/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:00:51,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:00:51,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:00:51,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:00:51,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:00:51,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:00:51,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:00:51,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:00:51,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:00:51,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:00:51,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:00:51,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:00:51,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:00:51,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:00:51,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:00:51,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:00:51,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:00:51,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:00:51,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:00:51,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:00:51,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:00:51,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:00:51,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:00:51,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:00:51,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:00:51,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:00:51,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:00:51,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:00:51,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:00:51,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:00:51,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:00:51,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:00:51,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:00:51,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:00:51,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:00:51,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:00:51,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:00:51,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:00:51,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:00:51,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:00:51,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:00:51,160 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 02:00:51,189 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:00:51,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:00:51,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:00:51,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:00:51,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:00:51,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:00:51,191 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:00:51,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:00:51,191 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:00:51,191 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:00:51,192 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:00:51,192 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:00:51,192 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:00:51,193 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:00:51,193 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:00:51,193 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:00:51,193 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:00:51,193 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:00:51,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:00:51,194 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:00:51,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:00:51,195 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:00:51,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:00:51,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:00:51,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:00:51,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:00:51,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:00:51,195 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:00:51,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:00:51,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:00:51,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:00:51,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:00:51,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:00:51,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:00:51,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:00:51,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:00:51,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:00:51,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:00:51,446 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:00:51,447 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:00:51,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:00:52,590 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:00:52,807 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:00:52,808 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:00:52,816 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9833aa3/a682e431247b405dbe5ae83ecd945c01/FLAGa40ee45a5 [2023-04-03 02:00:52,830 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a9833aa3/a682e431247b405dbe5ae83ecd945c01 [2023-04-03 02:00:52,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:00:52,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:00:52,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:00:52,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:00:52,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:00:52,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:00:52" (1/1) ... [2023-04-03 02:00:52,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ae7d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:52, skipping insertion in model container [2023-04-03 02:00:52,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:00:52" (1/1) ... [2023-04-03 02:00:52,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:00:52,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:00:53,076 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c[14511,14524] [2023-04-03 02:00:53,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:00:53,088 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:00:53,160 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c[14511,14524] [2023-04-03 02:00:53,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:00:53,174 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:00:53,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53 WrapperNode [2023-04-03 02:00:53,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:00:53,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:00:53,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:00:53,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:00:53,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,216 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:00:53,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:00:53,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:00:53,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:00:53,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (1/1) ... [2023-04-03 02:00:53,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:00:53,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:00:53,287 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 02:00:53,306 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 02:00:53,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:00:53,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:00:53,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:00:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:00:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 02:00:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 02:00:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 02:00:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 02:00:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 02:00:53,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:00:53,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 02:00:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:00:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:00:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:00:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:00:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:00:53,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-03 02:00:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:00:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:00:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:00:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:00:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:00:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:00:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:00:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:00:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:00:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:00:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:00:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:00:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:00:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:00:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:00:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:00:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:00:53,475 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:00:53,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:00:53,969 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:00:54,450 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:00:54,450 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 02:00:54,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:00:54 BoogieIcfgContainer [2023-04-03 02:00:54,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:00:54,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:00:54,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:00:54,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:00:54,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:00:52" (1/3) ... [2023-04-03 02:00:54,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6790f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:00:54, skipping insertion in model container [2023-04-03 02:00:54,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:00:53" (2/3) ... [2023-04-03 02:00:54,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6790f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:00:54, skipping insertion in model container [2023-04-03 02:00:54,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:00:54" (3/3) ... [2023-04-03 02:00:54,460 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c [2023-04-03 02:00:54,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:00:54,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:00:54,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:00:54,526 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;@59e3585a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:00:54,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:00:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-03 02:00:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-03 02:00:54,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:54,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:00:54,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:54,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1768936968, now seen corresponding path program 1 times [2023-04-03 02:00:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:54,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055516527] [2023-04-03 02:00:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:54,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:00:58,369 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 02:00:58,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:00:58,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055516527] [2023-04-03 02:00:58,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055516527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:00:58,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:00:58,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-03 02:00:58,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509904644] [2023-04-03 02:00:58,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:00:58,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-03 02:00:58,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:00:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-03 02:00:58,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:00:58,400 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 32 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:00:59,371 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2023-04-03 02:00:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-03 02:00:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2023-04-03 02:00:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:00:59,380 INFO L225 Difference]: With dead ends: 111 [2023-04-03 02:00:59,383 INFO L226 Difference]: Without dead ends: 74 [2023-04-03 02:00:59,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-04-03 02:00:59,397 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:00:59,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 136 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:00:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-03 02:00:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2023-04-03 02:00:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:00:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-04-03 02:00:59,443 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 34 [2023-04-03 02:00:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:00:59,444 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-04-03 02:00:59,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:00:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-04-03 02:00:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-03 02:00:59,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:00:59,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:00:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:00:59,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:00:59,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:00:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1302105785, now seen corresponding path program 1 times [2023-04-03 02:00:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:00:59,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383255607] [2023-04-03 02:00:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:00:59,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:00:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:01,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:01,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383255607] [2023-04-03 02:01:01,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383255607] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:01,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:01,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:01:01,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398683690] [2023-04-03 02:01:01,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:01,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:01:01,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:01:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:01:01,484 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 18 states, 10 states have (on average 1.9) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:02,377 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2023-04-03 02:01:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-03 02:01:02,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 1.9) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2023-04-03 02:01:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:02,379 INFO L225 Difference]: With dead ends: 124 [2023-04-03 02:01:02,379 INFO L226 Difference]: Without dead ends: 88 [2023-04-03 02:01:02,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=990, Unknown=0, NotChecked=0, Total=1260 [2023-04-03 02:01:02,381 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 236 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:02,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 151 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 02:01:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-03 02:01:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2023-04-03 02:01:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 39 states have internal predecessors, (49), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2023-04-03 02:01:02,412 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 35 [2023-04-03 02:01:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:02,412 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2023-04-03 02:01:02,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 1.9) internal successors, (19), 12 states have internal predecessors, (19), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:02,413 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2023-04-03 02:01:02,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-03 02:01:02,414 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:02,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:02,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:01:02,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:02,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1173105279, now seen corresponding path program 1 times [2023-04-03 02:01:02,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:02,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689394657] [2023-04-03 02:01:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:02,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:03,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:03,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689394657] [2023-04-03 02:01:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689394657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:03,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:03,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:01:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099684669] [2023-04-03 02:01:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:03,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:01:03,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:01:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:01:03,958 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:04,389 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2023-04-03 02:01:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:01:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 36 [2023-04-03 02:01:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:04,391 INFO L225 Difference]: With dead ends: 131 [2023-04-03 02:01:04,391 INFO L226 Difference]: Without dead ends: 95 [2023-04-03 02:01:04,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:04,393 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:04,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 88 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:01:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-03 02:01:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2023-04-03 02:01:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 40 states have internal predecessors, (50), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-04-03 02:01:04,420 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 36 [2023-04-03 02:01:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:04,420 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-04-03 02:01:04,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 2.857142857142857) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-04-03 02:01:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-03 02:01:04,429 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:04,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:04,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:01:04,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:04,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash 511474466, now seen corresponding path program 1 times [2023-04-03 02:01:04,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:04,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471916593] [2023-04-03 02:01:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:05,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:05,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471916593] [2023-04-03 02:01:05,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471916593] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:05,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:05,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:01:05,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340960334] [2023-04-03 02:01:05,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:05,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:01:05,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:05,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:01:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:01:05,891 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:06,326 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2023-04-03 02:01:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:01:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-04-03 02:01:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:06,328 INFO L225 Difference]: With dead ends: 138 [2023-04-03 02:01:06,328 INFO L226 Difference]: Without dead ends: 102 [2023-04-03 02:01:06,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:06,329 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:06,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 90 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-03 02:01:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-03 02:01:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2023-04-03 02:01:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2023-04-03 02:01:06,349 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 37 [2023-04-03 02:01:06,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:06,350 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2023-04-03 02:01:06,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2023-04-03 02:01:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-03 02:01:06,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:06,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:06,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:01:06,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:06,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash 352596010, now seen corresponding path program 1 times [2023-04-03 02:01:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:06,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618267927] [2023-04-03 02:01:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:08,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:08,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618267927] [2023-04-03 02:01:08,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618267927] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:08,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:08,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:01:08,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424788493] [2023-04-03 02:01:08,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:08,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:01:08,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:08,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:01:08,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:01:08,327 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:09,407 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2023-04-03 02:01:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-03 02:01:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2023-04-03 02:01:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:09,409 INFO L225 Difference]: With dead ends: 147 [2023-04-03 02:01:09,409 INFO L226 Difference]: Without dead ends: 111 [2023-04-03 02:01:09,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:01:09,411 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 308 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:09,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 147 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:01:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-04-03 02:01:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2023-04-03 02:01:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-03 02:01:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-04-03 02:01:09,433 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 39 [2023-04-03 02:01:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:09,433 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-04-03 02:01:09,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-04-03 02:01:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-03 02:01:09,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:09,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:09,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:01:09,434 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:09,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:09,435 INFO L85 PathProgramCache]: Analyzing trace with hash 467894072, now seen corresponding path program 1 times [2023-04-03 02:01:09,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:09,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782025859] [2023-04-03 02:01:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:09,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:10,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:10,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782025859] [2023-04-03 02:01:10,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782025859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:10,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:10,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 02:01:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701889957] [2023-04-03 02:01:10,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:10,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 02:01:10,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 02:01:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-03 02:01:10,720 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:11,260 INFO L93 Difference]: Finished difference Result 156 states and 189 transitions. [2023-04-03 02:01:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:01:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2023-04-03 02:01:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:11,261 INFO L225 Difference]: With dead ends: 156 [2023-04-03 02:01:11,261 INFO L226 Difference]: Without dead ends: 118 [2023-04-03 02:01:11,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-04-03 02:01:11,263 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 110 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:11,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 113 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-03 02:01:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-04-03 02:01:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2023-04-03 02:01:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 68 states have internal predecessors, (81), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2023-04-03 02:01:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2023-04-03 02:01:11,291 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 40 [2023-04-03 02:01:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:11,292 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2023-04-03 02:01:11,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-03 02:01:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2023-04-03 02:01:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-03 02:01:11,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:11,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:11,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:01:11,293 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:11,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:11,293 INFO L85 PathProgramCache]: Analyzing trace with hash 292836862, now seen corresponding path program 1 times [2023-04-03 02:01:11,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:11,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910527420] [2023-04-03 02:01:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:11,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:12,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:12,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910527420] [2023-04-03 02:01:12,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910527420] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:12,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:12,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-03 02:01:12,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606058894] [2023-04-03 02:01:12,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:12,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-03 02:01:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-03 02:01:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-03 02:01:12,973 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 18 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:14,052 INFO L93 Difference]: Finished difference Result 254 states and 292 transitions. [2023-04-03 02:01:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-03 02:01:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2023-04-03 02:01:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:14,055 INFO L225 Difference]: With dead ends: 254 [2023-04-03 02:01:14,055 INFO L226 Difference]: Without dead ends: 187 [2023-04-03 02:01:14,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=1086, Unknown=0, NotChecked=0, Total=1406 [2023-04-03 02:01:14,057 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 424 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:14,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 133 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 02:01:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-04-03 02:01:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 103. [2023-04-03 02:01:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2023-04-03 02:01:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2023-04-03 02:01:14,088 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 42 [2023-04-03 02:01:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:14,089 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2023-04-03 02:01:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-03 02:01:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2023-04-03 02:01:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-03 02:01:14,089 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:14,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:14,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:01:14,090 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:14,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash -355486779, now seen corresponding path program 1 times [2023-04-03 02:01:14,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:14,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094004348] [2023-04-03 02:01:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:14,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:15,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:15,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094004348] [2023-04-03 02:01:15,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094004348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:01:15,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:01:15,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 02:01:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951981291] [2023-04-03 02:01:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:01:15,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 02:01:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:01:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 02:01:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 02:01:15,150 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 02:01:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:01:15,502 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2023-04-03 02:01:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-03 02:01:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-03 02:01:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:01:15,509 INFO L225 Difference]: With dead ends: 136 [2023-04-03 02:01:15,509 INFO L226 Difference]: Without dead ends: 134 [2023-04-03 02:01:15,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-04-03 02:01:15,512 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 36 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:01:15,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 607 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:01:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-03 02:01:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2023-04-03 02:01:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 74 states have internal predecessors, (85), 19 states have call successors, (19), 19 states have call predecessors, (19), 20 states have return successors, (21), 17 states have call predecessors, (21), 18 states have call successors, (21) [2023-04-03 02:01:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2023-04-03 02:01:15,555 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 43 [2023-04-03 02:01:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:01:15,555 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2023-04-03 02:01:15,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-03 02:01:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2023-04-03 02:01:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:01:15,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:01:15,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:01:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:01:15,562 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:01:15,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:01:15,562 INFO L85 PathProgramCache]: Analyzing trace with hash -830318555, now seen corresponding path program 1 times [2023-04-03 02:01:15,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:01:15,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318442385] [2023-04-03 02:01:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:01:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-03 02:01:20,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:01:20,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318442385] [2023-04-03 02:01:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318442385] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:01:20,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023867649] [2023-04-03 02:01:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:01:20,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:01:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:01:20,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-03 02:01:20,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 02:01:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:01:20,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-03 02:01:20,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:01:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:01:33,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:01:34,426 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 8029 disjunctions. This might take some time... [2023-04-03 02:01:37,542 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 8029 disjunctions.