/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:26:19,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:26:19,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:26:19,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:26:19,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:26:19,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:26:19,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:26:19,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:26:19,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:26:19,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:26:19,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:26:19,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:26:19,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:26:19,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:26:19,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:26:19,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:26:19,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:26:19,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:26:19,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:26:19,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:26:19,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:26:19,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:26:19,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:26:19,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:26:19,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:26:19,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:26:19,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:26:19,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:26:19,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:26:19,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:26:19,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:26:19,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:26:19,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:26:19,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:26:19,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:26:19,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:26:19,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:26:19,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:26:19,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:26:19,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:26:19,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:26:19,160 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 [2023-04-01 12:26:19,191 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:26:19,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:26:19,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:26:19,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:26:19,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:26:19,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:26:19,193 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:26:19,193 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:26:19,193 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:26:19,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:26:19,194 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:26:19,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:26:19,194 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:26:19,194 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:26:19,195 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:26:19,195 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:26:19,195 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:26:19,195 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:26:19,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:26:19,196 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:26:19,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:26:19,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:26:19,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:26:19,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:26:19,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:26:19,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:26:19,197 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:26:19,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:26:19,198 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:26:19,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:26:19,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:26:19,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:26:19,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:26:19,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:26:19,199 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:26:19,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:26:19,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:26:19,199 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:26:19,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:26:19,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:26:19,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:26:19,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:26:19,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:26:19,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:26:19,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:26:19,449 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:26:19,449 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:26:19,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2023-04-01 12:26:20,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:26:20,765 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:26:20,766 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2023-04-01 12:26:20,774 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f7e93bd/43cb5cef81ec4c53affb476551421948/FLAG8be9c2676 [2023-04-01 12:26:20,791 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f7e93bd/43cb5cef81ec4c53affb476551421948 [2023-04-01 12:26:20,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:26:20,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:26:20,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:26:20,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:26:20,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:26:20,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:26:20" (1/1) ... [2023-04-01 12:26:20,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74fad5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:20, skipping insertion in model container [2023-04-01 12:26:20,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:26:20" (1/1) ... [2023-04-01 12:26:20,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:26:20,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:26:21,079 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.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2023-04-01 12:26:21,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:26:21,090 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:26:21,141 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.3.1.ufo.BOUNDED-6.pals.c[12747,12760] [2023-04-01 12:26:21,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:26:21,155 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:26:21,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21 WrapperNode [2023-04-01 12:26:21,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:26:21,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:26:21,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:26:21,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:26:21,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,202 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:26:21,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:26:21,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:26:21,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:26:21,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (1/1) ... [2023-04-01 12:26:21,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:26:21,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:26:21,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:26:21,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:26:21,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:26:21,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:26:21,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:26:21,305 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:26:21,305 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:26:21,305 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:26:21,305 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:26:21,305 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:26:21,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:26:21,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:26:21,306 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:26:21,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:26:21,408 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:26:21,410 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:26:21,913 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:26:22,422 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:26:22,423 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:26:22,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:26:22 BoogieIcfgContainer [2023-04-01 12:26:22,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:26:22,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:26:22,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:26:22,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:26:22,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:26:20" (1/3) ... [2023-04-01 12:26:22,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f33c01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:26:22, skipping insertion in model container [2023-04-01 12:26:22,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:26:21" (2/3) ... [2023-04-01 12:26:22,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f33c01f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:26:22, skipping insertion in model container [2023-04-01 12:26:22,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:26:22" (3/3) ... [2023-04-01 12:26:22,432 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c [2023-04-01 12:26:22,447 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:26:22,447 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:26:22,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:26:22,525 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;@3bd46adc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:26:22,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:26:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 12:26:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 12:26:22,540 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:22,540 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] [2023-04-01 12:26:22,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:22,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash -49447829, now seen corresponding path program 1 times [2023-04-01 12:26:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:22,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748990355] [2023-04-01 12:26:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:22,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:25,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748990355] [2023-04-01 12:26:25,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748990355] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:25,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:25,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 12:26:25,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650184916] [2023-04-01 12:26:25,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:25,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 12:26:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 12:26:25,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:26:25,372 INFO L87 Difference]: Start difference. First operand has 47 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:26:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:26,153 INFO L93 Difference]: Finished difference Result 146 states and 187 transitions. [2023-04-01 12:26:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 12:26:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-04-01 12:26:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:26,163 INFO L225 Difference]: With dead ends: 146 [2023-04-01 12:26:26,163 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 12:26:26,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:26:26,171 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 467 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:26,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 104 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:26:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 12:26:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 70. [2023-04-01 12:26:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.434782608695652) internal successors, (66), 47 states have internal predecessors, (66), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 12:26:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2023-04-01 12:26:26,228 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 30 [2023-04-01 12:26:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:26,229 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2023-04-01 12:26:26,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:26:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2023-04-01 12:26:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 12:26:26,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:26,232 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] [2023-04-01 12:26:26,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:26:26,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:26,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:26,233 INFO L85 PathProgramCache]: Analyzing trace with hash -407957214, now seen corresponding path program 1 times [2023-04-01 12:26:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:26,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869442980] [2023-04-01 12:26:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:26,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:28,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869442980] [2023-04-01 12:26:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869442980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:28,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:28,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-01 12:26:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76346482] [2023-04-01 12:26:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:28,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 12:26:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:28,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 12:26:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:26:28,021 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:26:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:28,840 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2023-04-01 12:26:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 12:26:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 31 [2023-04-01 12:26:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:28,843 INFO L225 Difference]: With dead ends: 159 [2023-04-01 12:26:28,843 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 12:26:28,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 12:26:28,845 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 346 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:28,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 120 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:26:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 12:26:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 70. [2023-04-01 12:26:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 47 states have internal predecessors, (65), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:26:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-04-01 12:26:28,866 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 31 [2023-04-01 12:26:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:28,867 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-04-01 12:26:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:26:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-04-01 12:26:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 12:26:28,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:28,868 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] [2023-04-01 12:26:28,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:26:28,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:28,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1825102156, now seen corresponding path program 1 times [2023-04-01 12:26:28,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550421293] [2023-04-01 12:26:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:29,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:29,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550421293] [2023-04-01 12:26:29,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550421293] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:29,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:26:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449393378] [2023-04-01 12:26:29,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:29,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:26:29,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:26:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:26:29,985 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:26:30,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:30,345 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2023-04-01 12:26:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:26:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-04-01 12:26:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:30,347 INFO L225 Difference]: With dead ends: 139 [2023-04-01 12:26:30,347 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 12:26:30,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:26:30,349 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 113 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:30,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 74 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:26:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 12:26:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2023-04-01 12:26:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:26:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-04-01 12:26:30,366 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 32 [2023-04-01 12:26:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:30,366 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-04-01 12:26:30,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:26:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-04-01 12:26:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 12:26:30,367 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:30,367 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] [2023-04-01 12:26:30,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:26:30,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:30,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1700210997, now seen corresponding path program 1 times [2023-04-01 12:26:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:30,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641466602] [2023-04-01 12:26:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:30,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:31,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:31,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641466602] [2023-04-01 12:26:31,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641466602] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:31,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:31,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:26:31,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492988490] [2023-04-01 12:26:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:31,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:26:31,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:26:31,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:26:31,426 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:26:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:31,819 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2023-04-01 12:26:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:26:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2023-04-01 12:26:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:31,823 INFO L225 Difference]: With dead ends: 145 [2023-04-01 12:26:31,824 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 12:26:31,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:26:31,832 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:31,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 68 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:26:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 12:26:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2023-04-01 12:26:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 47 states have internal predecessors, (63), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:26:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2023-04-01 12:26:31,867 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 33 [2023-04-01 12:26:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:31,868 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2023-04-01 12:26:31,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:26:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2023-04-01 12:26:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 12:26:31,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:31,870 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] [2023-04-01 12:26:31,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:26:31,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:31,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1413027091, now seen corresponding path program 1 times [2023-04-01 12:26:31,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:31,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346420053] [2023-04-01 12:26:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:33,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:33,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346420053] [2023-04-01 12:26:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346420053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:33,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-04-01 12:26:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835815950] [2023-04-01 12:26:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:33,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 12:26:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 12:26:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 12:26:33,705 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:26:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:34,358 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2023-04-01 12:26:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 12:26:34,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-04-01 12:26:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:34,360 INFO L225 Difference]: With dead ends: 146 [2023-04-01 12:26:34,360 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 12:26:34,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:26:34,361 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 298 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:34,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 103 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 12:26:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 12:26:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2023-04-01 12:26:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 49 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:26:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2023-04-01 12:26:34,382 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 35 [2023-04-01 12:26:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:34,382 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2023-04-01 12:26:34,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 12:26:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2023-04-01 12:26:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 12:26:34,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:34,383 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] [2023-04-01 12:26:34,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 12:26:34,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:34,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash -198132245, now seen corresponding path program 1 times [2023-04-01 12:26:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:34,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764212806] [2023-04-01 12:26:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:34,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:34,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764212806] [2023-04-01 12:26:34,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764212806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:34,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:34,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:26:34,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137260495] [2023-04-01 12:26:34,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:34,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:26:34,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:26:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:26:34,953 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:26:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:35,244 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2023-04-01 12:26:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 12:26:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-04-01 12:26:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:35,246 INFO L225 Difference]: With dead ends: 144 [2023-04-01 12:26:35,246 INFO L226 Difference]: Without dead ends: 100 [2023-04-01 12:26:35,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-04-01 12:26:35,250 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 137 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:35,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 67 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:26:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-01 12:26:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2023-04-01 12:26:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:26:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2023-04-01 12:26:35,273 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 36 [2023-04-01 12:26:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:35,274 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2023-04-01 12:26:35,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 12:26:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2023-04-01 12:26:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 12:26:35,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:35,280 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] [2023-04-01 12:26:35,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 12:26:35,281 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:35,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 673022833, now seen corresponding path program 1 times [2023-04-01 12:26:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761592814] [2023-04-01 12:26:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:35,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:37,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761592814] [2023-04-01 12:26:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761592814] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:37,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:37,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-04-01 12:26:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294538666] [2023-04-01 12:26:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 12:26:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 12:26:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-01 12:26:37,528 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 12:26:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:38,645 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2023-04-01 12:26:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 12:26:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-04-01 12:26:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:38,647 INFO L225 Difference]: With dead ends: 156 [2023-04-01 12:26:38,647 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 12:26:38,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 12:26:38,649 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 325 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:38,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 115 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 12:26:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 12:26:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2023-04-01 12:26:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 12:26:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-01 12:26:38,670 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 38 [2023-04-01 12:26:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:38,670 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-01 12:26:38,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 12:26:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-01 12:26:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 12:26:38,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:38,671 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] [2023-04-01 12:26:38,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 12:26:38,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:38,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1071270403, now seen corresponding path program 1 times [2023-04-01 12:26:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:38,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977427179] [2023-04-01 12:26:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:39,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:39,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977427179] [2023-04-01 12:26:39,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977427179] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:26:39,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:26:39,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 12:26:39,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732565145] [2023-04-01 12:26:39,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:26:39,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 12:26:39,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:26:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 12:26:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 12:26:39,030 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 12:26:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:26:39,229 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2023-04-01 12:26:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 12:26:39,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-04-01 12:26:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:26:39,230 INFO L225 Difference]: With dead ends: 106 [2023-04-01 12:26:39,230 INFO L226 Difference]: Without dead ends: 104 [2023-04-01 12:26:39,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-04-01 12:26:39,232 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:26:39,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 408 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:26:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-01 12:26:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2023-04-01 12:26:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 12:26:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-04-01 12:26:39,277 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 39 [2023-04-01 12:26:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:26:39,277 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-04-01 12:26:39,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 12:26:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-04-01 12:26:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 12:26:39,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:26:39,279 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] [2023-04-01 12:26:39,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-01 12:26:39,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:26:39,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:26:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1453351483, now seen corresponding path program 1 times [2023-04-01 12:26:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:26:39,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753344165] [2023-04-01 12:26:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:39,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:26:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:26:42,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:26:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753344165] [2023-04-01 12:26:42,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753344165] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:26:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439670247] [2023-04-01 12:26:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:26:42,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:26:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:26:42,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:26:42,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:26:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:26:42,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 80 conjunts are in the unsatisfiable core [2023-04-01 12:26:42,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:26:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:26:54,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 12:26:55,379 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 7864 disjunctions. This might take some time... [2023-04-01 12:26:58,741 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 7864 disjunctions.