:50,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:50,169 INFO L87 Difference]: Start difference. First operand 279 states and 398 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2023-04-03 02:21:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:50,215 INFO L93 Difference]: Finished difference Result 677 states and 992 transitions. [2023-04-03 02:21:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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 48 [2023-04-03 02:21:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:50,219 INFO L225 Difference]: With dead ends: 677 [2023-04-03 02:21:50,220 INFO L226 Difference]: Without dead ends: 433 [2023-04-03 02:21:50,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:50,228 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 78 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:50,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 205 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-04-03 02:21:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2023-04-03 02:21:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 427 states have (on average 1.4566744730679158) internal successors, (622), 427 states have internal predecessors, (622), 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) [2023-04-03 02:21:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 625 transitions. [2023-04-03 02:21:50,258 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 625 transitions. Word has length 48 [2023-04-03 02:21:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:50,258 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 625 transitions. [2023-04-03 02:21:50,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2023-04-03 02:21:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 625 transitions. [2023-04-03 02:21:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-03 02:21:50,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:50,262 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] [2023-04-03 02:21:50,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:21:50,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:50,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2112125181, now seen corresponding path program 1 times [2023-04-03 02:21:50,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:50,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733219180] [2023-04-03 02:21:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:50,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:50,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:50,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733219180] [2023-04-03 02:21:50,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733219180] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:50,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:50,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646928396] [2023-04-03 02:21:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:50,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:50,338 INFO L87 Difference]: Start difference. First operand 431 states and 625 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-04-03 02:21:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:50,409 INFO L93 Difference]: Finished difference Result 1089 states and 1596 transitions. [2023-04-03 02:21:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 50 [2023-04-03 02:21:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:50,417 INFO L225 Difference]: With dead ends: 1089 [2023-04-03 02:21:50,417 INFO L226 Difference]: Without dead ends: 706 [2023-04-03 02:21:50,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:50,418 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 74 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:50,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 218 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-04-03 02:21:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2023-04-03 02:21:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 700 states have (on average 1.4457142857142857) internal successors, (1012), 700 states have internal predecessors, (1012), 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) [2023-04-03 02:21:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1015 transitions. [2023-04-03 02:21:50,471 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1015 transitions. Word has length 50 [2023-04-03 02:21:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:50,472 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1015 transitions. [2023-04-03 02:21:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2023-04-03 02:21:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1015 transitions. [2023-04-03 02:21:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-03 02:21:50,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:50,474 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] [2023-04-03 02:21:50,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:21:50,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:50,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash -76941885, now seen corresponding path program 1 times [2023-04-03 02:21:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:50,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316116592] [2023-04-03 02:21:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:50,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:50,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316116592] [2023-04-03 02:21:50,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316116592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:50,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:50,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:21:50,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938537914] [2023-04-03 02:21:50,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:50,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:21:50,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:21:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:50,581 INFO L87 Difference]: Start difference. First operand 704 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-04-03 02:21:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:50,699 INFO L93 Difference]: Finished difference Result 1756 states and 2566 transitions. [2023-04-03 02:21:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:21:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2023-04-03 02:21:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:50,704 INFO L225 Difference]: With dead ends: 1756 [2023-04-03 02:21:50,704 INFO L226 Difference]: Without dead ends: 1100 [2023-04-03 02:21:50,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:21:50,705 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 73 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:50,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 207 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-04-03 02:21:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1098. [2023-04-03 02:21:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1094 states have (on average 1.4552102376599634) internal successors, (1592), 1094 states have internal predecessors, (1592), 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) [2023-04-03 02:21:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1595 transitions. [2023-04-03 02:21:50,790 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1595 transitions. Word has length 52 [2023-04-03 02:21:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:50,790 INFO L495 AbstractCegarLoop]: Abstraction has 1098 states and 1595 transitions. [2023-04-03 02:21:50,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-04-03 02:21:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1595 transitions. [2023-04-03 02:21:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-03 02:21:50,791 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:50,791 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] [2023-04-03 02:21:50,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:21:50,791 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:50,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1504811696, now seen corresponding path program 1 times [2023-04-03 02:21:50,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:50,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305992574] [2023-04-03 02:21:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:50,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:50,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:50,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305992574] [2023-04-03 02:21:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305992574] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:50,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:50,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275914743] [2023-04-03 02:21:50,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:50,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:50,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:50,901 INFO L87 Difference]: Start difference. First operand 1098 states and 1595 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2023-04-03 02:21:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:51,231 INFO L93 Difference]: Finished difference Result 3458 states and 5060 transitions. [2023-04-03 02:21:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:21:51,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 54 [2023-04-03 02:21:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:51,241 INFO L225 Difference]: With dead ends: 3458 [2023-04-03 02:21:51,242 INFO L226 Difference]: Without dead ends: 2403 [2023-04-03 02:21:51,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-03 02:21:51,244 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 439 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:51,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 817 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:21:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2023-04-03 02:21:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 1710. [2023-04-03 02:21:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1706 states have (on average 1.4607268464243846) internal successors, (2492), 1706 states have internal predecessors, (2492), 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) [2023-04-03 02:21:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2495 transitions. [2023-04-03 02:21:51,378 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2495 transitions. Word has length 54 [2023-04-03 02:21:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:51,379 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 2495 transitions. [2023-04-03 02:21:51,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2023-04-03 02:21:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2495 transitions. [2023-04-03 02:21:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-03 02:21:51,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:51,380 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] [2023-04-03 02:21:51,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:21:51,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:51,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash 533867218, now seen corresponding path program 1 times [2023-04-03 02:21:51,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:51,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466108606] [2023-04-03 02:21:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:51,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:51,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:51,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466108606] [2023-04-03 02:21:51,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466108606] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:51,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:51,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-03 02:21:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986407059] [2023-04-03 02:21:51,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-03 02:21:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-03 02:21:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-03 02:21:51,491 INFO L87 Difference]: Start difference. First operand 1710 states and 2495 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-04-03 02:21:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:51,738 INFO L93 Difference]: Finished difference Result 4012 states and 5876 transitions. [2023-04-03 02:21:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-03 02:21:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 55 [2023-04-03 02:21:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:51,749 INFO L225 Difference]: With dead ends: 4012 [2023-04-03 02:21:51,749 INFO L226 Difference]: Without dead ends: 2363 [2023-04-03 02:21:51,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:51,755 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 145 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:51,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 302 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-04-03 02:21:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2358. [2023-04-03 02:21:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2354 states have (on average 1.4592183517417163) internal successors, (3435), 2354 states have internal predecessors, (3435), 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) [2023-04-03 02:21:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 3438 transitions. [2023-04-03 02:21:51,967 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 3438 transitions. Word has length 55 [2023-04-03 02:21:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:51,967 INFO L495 AbstractCegarLoop]: Abstraction has 2358 states and 3438 transitions. [2023-04-03 02:21:51,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2023-04-03 02:21:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 3438 transitions. [2023-04-03 02:21:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-03 02:21:51,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:51,968 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] [2023-04-03 02:21:51,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:21:51,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:51,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash 339509606, now seen corresponding path program 1 times [2023-04-03 02:21:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:51,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192367566] [2023-04-03 02:21:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:21:52,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192367566] [2023-04-03 02:21:52,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192367566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:52,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:21:52,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:21:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019113283] [2023-04-03 02:21:52,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:21:52,203 INFO L87 Difference]: Start difference. First operand 2358 states and 3438 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-04-03 02:21:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:52,554 INFO L93 Difference]: Finished difference Result 3980 states and 5747 transitions. [2023-04-03 02:21:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:21:52,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 63 [2023-04-03 02:21:52,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:52,569 INFO L225 Difference]: With dead ends: 3980 [2023-04-03 02:21:52,569 INFO L226 Difference]: Without dead ends: 3978 [2023-04-03 02:21:52,571 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 [2023-04-03 02:21:52,571 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 148 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:52,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 588 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:52,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2023-04-03 02:21:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 2410. [2023-04-03 02:21:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2406 states have (on average 1.4376558603491272) internal successors, (3459), 2406 states have internal predecessors, (3459), 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) [2023-04-03 02:21:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3462 transitions. [2023-04-03 02:21:52,817 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3462 transitions. Word has length 63 [2023-04-03 02:21:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:52,817 INFO L495 AbstractCegarLoop]: Abstraction has 2410 states and 3462 transitions. [2023-04-03 02:21:52,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-04-03 02:21:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3462 transitions. [2023-04-03 02:21:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-03 02:21:52,818 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:52,819 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:21:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-03 02:21:52,819 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:52,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1480269234, now seen corresponding path program 1 times [2023-04-03 02:21:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:52,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749802270] [2023-04-03 02:21:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:52,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:53,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:53,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749802270] [2023-04-03 02:21:53,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749802270] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:53,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468667705] [2023-04-03 02:21:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:53,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:53,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:53,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:53,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:21:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:53,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:53,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-03 02:21:54,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:54,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468667705] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:54,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:54,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436943137] [2023-04-03 02:21:54,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:54,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:54,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:54,320 INFO L87 Difference]: Start difference. First operand 2410 states and 3462 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-04-03 02:21:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:55,080 INFO L93 Difference]: Finished difference Result 6999 states and 10074 transitions. [2023-04-03 02:21:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:55,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 71 [2023-04-03 02:21:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:55,095 INFO L225 Difference]: With dead ends: 6999 [2023-04-03 02:21:55,096 INFO L226 Difference]: Without dead ends: 4635 [2023-04-03 02:21:55,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:55,102 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 261 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:55,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 300 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2023-04-03 02:21:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4633. [2023-04-03 02:21:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4629 states have (on average 1.4309786130913804) internal successors, (6624), 4629 states have internal predecessors, (6624), 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) [2023-04-03 02:21:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 6627 transitions. [2023-04-03 02:21:55,674 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 6627 transitions. Word has length 71 [2023-04-03 02:21:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:55,675 INFO L495 AbstractCegarLoop]: Abstraction has 4633 states and 6627 transitions. [2023-04-03 02:21:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-04-03 02:21:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 6627 transitions. [2023-04-03 02:21:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-03 02:21:55,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:55,679 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:21:55,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 02:21:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-03 02:21:55,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:55,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2075950183, now seen corresponding path program 1 times [2023-04-03 02:21:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:55,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826518835] [2023-04-03 02:21:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:55,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:21:56,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:21:56,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826518835] [2023-04-03 02:21:56,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826518835] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:21:56,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170019850] [2023-04-03 02:21:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:56,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:21:56,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:21:56,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:21:56,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-03 02:21:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:21:56,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:21:56,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:21:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:21:57,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:21:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170019850] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:21:57,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:21:57,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:21:57,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525954583] [2023-04-03 02:21:57,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:21:57,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:21:57,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:21:57,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:21:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:21:57,125 INFO L87 Difference]: Start difference. First operand 4633 states and 6627 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2023-04-03 02:21:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:21:58,389 INFO L93 Difference]: Finished difference Result 13427 states and 19211 transitions. [2023-04-03 02:21:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:21:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 74 [2023-04-03 02:21:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:21:58,437 INFO L225 Difference]: With dead ends: 13427 [2023-04-03 02:21:58,437 INFO L226 Difference]: Without dead ends: 8867 [2023-04-03 02:21:58,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:21:58,446 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 251 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:21:58,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 302 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:21:58,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2023-04-03 02:21:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 8865. [2023-04-03 02:21:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8865 states, 8861 states have (on average 1.4204943008689763) internal successors, (12587), 8861 states have internal predecessors, (12587), 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) [2023-04-03 02:21:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8865 states to 8865 states and 12590 transitions. [2023-04-03 02:21:59,558 INFO L78 Accepts]: Start accepts. Automaton has 8865 states and 12590 transitions. Word has length 74 [2023-04-03 02:21:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:21:59,558 INFO L495 AbstractCegarLoop]: Abstraction has 8865 states and 12590 transitions. [2023-04-03 02:21:59,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2023-04-03 02:21:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8865 states and 12590 transitions. [2023-04-03 02:21:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-03 02:21:59,559 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:21:59,559 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:21:59,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-03 02:21:59,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-03 02:21:59,763 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:21:59,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:21:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1387617010, now seen corresponding path program 1 times [2023-04-03 02:21:59,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:21:59,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365535668] [2023-04-03 02:21:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:21:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:21:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:22:00,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:00,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365535668] [2023-04-03 02:22:00,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365535668] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:22:00,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756907482] [2023-04-03 02:22:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:00,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:00,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:00,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:22:00,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-03 02:22:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:00,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-03 02:22:00,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:22:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:22:01,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:22:01,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756907482] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:01,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:22:01,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-04-03 02:22:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233514541] [2023-04-03 02:22:01,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:01,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:22:01,158 INFO L87 Difference]: Start difference. First operand 8865 states and 12590 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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) [2023-04-03 02:22:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:03,749 INFO L93 Difference]: Finished difference Result 25869 states and 36728 transitions. [2023-04-03 02:22:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:22:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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 77 [2023-04-03 02:22:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:03,788 INFO L225 Difference]: With dead ends: 25869 [2023-04-03 02:22:03,789 INFO L226 Difference]: Without dead ends: 17087 [2023-04-03 02:22:03,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:22:03,809 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 305 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:03,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 262 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17087 states. [2023-04-03 02:22:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17087 to 17085. [2023-04-03 02:22:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17085 states, 17081 states have (on average 1.4106316960365317) internal successors, (24095), 17081 states have internal predecessors, (24095), 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) [2023-04-03 02:22:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17085 states to 17085 states and 24098 transitions. [2023-04-03 02:22:06,370 INFO L78 Accepts]: Start accepts. Automaton has 17085 states and 24098 transitions. Word has length 77 [2023-04-03 02:22:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:06,370 INFO L495 AbstractCegarLoop]: Abstraction has 17085 states and 24098 transitions. [2023-04-03 02:22:06,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 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) [2023-04-03 02:22:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 17085 states and 24098 transitions. [2023-04-03 02:22:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:22:06,372 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:06,373 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:22:06,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-03 02:22:06,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:06,580 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:06,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash -698073172, now seen corresponding path program 1 times [2023-04-03 02:22:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:06,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353555675] [2023-04-03 02:22:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:22:06,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:06,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353555675] [2023-04-03 02:22:06,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353555675] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:06,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:06,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:22:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580180733] [2023-04-03 02:22:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:06,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:06,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:22:06,698 INFO L87 Difference]: Start difference. First operand 17085 states and 24098 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2023-04-03 02:22:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:09,825 INFO L93 Difference]: Finished difference Result 34087 states and 48095 transitions. [2023-04-03 02:22:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:22:09,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 80 [2023-04-03 02:22:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:09,869 INFO L225 Difference]: With dead ends: 34087 [2023-04-03 02:22:09,870 INFO L226 Difference]: Without dead ends: 17085 [2023-04-03 02:22:09,894 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 [2023-04-03 02:22:09,894 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 261 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:09,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 109 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:09,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17085 states. [2023-04-03 02:22:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17085 to 17085. [2023-04-03 02:22:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17085 states, 17081 states have (on average 1.386042971722967) internal successors, (23675), 17081 states have internal predecessors, (23675), 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) [2023-04-03 02:22:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17085 states to 17085 states and 23678 transitions. [2023-04-03 02:22:12,707 INFO L78 Accepts]: Start accepts. Automaton has 17085 states and 23678 transitions. Word has length 80 [2023-04-03 02:22:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:12,708 INFO L495 AbstractCegarLoop]: Abstraction has 17085 states and 23678 transitions. [2023-04-03 02:22:12,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2023-04-03 02:22:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 17085 states and 23678 transitions. [2023-04-03 02:22:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:22:12,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:12,709 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:22:12,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-03 02:22:12,709 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:12,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1663525103, now seen corresponding path program 1 times [2023-04-03 02:22:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:12,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870091877] [2023-04-03 02:22:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:22:13,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870091877] [2023-04-03 02:22:13,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870091877] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:22:13,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774849636] [2023-04-03 02:22:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:13,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:13,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:22:13,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-03 02:22:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:13,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 02:22:13,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:22:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:22:14,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:22:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774849636] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:14,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:22:14,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-04-03 02:22:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728937678] [2023-04-03 02:22:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:14,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:22:14,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:22:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-03 02:22:14,365 INFO L87 Difference]: Start difference. First operand 17085 states and 23678 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2023-04-03 02:22:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:16,681 INFO L93 Difference]: Finished difference Result 30225 states and 41824 transitions. [2023-04-03 02:22:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:22:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 80 [2023-04-03 02:22:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:16,710 INFO L225 Difference]: With dead ends: 30225 [2023-04-03 02:22:16,710 INFO L226 Difference]: Without dead ends: 13221 [2023-04-03 02:22:16,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:22:16,739 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 369 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:16,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 246 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13221 states. [2023-04-03 02:22:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13221 to 13136. [2023-04-03 02:22:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13132 states have (on average 1.3826530612244898) internal successors, (18157), 13132 states have internal predecessors, (18157), 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) [2023-04-03 02:22:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 18160 transitions. [2023-04-03 02:22:18,856 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 18160 transitions. Word has length 80 [2023-04-03 02:22:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:18,856 INFO L495 AbstractCegarLoop]: Abstraction has 13136 states and 18160 transitions. [2023-04-03 02:22:18,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2023-04-03 02:22:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 18160 transitions. [2023-04-03 02:22:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:22:18,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:18,857 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:22:18,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-03 02:22:19,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:19,062 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:19,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1138577146, now seen corresponding path program 1 times [2023-04-03 02:22:19,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:19,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059923094] [2023-04-03 02:22:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-03 02:22:19,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:19,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059923094] [2023-04-03 02:22:19,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059923094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:19,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:22:19,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:22:19,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462339595] [2023-04-03 02:22:19,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:19,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:22:19,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:22:19,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:22:19,159 INFO L87 Difference]: Start difference. First operand 13136 states and 18160 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2023-04-03 02:22:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:21,401 INFO L93 Difference]: Finished difference Result 26212 states and 36248 transitions. [2023-04-03 02:22:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:22:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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 80 [2023-04-03 02:22:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:21,438 INFO L225 Difference]: With dead ends: 26212 [2023-04-03 02:22:21,439 INFO L226 Difference]: Without dead ends: 13136 [2023-04-03 02:22:21,463 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 [2023-04-03 02:22:21,463 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 265 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:21,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 107 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13136 states. [2023-04-03 02:22:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13136 to 13136. [2023-04-03 02:22:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13132 states have (on average 1.3511270179713677) internal successors, (17743), 13132 states have internal predecessors, (17743), 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) [2023-04-03 02:22:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 17746 transitions. [2023-04-03 02:22:23,631 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 17746 transitions. Word has length 80 [2023-04-03 02:22:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:23,631 INFO L495 AbstractCegarLoop]: Abstraction has 13136 states and 17746 transitions. [2023-04-03 02:22:23,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 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) [2023-04-03 02:22:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 17746 transitions. [2023-04-03 02:22:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:22:23,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:23,633 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:22:23,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-03 02:22:23,633 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:23,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash 981629279, now seen corresponding path program 1 times [2023-04-03 02:22:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476429526] [2023-04-03 02:22:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:22:24,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:24,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476429526] [2023-04-03 02:22:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476429526] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:22:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303329960] [2023-04-03 02:22:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:24,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:24,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:24,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:22:24,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-03 02:22:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:24,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-03 02:22:24,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:22:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:22:25,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-03 02:22:25,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303329960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:22:25,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-03 02:22:25,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-04-03 02:22:25,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541158034] [2023-04-03 02:22:25,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:22:25,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-03 02:22:25,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:22:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-03 02:22:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-04-03 02:22:25,192 INFO L87 Difference]: Start difference. First operand 13136 states and 17746 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2023-04-03 02:22:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:22:29,848 INFO L93 Difference]: Finished difference Result 32529 states and 43828 transitions. [2023-04-03 02:22:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-03 02:22:29,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 80 [2023-04-03 02:22:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:22:29,892 INFO L225 Difference]: With dead ends: 32529 [2023-04-03 02:22:29,892 INFO L226 Difference]: Without dead ends: 25790 [2023-04-03 02:22:29,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:22:29,904 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 430 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:22:29,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 317 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:22:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25790 states. [2023-04-03 02:22:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25790 to 19472. [2023-04-03 02:22:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19472 states, 19468 states have (on average 1.3390178754879802) internal successors, (26068), 19468 states have internal predecessors, (26068), 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) [2023-04-03 02:22:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19472 states to 19472 states and 26071 transitions. [2023-04-03 02:22:33,586 INFO L78 Accepts]: Start accepts. Automaton has 19472 states and 26071 transitions. Word has length 80 [2023-04-03 02:22:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:22:33,586 INFO L495 AbstractCegarLoop]: Abstraction has 19472 states and 26071 transitions. [2023-04-03 02:22:33,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2023-04-03 02:22:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 19472 states and 26071 transitions. [2023-04-03 02:22:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-03 02:22:33,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:22:33,588 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-03 02:22:33,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-03 02:22:33,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-03 02:22:33,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:22:33,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:22:33,790 INFO L85 PathProgramCache]: Analyzing trace with hash 355102993, now seen corresponding path program 1 times [2023-04-03 02:22:33,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:22:33,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672577154] [2023-04-03 02:22:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:33,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:22:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:22:34,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:22:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672577154] [2023-04-03 02:22:34,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672577154] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:22:34,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120168111] [2023-04-03 02:22:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:22:34,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:22:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:22:34,389 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:22:34,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-03 02:22:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:22:34,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-03 02:22:34,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:22:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 02:22:35,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:22:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:22:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120168111] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:22:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263001739] [2023-04-03 02:22:36,663 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2023-04-03 02:22:36,663 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:22:36,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:22:36,673 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:22:36,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:22:37,551 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs