/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:21:52,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:21:52,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:21:52,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:21:52,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:21:52,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:21:52,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:21:52,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:21:52,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:21:52,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:21:52,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:21:52,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:21:52,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:21:52,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:21:52,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:21:52,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:21:52,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:21:52,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:21:52,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:21:52,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:21:52,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:21:52,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:21:52,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:21:52,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:21:52,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:21:52,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:21:52,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:21:52,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:21:52,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:21:52,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:21:52,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:21:52,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:21:52,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:21:52,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:21:52,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:21:52,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:21:52,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:21:52,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:21:52,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:21:52,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:21:52,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:21:52,241 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 06:21:52,270 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:21:52,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:21:52,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:21:52,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:21:52,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:21:52,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:21:52,272 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:21:52,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:21:52,272 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:21:52,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:21:52,273 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:21:52,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:21:52,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:21:52,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:21:52,274 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:21:52,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:21:52,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:21:52,274 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:21:52,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:21:52,275 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:21:52,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:21:52,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:21:52,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:21:52,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:21:52,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:21:52,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:21:52,276 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:21:52,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:21:52,276 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:21:52,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:21:52,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:21:52,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:21:52,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:21:52,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:21:52,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:21:52,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:21:52,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:21:52,544 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:21:52,544 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:21:52,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-01 06:21:53,702 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:21:53,962 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:21:53,962 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-01 06:21:53,986 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c394a12/aa86564898714b20a4889a6066d66b64/FLAG93631a6c4 [2023-04-01 06:21:54,002 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98c394a12/aa86564898714b20a4889a6066d66b64 [2023-04-01 06:21:54,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:21:54,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:21:54,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:21:54,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:21:54,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:21:54,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604d6b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54, skipping insertion in model container [2023-04-01 06:21:54,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:21:54,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:21:54,459 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.5.4.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-01 06:21:54,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:21:54,489 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:21:54,644 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.5.4.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-01 06:21:54,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:21:54,670 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:21:54,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54 WrapperNode [2023-04-01 06:21:54,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:21:54,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:21:54,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:21:54,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:21:54,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,808 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:21:54,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:21:54,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:21:54,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:21:54,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (1/1) ... [2023-04-01 06:21:54,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:21:54,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:21:54,853 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 06:21:54,881 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 06:21:54,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:21:54,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:21:54,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:21:54,899 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 06:21:54,899 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:21:54,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 06:21:54,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:21:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:21:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:21:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:21:54,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 06:21:54,902 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:21:54,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:21:55,107 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:21:55,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:21:56,638 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:21:58,081 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:21:58,081 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 06:21:58,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:21:58 BoogieIcfgContainer [2023-04-01 06:21:58,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:21:58,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:21:58,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:21:58,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:21:58,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:21:54" (1/3) ... [2023-04-01 06:21:58,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfe4339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:21:58, skipping insertion in model container [2023-04-01 06:21:58,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:21:54" (2/3) ... [2023-04-01 06:21:58,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dfe4339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:21:58, skipping insertion in model container [2023-04-01 06:21:58,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:21:58" (3/3) ... [2023-04-01 06:21:58,094 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c [2023-04-01 06:21:58,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:21:58,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:21:58,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:21:58,184 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;@18040369, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:21:58,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:21:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 06:21:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 06:21:58,222 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:21:58,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:21:58,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:21:58,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:21:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1201355822, now seen corresponding path program 1 times [2023-04-01 06:21:58,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:21:58,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476522739] [2023-04-01 06:21:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:21:58,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:21:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:22:11,137 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 06:22:11,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:22:11,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476522739] [2023-04-01 06:22:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476522739] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:22:11,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:22:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 06:22:11,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548693335] [2023-04-01 06:22:11,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:22:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 06:22:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:22:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 06:22:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 06:22:11,192 INFO L87 Difference]: Start difference. First operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 06:22:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:22:16,727 INFO L93 Difference]: Finished difference Result 594 states and 941 transitions. [2023-04-01 06:22:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 06:22:16,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-01 06:22:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:22:16,745 INFO L225 Difference]: With dead ends: 594 [2023-04-01 06:22:16,745 INFO L226 Difference]: Without dead ends: 536 [2023-04-01 06:22:16,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 06:22:16,752 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6477 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7271 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6480 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 7470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 7271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 06:22:16,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6480 Valid, 206 Invalid, 7470 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [199 Valid, 7271 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 06:22:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-04-01 06:22:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 510. [2023-04-01 06:22:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.680672268907563) internal successors, (800), 477 states have internal predecessors, (800), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 06:22:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 834 transitions. [2023-04-01 06:22:16,857 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 834 transitions. Word has length 160 [2023-04-01 06:22:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:22:16,858 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 834 transitions. [2023-04-01 06:22:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 06:22:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 834 transitions. [2023-04-01 06:22:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 06:22:16,861 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:22:16,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:22:16,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:22:16,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:22:16,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:22:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -57214818, now seen corresponding path program 1 times [2023-04-01 06:22:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:22:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489689883] [2023-04-01 06:22:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:22:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:22:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:22:22,657 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 06:22:22,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:22:22,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489689883] [2023-04-01 06:22:22,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489689883] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:22:22,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:22:22,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:22:22,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746817760] [2023-04-01 06:22:22,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:22:22,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:22:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:22:22,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:22:22,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:22:22,669 INFO L87 Difference]: Start difference. First operand 510 states and 834 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:22:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:22:25,780 INFO L93 Difference]: Finished difference Result 593 states and 939 transitions. [2023-04-01 06:22:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:22:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-01 06:22:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:22:25,788 INFO L225 Difference]: With dead ends: 593 [2023-04-01 06:22:25,788 INFO L226 Difference]: Without dead ends: 543 [2023-04-01 06:22:25,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:22:25,790 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 849 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 06:22:25,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 118 Invalid, 6335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 06:22:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-04-01 06:22:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 510. [2023-04-01 06:22:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6785714285714286) internal successors, (799), 477 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:22:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 832 transitions. [2023-04-01 06:22:25,850 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 832 transitions. Word has length 161 [2023-04-01 06:22:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:22:25,852 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 832 transitions. [2023-04-01 06:22:25,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:22:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 832 transitions. [2023-04-01 06:22:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 06:22:25,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:22:25,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:22:25,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:22:25,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:22:25,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:22:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2136837957, now seen corresponding path program 1 times [2023-04-01 06:22:25,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:22:25,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092838644] [2023-04-01 06:22:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:22:25,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:22:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:22:30,903 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 06:22:30,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:22:30,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092838644] [2023-04-01 06:22:30,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092838644] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:22:30,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:22:30,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 06:22:30,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565559299] [2023-04-01 06:22:30,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:22:30,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 06:22:30,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:22:30,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 06:22:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 06:22:30,906 INFO L87 Difference]: Start difference. First operand 510 states and 832 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:22:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:22:33,438 INFO L93 Difference]: Finished difference Result 587 states and 923 transitions. [2023-04-01 06:22:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 06:22:33,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-01 06:22:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:22:33,447 INFO L225 Difference]: With dead ends: 587 [2023-04-01 06:22:33,447 INFO L226 Difference]: Without dead ends: 542 [2023-04-01 06:22:33,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 06:22:33,449 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 854 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 06:22:33,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 111 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 06:22:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-04-01 06:22:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2023-04-01 06:22:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6764705882352942) internal successors, (798), 477 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 06:22:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 831 transitions. [2023-04-01 06:22:33,526 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 831 transitions. Word has length 162 [2023-04-01 06:22:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:22:33,527 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 831 transitions. [2023-04-01 06:22:33,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 06:22:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 831 transitions. [2023-04-01 06:22:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 06:22:33,529 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:22:33,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:22:33,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 06:22:33,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:22:33,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:22:33,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1073934425, now seen corresponding path program 1 times [2023-04-01 06:22:33,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:22:33,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463451527] [2023-04-01 06:22:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:22:33,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:22:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat