/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 02:47:49,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 02:47:49,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 02:47:49,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 02:47:49,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 02:47:49,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 02:47:49,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 02:47:49,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 02:47:49,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 02:47:49,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 02:47:49,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 02:47:49,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 02:47:49,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 02:47:49,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 02:47:49,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 02:47:49,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 02:47:49,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 02:47:49,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 02:47:49,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 02:47:49,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 02:47:49,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 02:47:49,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 02:47:49,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 02:47:49,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 02:47:49,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 02:47:49,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 02:47:49,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 02:47:49,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 02:47:49,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 02:47:49,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 02:47:49,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 02:47:49,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 02:47:49,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 02:47:49,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 02:47:49,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 02:47:49,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 02:47:49,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 02:47:49,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 02:47:49,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 02:47:49,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 02:47:49,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 02:47:49,187 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 02:47:49,219 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 02:47:49,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 02:47:49,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 02:47:49,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 02:47:49,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 02:47:49,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 02:47:49,221 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 02:47:49,221 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 02:47:49,221 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 02:47:49,221 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 02:47:49,222 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 02:47:49,222 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 02:47:49,222 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 02:47:49,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 02:47:49,223 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 02:47:49,223 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 02:47:49,223 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 02:47:49,223 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 02:47:49,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 02:47:49,224 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 02:47:49,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 02:47:49,225 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 02:47:49,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 02:47:49,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 02:47:49,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 02:47:49,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:47:49,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 02:47:49,226 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 02:47:49,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 02:47:49,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 02:47:49,226 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 02:47:49,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 02:47:49,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 02:47:49,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 02:47:49,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 02:47:49,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 02:47:49,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 02:47:49,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 02:47:49,468 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 02:47:49,468 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 02:47:49,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-03 02:47:50,608 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 02:47:50,847 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 02:47:50,847 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-03 02:47:50,856 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670748e5c/da6efa7675184d539dfdb2ad3ec1b581/FLAG25b9a8196 [2023-04-03 02:47:50,868 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670748e5c/da6efa7675184d539dfdb2ad3ec1b581 [2023-04-03 02:47:50,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 02:47:50,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 02:47:50,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 02:47:50,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 02:47:50,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 02:47:50,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:47:50" (1/1) ... [2023-04-03 02:47:50,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@403f1c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:50, skipping insertion in model container [2023-04-03 02:47:50,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 02:47:50" (1/1) ... [2023-04-03 02:47:50,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 02:47:50,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 02:47:51,103 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2023-04-03 02:47:51,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:47:51,142 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 02:47:51,177 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[6322,6335] [2023-04-03 02:47:51,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 02:47:51,211 INFO L208 MainTranslator]: Completed translation [2023-04-03 02:47:51,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51 WrapperNode [2023-04-03 02:47:51,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 02:47:51,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 02:47:51,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 02:47:51,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 02:47:51,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 02:47:51,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 02:47:51,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 02:47:51,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 02:47:51,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (1/1) ... [2023-04-03 02:47:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 02:47:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:47:51,296 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 02:47:51,320 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 02:47:51,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 02:47:51,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 02:47:51,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 02:47:51,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 02:47:51,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 02:47:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 02:47:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 02:47:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 02:47:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 02:47:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 02:47:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 02:47:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 02:47:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 02:47:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 02:47:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 02:47:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 02:47:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 02:47:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 02:47:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 02:47:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 02:47:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 02:47:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 02:47:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 02:47:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 02:47:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 02:47:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 02:47:51,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 02:47:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 02:47:51,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 02:47:51,519 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 02:47:51,520 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 02:47:51,992 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 02:47:52,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 02:47:52,107 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 02:47:52,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:47:52 BoogieIcfgContainer [2023-04-03 02:47:52,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 02:47:52,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 02:47:52,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 02:47:52,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 02:47:52,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 02:47:50" (1/3) ... [2023-04-03 02:47:52,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bc373a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:47:52, skipping insertion in model container [2023-04-03 02:47:52,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 02:47:51" (2/3) ... [2023-04-03 02:47:52,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bc373a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 02:47:52, skipping insertion in model container [2023-04-03 02:47:52,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 02:47:52" (3/3) ... [2023-04-03 02:47:52,121 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2023-04-03 02:47:52,137 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 02:47:52,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 02:47:52,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 02:47:52,182 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;@7733dfc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 02:47:52,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 02:47:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 100 states have (on average 1.68) internal successors, (168), 101 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 02:47:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-03 02:47:52,193 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:52,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:52,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:52,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash 358961745, now seen corresponding path program 1 times [2023-04-03 02:47:52,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:52,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380686421] [2023-04-03 02:47:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:52,688 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 02:47:52,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:52,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380686421] [2023-04-03 02:47:52,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380686421] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:52,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:52,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:47:52,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525710790] [2023-04-03 02:47:52,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:47:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:47:52,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:52,719 INFO L87 Difference]: Start difference. First operand has 106 states, 100 states have (on average 1.68) internal successors, (168), 101 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:52,867 INFO L93 Difference]: Finished difference Result 236 states and 365 transitions. [2023-04-03 02:47:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:47:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-04-03 02:47:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:52,877 INFO L225 Difference]: With dead ends: 236 [2023-04-03 02:47:52,877 INFO L226 Difference]: Without dead ends: 160 [2023-04-03 02:47:52,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:52,883 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 126 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:52,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 340 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:47:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-04-03 02:47:52,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2023-04-03 02:47:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.4025974025974026) internal successors, (216), 154 states have internal predecessors, (216), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 219 transitions. [2023-04-03 02:47:52,933 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 219 transitions. Word has length 51 [2023-04-03 02:47:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:52,933 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 219 transitions. [2023-04-03 02:47:52,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 219 transitions. [2023-04-03 02:47:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-03 02:47:52,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:52,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:52,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 02:47:52,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:52,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash 80723812, now seen corresponding path program 1 times [2023-04-03 02:47:52,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:52,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196631298] [2023-04-03 02:47:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:52,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:53,094 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 02:47:53,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196631298] [2023-04-03 02:47:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196631298] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:53,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:53,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:47:53,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656020539] [2023-04-03 02:47:53,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:47:53,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:47:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:53,099 INFO L87 Difference]: Start difference. First operand 158 states and 219 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:53,177 INFO L93 Difference]: Finished difference Result 376 states and 547 transitions. [2023-04-03 02:47:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:47:53,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-04-03 02:47:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:53,190 INFO L225 Difference]: With dead ends: 376 [2023-04-03 02:47:53,190 INFO L226 Difference]: Without dead ends: 256 [2023-04-03 02:47:53,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:53,192 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 91 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:53,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 268 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:47:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-04-03 02:47:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 254. [2023-04-03 02:47:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.44) internal successors, (360), 250 states have internal predecessors, (360), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 363 transitions. [2023-04-03 02:47:53,250 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 363 transitions. Word has length 53 [2023-04-03 02:47:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:53,251 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 363 transitions. [2023-04-03 02:47:53,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 363 transitions. [2023-04-03 02:47:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-03 02:47:53,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:53,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 02:47:53,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:53,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:53,259 INFO L85 PathProgramCache]: Analyzing trace with hash -539228023, now seen corresponding path program 1 times [2023-04-03 02:47:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:53,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34827680] [2023-04-03 02:47:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:53,386 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 02:47:53,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:53,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34827680] [2023-04-03 02:47:53,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34827680] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:53,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:53,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:47:53,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302289850] [2023-04-03 02:47:53,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:53,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:47:53,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:47:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:53,389 INFO L87 Difference]: Start difference. First operand 254 states and 363 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:53,458 INFO L93 Difference]: Finished difference Result 642 states and 945 transitions. [2023-04-03 02:47:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:47:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-03 02:47:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:53,462 INFO L225 Difference]: With dead ends: 642 [2023-04-03 02:47:53,463 INFO L226 Difference]: Without dead ends: 426 [2023-04-03 02:47:53,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:53,465 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 86 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:53,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 253 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:47:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-04-03 02:47:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2023-04-03 02:47:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 420 states have (on average 1.457142857142857) internal successors, (612), 420 states have internal predecessors, (612), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 615 transitions. [2023-04-03 02:47:53,511 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 615 transitions. Word has length 56 [2023-04-03 02:47:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:53,512 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 615 transitions. [2023-04-03 02:47:53,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 615 transitions. [2023-04-03 02:47:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-03 02:47:53,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:53,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:53,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 02:47:53,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:53,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash -950223197, now seen corresponding path program 1 times [2023-04-03 02:47:53,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:53,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804687753] [2023-04-03 02:47:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:53,586 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 02:47:53,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:53,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804687753] [2023-04-03 02:47:53,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804687753] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:53,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:53,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:47:53,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176627338] [2023-04-03 02:47:53,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:53,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:47:53,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:53,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:47:53,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:53,589 INFO L87 Difference]: Start difference. First operand 424 states and 615 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:53,744 INFO L93 Difference]: Finished difference Result 1108 states and 1633 transitions. [2023-04-03 02:47:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:47:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-04-03 02:47:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:53,748 INFO L225 Difference]: With dead ends: 1108 [2023-04-03 02:47:53,748 INFO L226 Difference]: Without dead ends: 722 [2023-04-03 02:47:53,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:53,759 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 81 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:53,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 238 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:47:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2023-04-03 02:47:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 720. [2023-04-03 02:47:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 716 states have (on average 1.458100558659218) internal successors, (1044), 716 states have internal predecessors, (1044), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1047 transitions. [2023-04-03 02:47:53,864 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1047 transitions. Word has length 59 [2023-04-03 02:47:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:53,864 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1047 transitions. [2023-04-03 02:47:53,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1047 transitions. [2023-04-03 02:47:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-03 02:47:53,866 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:53,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:53,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 02:47:53,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:53,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1653667430, now seen corresponding path program 1 times [2023-04-03 02:47:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:53,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395264529] [2023-04-03 02:47:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:53,973 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 02:47:53,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395264529] [2023-04-03 02:47:53,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395264529] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:53,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:53,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-03 02:47:53,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895621402] [2023-04-03 02:47:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:53,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-03 02:47:53,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-03 02:47:53,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:53,979 INFO L87 Difference]: Start difference. First operand 720 states and 1047 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:54,201 INFO L93 Difference]: Finished difference Result 1908 states and 2793 transitions. [2023-04-03 02:47:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-03 02:47:54,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-04-03 02:47:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:54,224 INFO L225 Difference]: With dead ends: 1908 [2023-04-03 02:47:54,224 INFO L226 Difference]: Without dead ends: 1226 [2023-04-03 02:47:54,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-03 02:47:54,229 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 76 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:54,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 223 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 02:47:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2023-04-03 02:47:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1224. [2023-04-03 02:47:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1220 states have (on average 1.4459016393442623) internal successors, (1764), 1220 states have internal predecessors, (1764), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1767 transitions. [2023-04-03 02:47:54,393 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1767 transitions. Word has length 62 [2023-04-03 02:47:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:54,394 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1767 transitions. [2023-04-03 02:47:54,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:54,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1767 transitions. [2023-04-03 02:47:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-03 02:47:54,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:54,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-03 02:47:54,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:54,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash -515901194, now seen corresponding path program 1 times [2023-04-03 02:47:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:54,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103831081] [2023-04-03 02:47:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:54,681 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 02:47:54,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:54,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103831081] [2023-04-03 02:47:54,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103831081] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:54,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:54,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-03 02:47:54,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634433411] [2023-04-03 02:47:54,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:54,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-03 02:47:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:54,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-03 02:47:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:47:54,683 INFO L87 Difference]: Start difference. First operand 1224 states and 1767 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:55,928 INFO L93 Difference]: Finished difference Result 6194 states and 8940 transitions. [2023-04-03 02:47:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 02:47:55,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-03 02:47:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:55,950 INFO L225 Difference]: With dead ends: 6194 [2023-04-03 02:47:55,950 INFO L226 Difference]: Without dead ends: 5008 [2023-04-03 02:47:55,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:47:55,954 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 420 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:55,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 755 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:47:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2023-04-03 02:47:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 5000. [2023-04-03 02:47:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4996 states have (on average 1.4387510008006406) internal successors, (7188), 4996 states have internal predecessors, (7188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 7191 transitions. [2023-04-03 02:47:56,968 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 7191 transitions. Word has length 65 [2023-04-03 02:47:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:56,970 INFO L495 AbstractCegarLoop]: Abstraction has 5000 states and 7191 transitions. [2023-04-03 02:47:56,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 7191 transitions. [2023-04-03 02:47:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 02:47:56,971 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:56,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-03 02:47:56,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:56,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash -62793089, now seen corresponding path program 1 times [2023-04-03 02:47:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048707458] [2023-04-03 02:47:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:47:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:47:57,084 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 02:47:57,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:47:57,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048707458] [2023-04-03 02:47:57,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048707458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:47:57,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:47:57,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-03 02:47:57,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681741669] [2023-04-03 02:47:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:47:57,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-03 02:47:57,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:47:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-03 02:47:57,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-03 02:47:57,087 INFO L87 Difference]: Start difference. First operand 5000 states and 7191 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:47:58,609 INFO L93 Difference]: Finished difference Result 12825 states and 18545 transitions. [2023-04-03 02:47:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-03 02:47:58,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-03 02:47:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:47:58,644 INFO L225 Difference]: With dead ends: 12825 [2023-04-03 02:47:58,645 INFO L226 Difference]: Without dead ends: 7863 [2023-04-03 02:47:58,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-03 02:47:58,657 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 512 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-03 02:47:58,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 142 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-03 02:47:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7863 states. [2023-04-03 02:47:59,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7863 to 7861. [2023-04-03 02:47:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7861 states, 7857 states have (on average 1.4331169657630138) internal successors, (11260), 7857 states have internal predecessors, (11260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 11263 transitions. [2023-04-03 02:47:59,993 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 11263 transitions. Word has length 67 [2023-04-03 02:47:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:47:59,994 INFO L495 AbstractCegarLoop]: Abstraction has 7861 states and 11263 transitions. [2023-04-03 02:47:59,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:47:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 11263 transitions. [2023-04-03 02:47:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-03 02:47:59,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:47:59,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:47:59,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-03 02:47:59,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:47:59,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:47:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1028672412, now seen corresponding path program 1 times [2023-04-03 02:47:59,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:47:59,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524225713] [2023-04-03 02:47:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:47:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:48:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:00,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:48:00,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524225713] [2023-04-03 02:48:00,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524225713] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 02:48:00,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 02:48:00,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-03 02:48:00,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285230992] [2023-04-03 02:48:00,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 02:48:00,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-03 02:48:00,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:48:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-03 02:48:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-03 02:48:00,431 INFO L87 Difference]: Start difference. First operand 7861 states and 11263 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 02:48:03,382 INFO L93 Difference]: Finished difference Result 16755 states and 24213 transitions. [2023-04-03 02:48:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 02:48:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-03 02:48:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 02:48:03,439 INFO L225 Difference]: With dead ends: 16755 [2023-04-03 02:48:03,439 INFO L226 Difference]: Without dead ends: 16753 [2023-04-03 02:48:03,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-04-03 02:48:03,446 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 1079 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 02:48:03,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 2317 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 02:48:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16753 states. [2023-04-03 02:48:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16753 to 8213. [2023-04-03 02:48:04,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8209 states have (on average 1.4337921793153856) internal successors, (11770), 8209 states have internal predecessors, (11770), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 11773 transitions. [2023-04-03 02:48:04,819 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 11773 transitions. Word has length 67 [2023-04-03 02:48:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 02:48:04,819 INFO L495 AbstractCegarLoop]: Abstraction has 8213 states and 11773 transitions. [2023-04-03 02:48:04,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-03 02:48:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 11773 transitions. [2023-04-03 02:48:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-03 02:48:04,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 02:48:04,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 02:48:04,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-03 02:48:04,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 02:48:04,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 02:48:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash 918012447, now seen corresponding path program 1 times [2023-04-03 02:48:04,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 02:48:04,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530306961] [2023-04-03 02:48:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:48:04,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 02:48:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:06,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 02:48:06,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530306961] [2023-04-03 02:48:06,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530306961] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 02:48:06,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626425034] [2023-04-03 02:48:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 02:48:06,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 02:48:06,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 02:48:06,448 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 02:48:06,450 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 02:48:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 02:48:06,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 72 conjunts are in the unsatisfiable core [2023-04-03 02:48:06,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 02:48:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:09,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 02:48:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 02:48:28,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626425034] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 02:48:28,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885588668] [2023-04-03 02:48:28,743 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-04-03 02:48:28,743 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 02:48:28,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-03 02:48:28,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-03 02:48:28,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-03 02:48:29,636 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 180 for LOIs [2023-04-03 02:48:32,580 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 02:49:55,453 WARN L223 SmtUtils]: Spent 1.35m on a formula simplification. DAG size of input: 12213 DAG size of output: 456 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-03 02:50:26,780 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 02:50:38,712 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2023-04-03 02:50:40,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 151 for LOIs [2023-04-03 02:50:40,487 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-03 02:51:11,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103940#(and (= (mod main_~assert__arg~0 256) 0) (= ~nomsg~0 ~p2_new~0) (<= ~mode2~0 (+ 1 main_~check__tmp~0)) (= ~p3_new~0 ~p1_new~0) (<= 0 (+ main_~assert__arg~0 ~mode4~0)) (= ~__return_33173~0 main_~check__tmp~0) (= ~p3_new~0 ~p5_new~0) (= ~p4_new~0 ~p1_new~0) (<= 0 ~mode2~0) (= main_~main__c1~0 main_~assert__arg~0) (<= ~mode4~0 (+ 1 main_~check__tmp~0)) (= ~p3_new~0 ~p2_new~0) (<= ~mode3~0 (+ main_~assert__arg~0 1)) (<= 0 (+ main_~assert__arg~0 ~mode3~0)) (<= 0 ~mode5~0) (= main_~__tmp_1~0 ~__return_33173~0) (= main_~__tmp_1~0 main_~assert__arg~0) (<= (+ main_~__tmp_1~0 ~mode5~0) 2) (<= ~mode5~0 (+ ~__return_33173~0 1)))' at error location [2023-04-03 02:51:11,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-03 02:51:11,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 02:51:11,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 53 [2023-04-03 02:51:11,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135912917] [2023-04-03 02:51:11,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 02:51:11,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-03 02:51:11,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 02:51:11,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-03 02:51:11,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=11479, Unknown=0, NotChecked=0, Total=13340 [2023-04-03 02:51:11,564 INFO L87 Difference]: Start difference. First operand 8213 states and 11773 transitions. Second operand has 53 states, 53 states have (on average 4.226415094339623) internal successors, (224), 53 states have internal predecessors, (224), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)